Python is one of the most used programming languages in the world. Skills in this language can get you a dream development job and help you build a thriving career.
If you are preparing for the Python job interview and want to crack it in one go, then it is vital for you to go through the frequently asked and important questions.
Based on insights from various IT companies and brands that hire Python developers, we have curated some of the most asked Python interview questions for freshers and experienced candidates.
These questions will help you in getting a high-paying Python developer job or a smooth job switch with better opportunities.
You will get to know about the concepts that are very common and help you improve your coding knowledge of Python.
Go through these top-tier interview questions on Python programming and boost your self-confidence before you appear for an interview.
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Introduction to Python Programming Language
Python programming language was developed and introduced by Guido van Rossum on 20 February 1991. It is one of the most used languages because of its applications in modern technologies like Data Science, Machine Learning, and Artificial Intelligence (AI).
It is a free-to-use and open-source language with an easy syntax. Also, Python is a general-purpose language based on the concept of object-oriented programming (OOP).
Python is a dynamic type of language with the feature of portability that has extensive support for libraries.
What is the Scope of Python Programming?
Python is considered the best option for developing games and programs efficiently. With support for multiple programs, Python is the preferred choice for all future technologies such as AI, ML, and data science.
It also has broad community support and has way better code readability. The Python developer interview questions mentioned in this comprehensive write-up will challenge your knowledge and improve your arsenal, which will land you in a great pool of opportunities.
Python has a very good future scope in various sectors:
- Desktop GUI application
- Console-based applications
- Game development
- Software development
- Audio and video applications
- Image processing applications
- Internet of things
- Machine learning
- Artificial intelligence
Things to Know While Preparing for Python Interview Questions and Answers
This article has top Python programming interview questions that will test your overall skills in Python, including the theory part, basics, and coding concepts.
You should stay ready for questions based on future technologies other than conventional Python questions. Read about AI and ML as the question based on them will be asked in the interview.
Basic Python Interview Questions for Freshers With Answers
If you are looking for a Python developer job as a fresher, here are some top and common Python basic interview questions that will land you a decent job.
Python is a highly comprehensive and object-oriented programming language. It uses keywords and not just punctuations. It has way fewer syntactic constructions than other programming languages.
Here are some of the interview questions on Python for freshers to check their knowledge and improve their skills. If you know the answers to these questions, there are better chances of you clearing the interview.
1. What is Python?
Python is a general-purpose computer programming language based on object-oriented programming. The programs in Python can run equally on every operating system. It is the primary language used in modern technologies like AI, data science, and ML.
2. Python was developed in which year?
It was developed in 1991.
3. What are the primary uses of Python?
Here is the list of some areas where Python programming language is used:
- Data Analysis
- Software testing
- Web development
- Software and application development
- Game development
- Automation and scripting
- Machine Learning
- Artificial Intelligence
- Data science and data visualization
- Desktop GUI
- Image processing and graphic applications
- Creating operating systems
- Everyday tasks like downloading audio and video files, updating the lists, converting files, filling information, renaming and arranging large batches, setting notifications, and many more.
4. Who uses Python?
Most of the big names in the industry are using Python language for their operations. Brands like IBM, NASA, Pixer, Facebook, Spotify, Intel, YouTube, Instagram, Pinterest, Reddit, etc., use Python as one of the primary languages.
5. What are the benefits of using Python?
Python has various benefits, and some of them are:
- Easy to read and write
- Interpreted language
- Vast library functions
- Portable across various operating systems
- Presence of third party modules
- Various data analysis tools.
- Object-oriented programming base
- Open-source library
- Rich frameworks
- Testing instruments
6. How to write a program in Python?
Before writing a program in Python, there should be an interpreter like PyCharm installed on the system.
- Create a new project
- Select a location or storage space where files will be stored
- Click on the create button and select the new file
- Name the file
- Type a simple program
- Run the program from the run option in the Menu
- The output will be at the bottom of the screen
7. Where to run Python code?
You can run a Python code from the run option in the menu in an interpreter. A Python code can also run in command prompt code. It will run the program after entering the correct path of the file.
