50+ Python Developer Interview Questions and Answers for Freshers

To convert a .txt file into a .csv file in Python, you can use the csv module.

• Import the csv module

• Open the .txt file in read mode

• Open a new .csv file in write mode

• Use csv.reader to read the .txt file line by line

• Use csv.writer to write each line to the .csv file

Local variables are variables that are defined within a function and can only be accessed within that function. Global variables are variables that are defined outside of any function and can be accessed throughout the program.

• Local variables are created when a function is called and destroyed when the function completes.

• Global variables can be accessed and modified by any function in the program.

• Using local variables helps in encapsulation and prevents naming conflicts.

• Globa...read more

Arrays are homogeneous data structures while lists are heterogeneous data structures in Python.

• Arrays are fixed in size while lists are dynamic.

• Arrays can only contain elements of the same data type while lists can contain elements of different data types.

• Arrays are faster and more memory-efficient for numerical operations.

• Lists have more built-in functions and are more versatile for general-purpose programming.

• Example of array: import array as arr; a = arr.array('i', [1, 2, ...read more

Agree, taking time to learn the new domain is crucial for success.

• Learning the new domain will help us understand the business requirements better.

• It will also help us identify potential challenges and opportunities.

• We can leverage our existing skills and knowledge to build better solutions.

• Taking time to learn the new domain will also help us build credibility with stakeholders.

• We can use this time to network and build relationships with experts in the new domain.

Lists are mutable while tuples are immutable in Python.

• Lists use square brackets [] while tuples use parentheses ().

• Elements in a list can be added, removed, or modified while tuples cannot be modified.

• Lists are used for collections of homogeneous items while tuples are used for heterogeneous items.

• Lists are generally used for large collections of data while tuples are used for smaller collections or for data that should not be changed.

• Lists are slower than tuples in terms of...read more

Answers to common Python interview questions.

• Namespace is a container for storing variables and functions.

• Dictionary is a collection of key-value pairs.

• Type conversion is the process of converting one data type to another.

• Arrays are homogeneous while lists are heterogeneous.

• Functions are blocks of code that perform a specific task.

Python is a high-level, interpreted programming language known for its simplicity, readability, and versatility.

• Python is used for web development, data analysis, artificial intelligence, and more.

• Advantages of Python include its ease of use, large standard library, and community support.

• Functions in Python are used to group related code and make it reusable.

• The break statement is used to exit a loop prematurely.

• A tuple is an ordered, immutable collection of elements.

Lists are mutable, ordered collections; tuples are immutable, ordered collections in Python.

• Mutability: Lists can be modified (e.g., list.append(4)), while tuples cannot (e.g., tuple[0] = 1 raises an error).

• Syntax: Lists use square brackets (e.g., my_list = [1, 2, 3]), while tuples use parentheses (e.g., my_tuple = (1, 2, 3)).

• Performance: Tuples are generally faster than lists for iteration due to their immutability.

• Use Cases: Lists are used for collections of items that may ...read more

append adds a single element, while extend adds multiple elements from an iterable to a list.

• append(obj): Adds 'obj' as a single element to the end of the list. Example: lst.append(4) results in [1, 2, 3, 4].

• extend(iterable): Adds each element from 'iterable' to the list. Example: lst.extend([4, 5]) results in [1, 2, 3, 4, 5].

• Use append when you want to add one item; use extend when you want to merge another iterable into the list.

• Both methods modify the original list in plac...read more

Testers focus on finding defects while developers focus on creating software.

• Testers are responsible for testing the software and finding defects.

• Developers are responsible for creating the software and fixing defects.

• Testers use test cases and scenarios to ensure the software meets requirements.

• Developers use programming languages and tools to create software.

• Testers work closely with developers to ensure defects are fixed.

• Developers work closely with testers to understand a...read more

Lists are mutable while tuples are immutable.

• Lists are enclosed in square brackets [], while tuples are enclosed in parentheses ().

• Elements in a list can be added, removed or modified, while elements in a tuple cannot be modified.

• Lists are used for collections of homogeneous items, while tuples are used for collections of heterogeneous items.

• Lists are generally used for sequences that need to be modified frequently, while tuples are used for sequences that are accessed freque...read more

Lambda functions are anonymous functions that can be defined in a single line of code.

• Lambda functions are defined using the lambda keyword.

• They can take any number of arguments, but can only have one expression.

• They are often used as arguments for higher-order functions.

• Example: lambda x: x**2 defines a lambda function that squares its input.

