Python Interview Questions And Answers For Experienced

Python is a widely used high-level programming language that is popular among developers due to its simplicity, readability, and ease of use. If you are a 5-year experienced Python developer, it is essential to prepare yourself well for the job interview to demonstrate your expertise in this programming language.

Here are some of the most commonly asked Python interview questions for a 5-year experienced developer:

What are the key features of Python?
Python is known for its simplicity, ease of use, and readability. It supports a wide range of programming paradigms, including procedural, functional, and object-oriented programming. Python is an interpreted language, which means that it does not need to be compiled, making it easy to write and execute code quickly.

What is the difference between a list and a tuple in Python?
Lists and tuples are both used to store collections of data, but the main difference between them is that lists are mutable, while tuples are immutable. This means that you can modify the elements of a list, but not a tuple. Tuples are usually used to store related values that should not be changed, while lists are used to store collections of related values that may change over time.

What is the difference between Python 2 and Python 3?
Python 2 and Python 3 are two different versions of the Python programming language. Python 2 was the original version, and it is still in use by some developers. However, Python 3 is the current version and is recommended for new projects. The main differences between Python 2 and Python 3 include changes in the print statement syntax, division operator, and the way strings and bytes are handled.

What is a lambda function in Python?
A lambda function is a small, anonymous function in Python that can take any number of arguments, but can only have one expression. Lambda functions are often used when you need a simple function for a short period of time, and you don’t want to define a separate function for it.

What is the difference between a generator function and a normal function in Python?
A generator function in Python is a special kind of function that generates a sequence of values using the yield statement. A normal function, on the other hand, simply returns a value and does not maintain any state between calls. Generator functions are often used to create iterators that can produce a large sequence of values without using a lot of memory.

What is a decorator in Python?
A decorator is a special kind of function in Python that can modify the behavior of other functions. Decorators are usually used to add functionality to an existing function without modifying its code. Decorators are written as functions that take another function as input and return a new function as output.

How do you handle exceptions in Python?
In Python, exceptions are handled using the try and except statements. The try block contains the code that may raise an exception, while the except block contains the code that should be executed if an exception is raised. You can also use the finally block to execute code that should be executed regardless of whether an exception is raised or not.

What is the difference between shallow copy and deep copy in Python?
A shallow copy of an object in Python creates a new object that references the same memory location as the original object. A deep copy, on the other hand, creates a new object with a new memory location, and copies all of the elements of the original object. Shallow copy is usually used when you want to create a new object with the same values as the original, but you don’t want to create a completely new object. Deep copy is used when you want to create a completely new object that is independent of the original object.

What is a namespace in Python?
In Python, a namespace is a container that holds a set of names for the objects in a program. It is essentially a mapping of names to objects. Python uses namespaces to avoid naming conflicts and to provide a way to organize code. There are several types of namespaces in Python, including the built-in namespace, the global namespace, and the local namespace.

What is a module in Python?
In Python, a module is a file containing Python code that can be used in other programs. A module can define functions, classes, and variables that can be used by other programs. Modules can be imported into a program using the import statement, and multiple modules can be combined to create larger programs.

How do you create a virtual environment in Python?
A virtual environment is a self-contained directory that contains a specific version of Python and any additional packages required by a project. Virtual environments are used to avoid conflicts between different projects that use different versions of Python or different packages. To create a virtual environment in Python, you can use the command “python -m venv” followed by the name of the directory where you want to create the virtual environment.

What is the purpose of the init method in Python?
The init method is a special method in Python that is called when an object is created from a class. It is used to initialize the object’s attributes and to perform any other necessary setup. The init method is commonly used in object-oriented programming to define the behavior of a class when it is instantiated.

What is the difference between a class method and an instance method in Python?
A class method in Python is a method that is bound to the class and not to the instance of the class. It can be called on the class itself, rather than on an instance of the class. An instance method, on the other hand, is a method that is bound to the instance of the class and can only be called on an instance of the class.

How do you read and write files in Python?
In Python, files can be read and written using the open() function. The open() function takes a filename and a mode as input and returns a file object. The mode can be “r” for reading, “w” for writing, “a” for appending, and “b” for binary mode. To read from a file, you can use the read() method of the file object, and to write to a file, you can use the write() method.

What is the difference between a set and a frozenset in Python?
A set in Python is an unordered collection of unique elements, while a frozenset is an immutable version of a set. This means that you can modify a set by adding or removing elements, but you cannot modify a frozenset. Frozensets are often used as keys in dictionaries or as elements of other sets because they are hashable and immutable.

In conclusion, these are some of the most commonly asked Python interview questions for a 5-year experienced developer. It is essential to prepare yourself well for the interview by studying the fundamental concepts of Python and practicing writing code. By demonstrating your expertise in Python, you can increase your chances of landing a job as a Python developer.