8. What is a function in Python with example?
A function in Python is a code block that runs when it is called in a program. Data can be passed into the function with the help of this, and it is known as a parameter. The function can also return data as results.
9. How many functions are there in Python?
There are basically three types of functions in Python:
– Built-in functions
These functions come defined with the Python language. Here are some of the built-in functions in Python:
- print() function
- len() function
- sum() function
- sorted() function
- dir() function
- max() function
– User-defined functions
These functions are defined by the user to perform a task in the program. These are defined with the def keyword at the start. These functions are written like this:
- def add_numbers()
- def entry()
– Anonymous functions
These are the functions that are defined without a name. Also called lambda functions, the anonymous functions are used when a user needs a function for a little time in function. It is written as— lambda()
10. Where is a Python function defined?
A function in Python is called with the help of the def keyword. A function block starts with this keyword, and then function name and parentheses(()) take place. Arguments are placed between this, and parameters can also be defined inside of this.
11. Is Python code compiled or interpreted?
Python code is interpreted. A Python code is converted into bytecode that is executed by a virtual machine in Python. A Python program is not needed to build like code for other languages where it is compiled, and it works on an interpreter only.
12. What is a dynamically typed language?
The exact same variable can be used multiple times in a program in a dynamically typed language like Python.
13. What are Python literals?
The raw data that is assigned to constants and variables are defined as literals in Python. Basically, these are used to represent a fixed value in the source code. It can be either a string type, a numeric type, a boolean type, etc.
14. What is an Interpreted language?
When the implementation of the programs is done directly without compilation of the program into machine language, the language is called interpreted language. These languages are slower than the compiled languages.
15. What is Python virtualenv?
The isolated environment for development and debugging Python is called virtualenv. It runs multiple applications with the help of pip. You can also use it to isolate a Python interpreter with settings and libraries.
virtualenv is a tool that is used for storing copies of Python and pip that are installed from the projects. With the help of this, a user can work on multiple projects on the same machine at the exact same time.
16. What do you think of the future of Python?
Most future technologies are mostly dependent on Python, and that is what makes it one of the most used languages.
Python is very popular, and it is used as it is less complex than other languages. The future is of Artificial Intelligence (AI) and Machine Learning (ML). Because the majority of programming in ML and AI is done with Python, the future of the language contains more opportunities.
17. How to reverse a list in Python?
The function that is used to reverse a list in Python is list.reserve()
18. What is the role of map() function in Python?
The Python map() function processes and transforms the iterable like tuples and lists without using for loop.
19. What is a Try block in Python?
It is a block that is preceded with the help of the try keyword.
20. What is the shortest method to open a text file and display content?
Using the ‘with’ command is the shortest way to open a text file and display the content in it.
21. Can you write a Python program to add two integers that are greater than zero without using the plus operator?
Yes, I can do it with the help of a bitwise operator.
22. What will be the output of this program? A=[1,3,4,5,8,9,11,56]
The indexing starts from zero, and the element at the second index is 4. The output will be 4.
23. What is the Python dictionary?
A dictionary in Python is a collection of items that are written in curly brackets with keys and values. The items are in no particular order and are used to retrieve the value for keys that are known.
24. Differentiate between new and override modifiers in Python.
If there are two methods with the exact same name to perform different tasks and provide different functionality, the concept of overriding is used.
The new modifiers hide the original method, which provides different functionality. The original method can also be accessed by the base class.
25. What is pass in Python?
Pass is a statement in Python that is used as a placeholder for upcoming codes. At execution, it does not show any error, but it is not allowed in loops, class definitions, if statements, or function definitions.
Basically, it is a null statement, and when it is executed, it will result in no operation.
26. What is recursion in Python?
When the functions call themselves in a program, the process is known as recursion. It has two parts, the base case and the recursive case.
The base case is used to stop the recursion, and the recursive base is where the function calls itself.
27. What are the basic applications of Python?
The basic applications of Python include:
- Web and web framework applications
- Image processing applications
- GUI based desktop applications
- Game development
- Data processing
28. Tell me the names of some Python built-in modules?
- OS module
- Random module
- Sys module
- Math module
- Collective module
29. How does closure occur in Python?
When a nested function defines a value in an enclosing scope, the closure occurs in the program. It remembers the values.
