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TCS Software Developer Interview Questions and Answers for Freshers

Updated 2 Jul 2025

61 Interview questions

🔥 Asked by recruiter 8 times

A Software Developer was asked 1mo ago

Q. Write code to reverse a string.

Ans.

This code snippet demonstrates how to reverse a string using various programming techniques.

Using built-in functions: In Python, you can reverse a string with slicing: `reversed_string = original_string[::-1]`.
Using loops: Iterate through the string in reverse order and build a new string: `for char in original_string[::-1]: new_string += char`.
Using recursion: Define a function that calls itself with the substrin...

A Software Developer was asked 1mo ago

Q. What projects have you worked on and what technologies did you use, applying basic DSA principles?

Ans.

Discussing projects and technologies that utilize basic data structures and algorithms (DSA) in software development.

Developed a task management application using arrays to store tasks and linked lists for task prioritization.
Implemented a sorting algorithm (like QuickSort) in a project to optimize data retrieval in a database application.
Created a simple game using stacks to manage game states and queues for play...

A Software Developer was asked 2mo ago

Q. What is the difference between a HashMap and a HashSet?

Ans.

HashMap stores key-value pairs, while HashSet stores unique values without duplicates, both using hashing for performance.

Data Structure: HashMap is a map that stores key-value pairs, e.g., `HashMap<String, Integer> map = new HashMap<>();`.
Uniqueness: HashSet only stores unique values, e.g., `HashSet<String> set = new HashSet<>(); set.add("apple");`.
Null Values: HashMap allows one null key ...

A Software Developer was asked 2mo ago

Q. Explain JDK, JRE, and JVM.

Ans.

JDK, JRE, and JVM are essential components of Java programming, each serving a unique purpose in the development and execution process.

JDK (Java Development Kit): A complete toolkit for Java developers that includes the JRE, compilers, and tools for developing Java applications.
JRE (Java Runtime Environment): Provides the libraries and components necessary to run Java applications, including the JVM but not the de...

What people are saying about TCS

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a digital marketer

Do you think they're gonna work on employees' work-life balance, OR for just publicity?

Infosys, Infosys, TCS, Genpact Revise Workplace Policies Infosys is sending a warning mail, if an employee overshoots the daily limit while working remotely, the system triggers a notification Genpact introduced a new policy to log in before 11 am But will these companies really change, or is it just a show to mask their issues?

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A Software Developer was asked 2mo ago

Q. What is an IOC container in Spring Boot?

Ans.

An IoC container in Spring Boot manages object creation and dependency injection, promoting loose coupling and easier testing.

Dependency Injection: The IoC container automatically injects dependencies into classes, reducing the need for manual instantiation.
Inversion of Control: The control of object creation is inverted from the application code to the IoC container, enhancing modularity.
Bean Lifecycle Management...

A Software Developer was asked 2mo ago

Q. Explain microservice architecture.

Ans.

Microservice architecture is a design approach where applications are built as a collection of loosely coupled services.

Decentralized Data Management: Each microservice can manage its own database, allowing for flexibility and scalability. For example, an e-commerce application might have separate databases for user accounts, product inventory, and orders.
Independent Deployment: Microservices can be deployed indep...

A Software Developer was asked 3mo ago

Q. What is Python, and how is it useful in daily life?

Ans.

Python is a versatile programming language used for web development, data analysis, automation, and more in daily life.

Web Development: Frameworks like Django and Flask allow for rapid web application development.
Data Analysis: Libraries such as Pandas and NumPy enable efficient data manipulation and analysis.
Automation: Python scripts can automate repetitive tasks, like file management or data entry.
Machine Learn...

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A Software Developer was asked 3mo ago

Q. Elements in an aray

Ans.

An array is a collection of elements, typically of the same data type, stored in contiguous memory locations.

Arrays can hold multiple values in a single variable, e.g., ['apple', 'banana', 'cherry'].
They are zero-indexed, meaning the first element is accessed with index 0.
Arrays can be multidimensional, such as a 2D array: [['a', 'b'], ['c', 'd']].
Common operations include traversal, insertion, deletion, and searc...

A Software Developer was asked 3mo ago

Q. Write a program to swap two elements in an array.

Ans.

Swapping elements in an array involves exchanging the positions of two specified elements.