Design a CRUD App with AYSNC and AWAIT Operations in Fast API

• Use FastAPI framework for building the CRUD operations

• Implement async and await keywords for asynchronous operations

• Utilize SQLAlchemy for database operations

• Include endpoints for Create, Read, Update, and Delete operations

To build ourselves for technology needs, we need to constantly learn and adapt to new technologies and trends.

• Stay updated with the latest technologies and trends in the industry

• Attend conferences, workshops, and webinars to learn new skills

• Practice coding regularly and work on personal projects to improve skills

• Collaborate with other developers and participate in open source projects

• Read blogs, articles, and books related to technology

• Be open to learning new programming lang...read more

Reverse a dictionary in Python

• Create a new dictionary with values as keys and keys as values

• Use dictionary comprehension to create the new dictionary

• If there are duplicate values, use a list comprehension to create a list of keys

• Use the built-in function 'reversed' to reverse the order of the keys or values

Lists and tuples are both sequence data types in Python, but they have some key differences.

• Lists are mutable, meaning their elements can be changed, added, or removed, while tuples are immutable.

• Lists are defined using square brackets [], while tuples are defined using parentheses ().

• Lists are typically used for collections of similar items, while tuples are used for heterogeneous data.

• Lists have more built-in methods for manipulation, such as append(), extend(), and remove(...read more

A while loop is a control flow statement that allows code to be executed repeatedly based on a condition.

• The loop continues until the condition becomes false

• The condition is checked before each iteration

• The loop body must include a way to modify the condition to avoid an infinite loop

reang is not a recognized term in Python development.

• reang is not a Python keyword, module, or function.

• There is no known reference or documentation for reang in Python.

• It is possible that reang is a typo or a mispronunciation of another term.

Python is a high-level programming language known for its simplicity and readability.

• Python is an interpreted language, meaning it does not need to be compiled before running.

• It has a large standard library that provides many pre-built functions and modules.

• Python supports multiple programming paradigms, including procedural, object-oriented, and functional programming.

• It is widely used in web development, data analysis, artificial intelligence, and scientific computing.

• Pytho...read more

A set is an unordered collection of unique elements in Python.

• Sets are created using curly braces or the set() function.

• Sets do not allow duplicate elements.

• Sets can perform mathematical operations like union, intersection, difference, and symmetric difference.

• Sets are mutable, meaning you can add or remove elements from a set.

• Sets are useful for removing duplicates from a list or checking for membership of an element.

Python has 35 keywords.

• Python has a set of reserved words that cannot be used as variable names or identifiers.

• These keywords are used to define the syntax and structure of the Python language.

• Examples of Python keywords include 'if', 'else', 'for', 'while', 'def', 'class', 'import', etc.

Yes, we can change the domain by updating the DNS records and configuring the web server accordingly.

• Update the DNS records to point to the new domain

• Configure the web server to recognize the new domain

• Redirect the old domain to the new domain to avoid broken links

• Update any links or references to the old domain in the codebase

Yes, I am familiar with object-oriented programming concepts and have experience with Python.

• Yes, I am familiar with object-oriented programming concepts such as classes, objects, inheritance, and polymorphism.

• I have experience using Python for various projects and tasks.

• I understand the principles of encapsulation, abstraction, and inheritance in Python.

Python benefits include simplicity, versatility, and a large community support.

• Python is easy to learn and read, making it a great language for beginners.

• Python has a wide range of applications, from web development to data analysis and machine learning.

• Python has a large and active community, providing extensive documentation, libraries, and frameworks.

• Python's simplicity and readability contribute to faster development and easier maintenance of code.

• Python supports multiple...read more

A suite in Python is a group of statements that are executed together as a single block.

• Suites are used in control structures like if, while, for, etc.

• Suites are defined by their indentation level.

• Suites can contain one or more statements.

• Suites can also be empty.

Python is used in reality due to its simplicity, versatility, and wide range of applications.

• Python is easy to learn and read, making it a popular choice for beginners.

• It has a large standard library and many third-party modules, allowing for rapid development.

• Python is used in web development, data analysis, machine learning, scientific computing, and more.

• It is cross-platform and can run on various operating systems.

• Python is also used in automation, scripting, and testing....read more

A for loop is a control flow statement that iterates over a sequence of elements and executes a block of code for each element.

• A for loop is used to iterate over a sequence such as a list, tuple, or string.

• It consists of an initialization, condition, and increment/decrement statement.

• The loop continues until the condition is false.

• The code block inside the loop is executed for each element in the sequence.

• Example: for item in my_list: print(item)