30 Tell me something about SciPy.
All the numerical code is stored in SciPy. It contains a better version of the linear algebra modules with more features. There are more algebra modules in SciPy as well.
31. What is the enumerate() function in Python?
Enumerate() is a function that is used to iterate through a sequence. It keeps track of both elements and the index. It takes the collection and returns it as an enumerated object.
Interview Questions for You to Prepare for Jobs
32. How does Python do Compile-time and Run-time code checking?
Python does not perform compile-time code checking except when the code is syntactically invalid. If the code is following the syntax rules, it will compile without even checking it.
Python run time code checking is done dynamically. All the parts of the program are checked at runtime.
33. What are the common built-in data types in Python?
- Binary type
- Boolean type
- Set type
- Mapping type
- Sequence type
- Numeric types
- Text type
34. What is the basic difference between .py and .pyc files?
.py files have the source code of a program, while the .pyc files have the bytecode of a Python program. Python compiles the .py files and saves them as .pyc files.
35. What are comments in Python? What are different types of comments?
Comments are text with the information in Python. These are used when two or more programmers are working on a project. The use of Python comments is to analyze, debug, and provide feedback.
Comments are of two types:
- Single line comment
- Multiple line comment
36. What are global, private, and protected attributes in Python?
- Global variables are defined in the global scope. Global keyword is used for using it in global scope in a function.
- Private attributes have double underscores as prefixes to their identifiers. They can not be accessed from outside directly, which results in AttributeError.
- Protected attributes have an underscore as a prefix to their prefix. It can also be accessed from outside the class.
37. How to remove duplicate elements from a list in Python?
Duplicate elements can be removed from the list by turning them into the set. The set (list) function is used for it.
38. What is Python Tkinter?
Tkinter in Python is a library and toolkit for GUI development. It has attributes like dimensions, fonts, colors, etc. It also gives support for various GUI applications.
39. What is Pyramid in Python?
A Python pyramid is made for larger applications. We can select a database, URL structure, templating style, database, etc., with the help of a pyramid. It provides flexibility as it is a heavy configuration program.
40. Is tuple comprehension possible in Python?
No, it is not possible because it will end up in a generator instead of a tuple comprehension.
41. What is the work of # in Python?
It is used to comment out everything that comes after on the line in Python.
42. What is the minimum and maximum length of an identifier in Python?
Identifiers can be of any length. There are no limitations on length in Python.
43. What are modules and packages in Python?
A package holds sub-packages and modules, and the file __init__.py is used in the package for holding user-interpreted codes.
A module is a file that has Python code. It also modifies the code to get executed in run time. It consists of the unit namespace, which also has extracted variables.
The modules prevent collision between global variable names, and packages do the same between module names. The packages are also reusable, and that is why they are preferred.
44. What is Scope in Python?
In Python, the location where we can find a variable and can access it when it is required is called scope. This is of two types: global and local.
Global variables are the ones that can be used by any part of the program and can be declared outside of any function.
Python Interview Questions for Experienced (2 to 4 Years)
If you are looking for advanced level Python coding interview questions, here are some of the most asked questions that will help you in a job interview as an experienced candidate.
Since more questions will be technical for experienced candidates but the strong basic knowledge is also tested in the interview.
These Python interview questions for 2 years experience as well as 3 and 4 years experienced pros will test the skills that you have acquired during your journey as a Python developer in the industry.
1. Which is the best Python code checker?
There are plenty of Python code checkers available that can be used to check the quality of code. Here are the top five Python code checkers:
2. Where to write Python code in Windows?
To run the code in Python, a system should have an integrated development environment for Python. You can also use Python commands in the command prompt window in Windows OS and run Python codes.
3. Does Python have a switch-case statement?
No, Python does not have a switch case statement.
4. Are methods and constructors the same thing?
No, methods and constructors are not the same things. The constructor in Python is a block of code that initializes objects that are created newly while the method is used to perform an operation on the existing objects.
