Certainly! Here are some top interview questions for a Python developer along with their answers:
1. What is Python?
Answer: Python is a high-level, interpreted programming language known for its simplicity and readability. It supports multiple programming paradigms including procedural, object-oriented, and functional programming.
2. What are the key features of Python?
Answer: Key features of Python include:
– Readability and simplicity
– Dynamically typed
– Strong support for integration with other languages and tools
– Extensive standard library
– Large community and ecosystem of third-party libraries
3. What are the differences between Python 2 and Python 3?
Answer: Python 3 is the latest version of Python and has several key differences from Python 2 including:
– Print function: In Python 3, print is a function whereas in Python 2 it’s a statement.
– Unicode: Python 3 uses Unicode by default for string handling whereas Python 2 uses ASCII.
– Division: In Python 3, division of integers results in a float by default whereas in Python 2 it results in an integer.
4. Explain the difference between list and tuple in Python.
Answer: Lists and tuples are both sequence data types in Python, but the main difference is that lists are mutable (can be changed) whereas tuples are immutable (cannot be changed).
5.What is a dictionary in Python?
Answer: A dictionary in Python is a collection of key-value pairs, where each key is associated with a value. It is unordered and mutable.
6. How do you handle exceptions in Python?
Answer: Exceptions in Python can be handled using try-except blocks. The code that may raise an exception is placed inside the try block, and the code to handle the exception is placed inside the except block.
7. What is PEP 8?
Answer: PEP 8 is the style guide for Python code. It provides guidelines on how to format code for maximum readability and maintainability.
8. Explain list comprehension in Python.
Answer: List comprehension is a concise way to create lists in Python. It consists of an expression followed by a for clause, then zero or more for or if clauses.
9. What is the difference between ‘==’ and ‘is’ in Python?
Answer: ‘==’ is used for value equality comparison, whereas ‘is’ is used for identity comparison. ‘==’ checks if the values of two objects are equal, while ‘is’ checks if the objects themselves are the same object in memory.
10. What is the difference between ‘global’ and ‘local’ variables in Python?
Answer: Global variables are defined outside of any function and can be accessed from any part of the code. Local variables are defined inside a function and can only be accessed within that function.
11. What is the use of ‘self’ in Python?
Answer: ‘self’ is a reference to the current instance of a class in Python. It is used to access variables and methods within the class.
12. How do you import modules in Python?
Answer: Modules in Python are imported using the ‘import’ keyword followed by the module name. For example, ‘import math’ imports the math module.
13. Explain the use of ‘lambda’ functions in Python.
Answer: Lambda functions, also known as anonymous functions, are small, inline functions defined using the ‘lambda’ keyword. They are often used for short, simple operations.
14. What is the purpose of ‘yield’ in Python?
Answer: ‘yield’ is used in generator functions to return a value and temporarily suspend the function’s execution. It allows the function to resume from where it left off when called again.
15. What is the difference between ‘append ()’ and ‘extend ()’ methods in Python lists?
Answer: ‘append ()’ method is used to add a single element to the end of a list, whereas ‘extend ()’ method is used to add multiple elements (from another inerrable) to the end of a list.
These questions cover a range of topics commonly encountered in Python developer interviews. Understanding these concepts and being able to explain them clearly will help you succeed in your interviews.
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