Identify the indices of the elements to swap. Example: For array [1, 2, 3], to swap 1 and 3, use indices 0 and 2.
Use a temporary variable to hold one of the elements during the swap. Example: temp = array[i]; array[i] = array[j]; array[j] = temp;
Ensure the indices are valid to avoid errors. Example: Check if indices are withi...

A Software Developer was asked 11mo ago

Q. What is the use of a circular linked list?

Ans.

Circular linked list is a linked list where the last node points back to the first node, forming a circle.

Allows for efficient traversal from the end of the list to the beginning
Useful for applications where data needs to be accessed in a circular manner, such as round-robin scheduling
Can be used to implement a circular buffer in data structures

TCS Software Developer Interview Experiences for Freshers

84 interviews found

Software Developer Interview Questions & Answers

Anonymous

posted on 1 Aug 2024

Interview experience

Good

Difficulty level

Moderate

Process Duration

Less than 2 weeks

Result

Not Selected

I applied via Campus Placement and was interviewed in Jul 2024. There were 3 interview rounds.

Round 1 - Aptitude Test

English,Quants and reasoning

Round 2 - Coding Test

2 coding one medium one hard

Round 3 - Technical

(4 Questions)

Q1. Explain your project with technology that you have used

Ans.

Developed a web application using React.js and Node.js to manage inventory and sales data

Used React.js for front-end development
Utilized Node.js for back-end development
Implemented RESTful APIs for communication between front-end and back-end
Integrated MongoDB for database management

Answered by AI

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Q2. What's enum class?

Ans.

Enum class is a strongly-typed class that defines a set of named constants.

Enum class is introduced in C++11 to provide type-safe enums.
It allows defining a set of named constants that can be used as values.
Each constant in an enum class is treated as a separate type, preventing type mismatches.
Example: enum class Color { RED, GREEN, BLUE };
Example: Color c = Color::RED;

Answered by AI

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Q3. What's class and object?

Ans.

A class is a blueprint for creating objects in object-oriented programming. An object is an instance of a class.

A class defines the properties and behaviors of objects.
An object is a specific instance of a class.
Classes can be thought of as templates, while objects are the actual instances created from those templates.
Example: Class 'Car' may have properties like 'color' and 'model', while an object of class 'Car' coul...

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Q4. What is the use of circular linked list

Ans.

Circular linked list is a linked list where the last node points back to the first node, forming a circle.

Allows for efficient traversal from the end of the list to the beginning
Useful for applications where data needs to be accessed in a circular manner, such as round-robin scheduling
Can be used to implement a circular buffer in data structures

Answered by AI

Add your answer

Interview Preparation Tips

Interview preparation tips for other job seekers - Please read oops and dbms also keep full knowledge of your project from scratch

Skills evaluated in this interview

Software Developer Interview Questions & Answers

Anonymous

posted on 14 Jun 2024

Interview experience

Excellent

Difficulty level

Moderate

Process Duration

2-4 weeks

Result

Not Selected

I applied via Company Website and was interviewed in May 2024. There were 2 interview rounds.

Round 1 - Technical

(4 Questions)

Q1. How node.js works?

Ans.

Node.js is a runtime environment that allows you to run JavaScript on the server side.

Node.js uses an event-driven, non-blocking I/O model, making it lightweight and efficient.
It is built on the V8 JavaScript engine from Google Chrome.
Node.js allows you to easily build scalable network applications.
Example: Creating a simple HTTP server in Node.js - const http = require('http'); http.createServer((req, res) => { res....

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Q2. What is Event Emitter ?

Ans.

Event Emitter is a class in Node.js that allows objects to subscribe to events and be notified when those events occur.

Event Emitter is a core module in Node.js
It allows multiple objects to listen for and respond to events
Objects can emit events using the 'emit' method
Listeners can be added using the 'on' method
Example: const EventEmitter = require('events');

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Q3. Tell me about event loop?

Ans.

Event loop is a mechanism that allows for asynchronous programming by handling events and callbacks.

Event loop is a single-threaded mechanism used in programming languages like JavaScript to handle asynchronous operations.
It continuously checks the call stack for any functions that need to be executed, and processes them in a non-blocking manner.
Event loop allows for efficient handling of I/O operations, timers, and ca...

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Q4. Questions related to my projects.

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Round 2 - HR