5. What is the purpose of the bytes() function?
The byte() function in Python converts a normal object to the immutable byte object of the given size and data. It can also create empty bytes objects of a particular size.
6. Where will you use while instead of for?
I will use while loop when—
- there is a need to read a file into a variable,
- the increment value is nonstandard, and
- asking for user input.
7. What is the common difference between xrange and range in Python?
The range() returns a list of integers, while the xrange() returns a generator object. A range() keeps the entire list of elements in memory, but xrange() only keeps one element at a time.
Arithmetic operations can be performed with the help of range() which is not possible with the help of xrange(). Also, xrange() is not supported in Python 3.
8. What is the use of help() and dir() functions?
Both the help() and dir() functions are used for efficient observation of the built-in function. The dir() is a powerful inbuilt function that returns a list of methods. The help() is used for correlative purposes.
dir() also lists out all attributes, and the help() is used to reduce the complexity of the program.
9. What data type would you use if you want to store the first and last names of a cricket team?
I will use the dictionary in Python to store the data.
10. What are pickling and unpickling in Python?
Pickling is a process in Python by which the object structure is serialized. An object is changed into a byte stream in pickling.
Unpickling is a process in Python by which the original objects are retrieved from strings. It changes the byte stream into an object.
11. What is monkey patching in Python?
At run time, when a module or class is modified dynamically, it is known as money patching in Python.
12. What is *args?
It is a special syntax that is used in the function definition to pass variable arguments. The * symbol is used for variable-length arguments.
13. What is **kwargs?
It is a dictionary of the variable names and values. It is a special syntax used in the function definition to pass variable length arguments.
14. What modules are used in Python for sending mails?
Python has smtplib and email modules; we can import these modules into the created mail scripts and send mail by authenticating the user.
It also has a methodsmtp server port which requires two parameters to establish a connection.
15. What is GIL?
It is a mutex used for limiting access to objects in Python. GIL stands for Global Interpreter Lock, and it is used in thread synchronization to avoid deadlocks. It is very helpful in multitasking.
16. Tell me about metaclass and where it is used?
The metaclass is basically a class for a class in Python. It can specify certain behaviours which are common among multiple classes. One of the most common metaclasses in ABCMeta is used to create an abstract class.
17. How would you end a block in Python?
I will use a colon (:), which is used to represent the end of a block in Python.
18. You need to add elements in a Python program; would you rather use the append() or extend() function?
I will use the append() function for adding elements in Python. The extend() function in Python is used to concatenate lists.
19. I wrote a Python code on Windows and want to use the same code on Mac. Can I do that without making any changes to the code?
Yes, you can do that. If you have a Python environment on the Mac, you can run the same code. You can also use the same code on various other target platforms, including Linux.
20. Tell me about the use of self in Python?
Self is a parameter in Python which can be used to access the variable of the class. With this keyword, you can distinguish between instance attributes from local variables. Self is used to increase the readability of the code.
21. What is __init__ in Python?
The __init__ in Python is used to initialize attributes of an object and used within the class. It is a reserved method in Python that works on an object-oriented approach. It is called each and every time an object is created from classes.
22. What is the lambda function in Python?
In Python, a lambda is a small function that is anonymous. With the help of one expression, it can take so many arguments. It is used when a nameless function is needed for a short period of time.
23. What is docstring in Python?
Docstring in Python is string literals that appear in a program after the definition of functions, methods, modules, and classes. It describes the working of the function as well.
24. Explain how you can make a Python Script executable on Unix?
To make the Python script executable on UNIX, the user should put #!/usr/bin/env in the first line of the Python project. After that, execution permission is added using chmod. After this, execute the script from the command line.
25. How is memory managed in Python?
First of all, the memory allocator ensures the storage in the operating system; after checking the memory, the memory manager in Python delegates the required memory to object-specific allocators.
Memory allocation in Python involves segmentation, sharing, preallocation, and caching. The interpreter performs the Python heap and manipulates object pointers to memory blocks. Later, the heap space is allocated by the memory manager with the help of the Python API function.
26. How can you concatenate two tuples in Python?
I will use the ‘+’ operator for concatenating multiple tuples. A tuple data type is immutable, and it can not be changed by accessing index elements. The sum() function can also be used to concatenate two tuples.
27. What is middleware?
It is a regular Python class that is related to the request life cycle of the Django framework.
28. Why do we prefer Django for security purposes?
Django can avoid clickjacking, SQL injections, and cross-site scripting.
29. Tell me about the timer method in Python.
It is a method in Python that is available with threading. It helps to bring the same functionality as Python time sleep.
30. What is the difference between the remove() function and del statement?
The remove() is an in-built method, while the del is a keyword. The purpose of both is the same, but the behaviour is different as remove() deletes the values from the list with the help of value.
The del deletes values from the list with the help of the index.
31. How to remove whitespaces from any particular string in Python?
The strip() method is an in-built function that is used to remove whitespace in Python. It trims a string by removing the whitespaces in the program.
If only the trailing or leading part of the program needs to be removed, istrip() and rstrip() functions are used.
32. What is a negative index in Python, and why are they used?
It is used to display the data from the end of the list in any code. Negative indexing can be done without using any other function.
Negative indexing is used to display data from the end of the list and reverse any string or number using other functions in Python.
The negative index starts where the array ends. The last value in negative indexing is considered the first value.
33. What are lists and tuples in Python? What is the key difference between these two?
Lists and tuples store one or more values in a specific order in a program. Lists and tuples are classes of data structures. The classes in the list are dynamic, whereas the tuple is static. The tuple is faster than the list in Python.
If we talk about the differences between the two, lists are mutable, and tuples are immutable. Tuple consumes less memory than a list and is more time-taking. The list is used for performing operations like deletion and insertion, but a tuple is used for accessing the elements.
34. Which function is used for converting a list to a string?
The .join function is used for converting a list of a string.
35. What are / and // operators in Python?
- The / is a division operator and returns the values in the quotient.
- The // is the floor division operator and is used to return the values of the quotient before the decimal. It only gives the value before the decimal values.
36. What are pandas in Python?
Pandas is an open-source library in Python. It supports data structure for data-based operations associated with data manipulation and analysis. It has rich sets of features that are used in data operations and algorithms.
37. How is an empty class created in python?
An empty class in Python can be created by using the pass command, which is a null statement. Pass command is used after the definition of a class object.
38. Tell me the difference between Django and Flask.
Django is a Python framework used for creating large applications, and Flask is a micro Python framework used for creating small applications. Django includes an ORM, while Flask does not require any external library.
39. How to generate random numbers in Python?
For generating random numbers, a random module is used. The method is defined as:
- import random
This method returns the floating-point numbers. Functions like randrange(), uniform(), normalvariate() can also be used for generating random numbers.
40. Explain PYTHONPATH?
When a module is imported, PYTHONPATH is used. It is an environment variable that also checks the modules present in the directories.
41. Is Python lists better than NumPy? If yes, then how?
No, lists are not better than NumPy. Python NumPy array is used instead of the list because of less memory and fast and convenient processing.
42. Why do we use the finalize method in Python?
The finalize method is used for freeing up the resources that are unmanaged. It is very helpful in memory management tasks and clean-up before the implementation of the garbage collection method.
43. What is pandas groupby in Python?
It is a feature that is used to split and group any object in the project. It is used for grouping the data by classes and entities.
44. Does the assignment operator copy objects? If not, then how will you copy an object in Python?
The assignment operator does not copy objects, but it makes a binding between the target and the existing object. Copying the module is necessary for creating a copy of any object in Python. It can be done in two ways— shallow copy and deep copy.
45. Explain shallow copy and deep copy.
– Shallow copy
It is a bitwise copy of an object. Shallow copy creates exact copies of the values in original objects. It is a deep and faster copy, and stores references to various objects in the main memory.
– Deep copy
It copies all data from source to target object. In addition, the deep copy duplicates the objects by source. It is slightly slower than the shallow copy. The changes are only visible in the copied element.
46. If do while loop doesn’t end with a semicolon, will it still work?
Python does not support the do-while loop.
47. What is len() function in Python?
len() function is used for finding out the length of a string, an array, or a list.
48. What is the full form of SVM, and where is it used?
SVM stands for Support Vector Machine. It is a machine learning model that is considered an algorithm for classification.
Advanced Python Interview Questions for 5 Years Experience
If you possess experience of more than five years as a Python developer, it simply means that you know everything basic about Python programming.
For Python interview questions for experienced professionals, we have covered some advanced-level questions that will check your expertise in the field.
Here are some of the top and most asked Python technical interview questions that will help you in preparation for an interview.
1. Which is the best Python code to Java code converter?
Jython is mostly used for using Python codes on the Java platform. It is an open-source implementation of Python code integrated with Java.
The code is compiled to Java bytecode and runs on any Java virtual machine. It gives access to all the Java libraries.
2. What are some Python code best practices?
Here are some of the best Python code practices that a developer should follow:
- Creating a code repository for Python and implementing version control
- Creating readable documentation
- Following style guidelines in Python
- Fixing broken codes instantly
- Using virtual environments
- Using Python package indexes
- Writing easy and readable codes
- Using the correct data structures
- Using codes that are object-oriented
3. In Python 3 and later, what is the use of a nonlocal statement?
It is used to assign values to a variable in an outer scope. It causes listed identifiers to refer to the previous variable in the nearest enclosing scopes.
4. If you installed a module with the pip, but it doesn’t import in your IDLE, what are the possible reasons?
There can be two possible issues in this process:
- If the system has Python 2. Since NumPy is installed for Python 3.6 and the latest versions, this will show an error.
- Check if there is an issue with the configuration of the anaconda with IDLE. If the system is using default Python in place of anaconda, NumPy can not be installed.
5. What is os.walk() function in Python?
The os.walk() is a function that generates the file names in the directory tree. It is done by walking the tree either bottom-up or top-down. It yields a 3-tuple for each directory, which are dirpath, dirnames, and filenames.
6. How is staticmethod different from classmethod?
Both the methods are used to define a class method that is installed without instantiating the object in a class. The signature in both methods is different.
7. What is the use of the PYTHONSTARTUP environment variable in the Python program?
The PYTHONSTARTUP environment variable is used to specify the particular location of the path to a file in Python. It can also be used in setting colors and preloading modules. This script will run before the interpreter.
8. What is the use of the PYTHONCASEOK environment variable in the Python program?
It is used to find the first case-sensitive matches in the import statements. It is used to ignore all import statements while calling the interpreter in Python.
9. What is PEP 8, and tell me about its importance?
PEP 8 is a document that guides the users with best practices on a Python program. The document was written by Guido van Rossum, Barry Warsaw, and Nick Coghlan in 2001.
With the primary focus on improving the readability and consistency of Python code, Python Enhancement Proposal or PEP is also used for improving the design and style of a program.
9. What are decorators in Python?
Decorators in Python are used to add functionality to a class or a function. It can change the behaviour of a class without permanent modification in it.
10. What is the dogpile effect? What would you do to prevent this effect?
When the cache expires, and the client requests multiple times for the website at the same time, the dogpile effect occurs.
I will use the semaphore lock to prevent this effect. Because when the value expires, it will acquire the lock and generate a new value.
11. What is multithreading in Python?
When several programs are running concurrently by invoking multiple threads, the process is called multithreading. The Thread class in Python is a predefined class. It is defined in the threading module.
It is a lightweight process. Several threads refer to the data space with the main thread and share information easily by communicating with each other. Threads can be used for calculating results while the main part of the program is running.
12. What is Python’s parameter passing mechanism?
Parameter passing can be done by two methods in Python:
- Pass by reference: All the arguments are passed by reference in any function in Python. When the value of the parameter is changed within the function, the change can also be seen in the calling function.
- Pass by value: When an argument in the program is passed to the function, only values pass to the function, leaving reference behind. It is not changeable and immutable.
13. How good is Python for data analysis?
Python is very good for data analysis. Processes like data mining, data processing, and data visualization are done easily with the help of Python.
14. Tell me about the use of frozenset in Python?
The frozenset is a collection of unique values in Python. It is an immutable collection that is made of distinct hashable objects. The values in the frozenset can not be changed, and methods from the set on the frozenset can’t be used and updated.
15. What are the differences between Python 2 and Python 3?
Python 2 is faster than Python 3. The print keyword is considered a statement in 2 and a function in 3. Strings are stored as ASCII as default in version 2, while UNICODE is in version 3 as default.
The xrange() function is used for iterations in Python 2, and the range() function is used to perform iterations in Python 3. Version 2 is used by the DevOps engineer, and version 3 is used in fields like data science and software engineering.
The syntax is also easier in Python 3 than in Python 2. Many libraries in Python 2 are not forward compatible and are strictly used with Python 3.
When the division of integers is performed, version 2 of Python gives an integral value while version 3 provides floating type values.
Exceptions are enclosed in notations in Python 2 and enclosed in parentheses in Python 3. If variables are used in a for loop, the values change in Python 2 but never change in Python 3.
16. What is the execution time for else part of a try-except block?
The else part of the try-except block will execute when there is no exception in the program.
17. Is it possible to call the parent class without its instance creation?
Yes, it is possible by creating an object of the child class and calling the function of the parent class in the Python program with the help of the dot operator.
18. What are Python namespaces? Why are they used?
A namespace in Python is a system that has a unique name for every object. It is used to implement scope, and it is created when a function, package, or module is evaluated. Basically, It is used to organize codes into logical groups when there are multiple libraries.
19. How will you combine data frames in pandas?
The data frames in pandas can be combined with three methods:
- Concatenating dataframes by stacking the two of them vertically.
- Concatenating dataframes by stacking the two of them horizontally.
- Combining dataframes on a common column is called joining.
Python OOPS Interview Questions
Python is an OOPS based language, and this concept makes it easy for programmers to write codes in it. Here are some quality Python coding questions and answers to help you in an interview.
1. How is OOPS used in Python?
OOPS is a paradigm in Python that uses classes and objects. Coding is done with the help of real-world elements like class, data abstraction, polymorphism, inheritance, encapsulation, etc.
2. What is encapsulation in Python?
It is a concept in OOP that is used to wrap data and the methods that work on data within a single unit. This helps a Python program to restrict the variable that is used to prevent unnecessary modifications and changes to the data.
With encapsulation, the data can be changed by the method of the object. These methods are called private variables. A class is a good example of encapsulation in Python as it is used to encapsulate the data like variables and member functions.
3. What is inheritance in Python?
It is the capability of one class in the program that is used to inherit the properties from another class. The class that derives properties is called the child class or derived class, and the class from which the properties are derived is known as the parent class or base class.
4. Tell me about the types of inheritance?
Inheritance is of four types:
- Single inheritance
- Multilevel inheritance
- Multiple inheritances
- Hierarchical inheritance
5. What are the advantages of using inheritance in Python?
Here are some of the key advantages of using inheritance in a Python code:
- It provides the reusability of the code.
- It is used for showing real-time relationships.
- It allows additional features to a class in the code without any modification.
- It is transitive in nature.
6. What is data abstraction in Python?
Data abstraction is used for hiding the actual implementation of the Python program, and it is done by showing only the functionalities.
If a class has one abstract function, it is called an abstract class. Once the module is imported from the ABC (Abstraction Base Class) module, abstract methods can be created in a Python program.
7. What is polymorphism in Python?
It means to have multiple forms of any object in a Python program. A code can be used to determine and differentiate the program.
Python Code Interview Questions With Basic Programs & Examples You Must Practice
You must have read the theory from books or tutorials, but the main part of any development job program. Here are some of the commonly asked Python code examples for interview preparation that will help you in cracking a Python developer interview.
These programs will help you develop and check your real-time coding knowledge and skills. Working on these projects will also help you in holding a tighter grip on Python.
You can practice these projects in Python to get a stronghold on the language. It will help you in finding Python programming questions and answers in a better way.
- Python code for printing HelloWorld
- Python code to add two or more numbers
- Python code to find factorial of a number
- Python code to reverse a string
- Python code for snake game
- Python code for building a calculator
- Python code for cracking a WiFi password
- Python code to check prime number
- Python code for Fibonacci series
- Python code for sending WhatsApp messages
130+ Python Interview Questions and Answers PDF (Free Download)
Here we have provided the best questions and answers related to the Python language. You can also download Python interview questions pdf free to prepare in offline mode on your device.
Prepare with these questions and get a high-paying job in Python programming.
What is included in this free Python Interview Questions PDF?
This Python interview questions PDF contains more than 130 questions and answers. These commonly and frequently asked questions asked by the employers will help you prepare for the interview.
This PDF has questions and answers for beginner-level Python developers, programmers with 2 to 4 years of experience, and programmers with more than five years in the industry.
This PDF also has questions based on basic programs in Python. You can also find the most advanced questions based on modern technologies.
Average Python Developer Salary
Python is one of the most widely used programming languages in the world. It offers higher salaries if a developer has a strong command of the language.
The average salary varies from country to country, but because of the high demand for Python developers, the salary is comparatively higher than other language developers.
The salary will also keep increasing with the time as Python is on the rise and most of the future technologies are fully reliant on Python.
What is Salary of Python Developer in India?
The average Python developer salary in India is around six lakhs. The fresher developer of Python makes around 3 to 5 lakhs INR per annum in India.
It keeps increasing with the expertise, and a Python developer salary in India per month with a strong command can reach up to a humongous 5 lakh INR.
What is Python Developer Salary in the US?
A Python developer in the USA makes from $50,000 to $1,50,000 per annum. It keeps increasing with the experience and command of the language.
What is the Average Python Developer Salary in Canada?
The salary of a fresher Python developer in Canada ranges from $60000 to $1,75,000 per annum. The experience and expertise can get you a better job with a huge amount.
Which Companies Are Hiring Python Developers in India?
Here are some of the top companies in India that are hiring Python developers. You can work with them as a fresher or as an experienced candidate and take your career to the next level.
- Tech Mahindra
- Mahiti Infotech
- Cognizant Technology Solutions
- Gale Technologies
Big international brands like Dropbox, McAfee, Instagram, Nokia, Dell, Uber, Netflix, Spotify, Google, Pinterest, etc., also use Python language or framework in development. They also hire Indian talent as per their experience.
India’s Best Python Course Online With Certificate & Placement
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We are providing the best course in Python at a very reasonable price. You can find the best Python educators on our platform. The certificate is also valid worldwide, and you can also grab jobs overseas.
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FAQs Related to Interview Questions for Python
You might have questions in your mind if you are preparing for an interview as a Python developer. Here are some of the frequently asked questions for Python interview:
Python development is a very good career option anywhere in the world, including in India. You can get a great package with a strong command of the language.
You can develop codes and create software of any kind. You can find a job as per your skill set. Here are some of the best job options in Python:
– Data analyst
– Software engineer
– Web developer
– Python trainer
– Data scientist
– Machine learning engineer
– Product and quality engineer
There are several platforms from where you can learn Python in Hindi. You should choose the course after proper research as the quality of the content and way of teaching is very important factors.
We are providing the best course on Python development in Hindi, which will help you understand all the concepts precisely.
Python is so popular as it uses easy syntax, and most importantly, it has a wide variety of libraries and packages that are free to use.
It is also popular because of the increasing demand for modern technologies like AI and ML.
You can enrol in the online Python course by WsCube Tech and become a Python developer by practising more and more programs in Python.
You should know about Python frameworks and increase your command over libraries in Python. It will be the first step toward becoming a Python developer.
The starting salary of a Python coding developer in India is somewhere near INR 3 LPA.
A Python developer in TCS can make up to 20 lakhs per annum with experience. The salary for freshers in Tata Consultancy Services ranges from INR 3 to 8 LPA. It offers 5% more salary than the average salaries of Python developers in India.
The average salary of a Python programmer in Google is 15 Lakhs per annum. A Python developer at Google makes around INR 5 to 30 LPA in Google India.
Bangalore is the hub for the IT sector, and the demand is at its maximum in the city. A Python developer earns INR 5 to 15 LPA in Bangalore.