TCS

Large multinational IT services and consulting enterprise based in India.

3 Rounds ~14 Days Medium

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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

All Roles Backend Engineer 35 Cloud Engineer 34 Data Engineer 35 Data Scientist 35 DevOps Engineer 35 Frontend Engineer 35 Full Stack Engineer 35 Machine Learning Engineer 35 Product Manager 35 Software Engineer 35

All Topics Algorithms 9 System Design 5 Culture Fit 4 Spring Boot 4 Core Java 4 SQL 3 DBMS 2 Design Patterns 1

Software Engineer • Behavioral • easy

TCS operates across multiple locations and time zones. Are you willing to relocate to any TCS development center and work in rotational shifts if the project demands it?

#Adaptability #Flexibility #HR

Practice

Software Engineer • Behavioral • easy

Why do you want to join TCS over other IT service-based companies or product-based startups?

#Company Knowledge #Motivation #HR

Practice

Software Engineer • Behavioral • medium

Describe a time when you had a disagreement with a team member or manager regarding a technical decision. How did you resolve it?

#Conflict Resolution #Communication #Teamwork

Practice

Software Engineer • Behavioral • medium

TCS often requires engineers to work on legacy systems and perform maintenance tasks. How do you feel about maintaining and refactoring older codebases?

#Adaptability #Patience #Mindset

Practice

Software Engineer • Behavioral • easy

What is your understanding of the Tata Group's core values, and how do you align with them?

#Company Values #Integrity #HR

Practice

Software Engineer • Coding • medium

Write a Java 8 program using Streams to find the second highest number in an array of integers.

#Java 8 #Streams API #Arrays

Practice

Software Engineer • Coding • medium

Write a SQL query to find the 3rd highest salary of an employee from the 'Employee' table without using the LIMIT keyword.

#SQL Queries #Subqueries #Database

Practice

Software Engineer • Coding • medium

Write a program to reverse a string without using inbuilt functions, ensuring that special characters remain in their exact original positions.

#Strings #Two Pointers #Data Structures

Practice

Software Engineer • Coding • medium

Write a program to detect a loop (cycle) in a singly linked list.

#Linked List #Floyd's Cycle-Finding Algorithm #Pointers

Practice

Software Engineer • Coding • easy

Find the first non-repeating character in a given string and return its index. If it doesn't exist, return -1.

#Strings #Hash Map #Arrays

Practice

Software Engineer • Coding • hard

Given two sorted arrays, merge them into a single sorted array without using any extra space (O(1) auxiliary space).

#Arrays #Sorting #Math

Practice

Software Engineer • Coding • easy

Write a SQL query to find all duplicate rows in a table based on a specific column (e.g., email).

#GROUP BY #HAVING #Data Cleaning

Practice

Software Engineer • Coding • easy

Given an array of integers and a target sum, return the indices of the two numbers that add up to the target. (Two Sum problem)

#Arrays #Hash Map

Practice

Software Engineer • Coding • easy

Write a program to print the Fibonacci series up to N terms using recursion.

#Recursion #Math #Basic Programming

Practice

Software Engineer • Coding • easy

Write a function to check if two given strings are anagrams of each other.

#Strings #Sorting #Hash Map

Practice

Software Engineer • Coding • easy

Given an array of size N containing distinct numbers in the range from 1 to N+1, find the single missing number.

#Arrays #Math #Bit Manipulation

Practice

Software Engineer • Coding • medium

Write a program to find the longest palindromic substring in a given string.

#Strings #Dynamic Programming #Expand Around Center

Practice

Software Engineer • System Design • medium

What is the API Gateway pattern in Microservices? What cross-cutting concerns does it handle?

#Microservices #API Gateway #Security

Practice

Software Engineer • System Design • hard

In a microservices architecture, how do you handle transaction management across multiple independent services?

#Microservices #Distributed Systems #Saga Pattern

Practice

Software Engineer • System Design • medium

Design a scalable URL shortener service like Bitly. Focus on the database schema and the algorithm used to generate the short URL.

#Scalability #Database Design #Hashing

Practice

Software Engineer • System Design • hard

How would you design an e-commerce checkout system that can handle massive spikes in traffic during a flash sale without crashing?

#High Availability #Message Queues #Load Balancing

Practice

Software Engineer • System Design • hard

Design a centralized logging and monitoring system for a distributed microservices architecture.

#Observability #Logging #Microservices

Practice

Software Engineer • Technical • easy

Explain the ACID properties in the context of Database Management Systems.

#Transactions #Database Theory

Practice

Software Engineer • Technical • easy

Explain the difference between an Abstract Class and an Interface in Java. What changes were introduced in Java 8 regarding interfaces?

#Object-Oriented Programming #Java #Interfaces

Practice

Software Engineer • Technical • medium

How does Spring Boot auto-configuration work under the hood? Explain the role of the @SpringBootApplication annotation.

#Spring Boot #Annotations #Auto-configuration

Practice

Software Engineer • Technical • medium

Explain the internal working of a HashMap in Java. What specific optimization was introduced in Java 8 to handle frequent hash collisions?

#Collections Framework #Data Structures #Hashing

Practice

Software Engineer • Technical • easy

Explain the exact differences between TRUNCATE, DELETE, and DROP commands in SQL.

#DDL #DML #Database Management

Practice

Software Engineer • Technical • medium

What are the different types of memory areas allocated by the JVM? Where are objects and local variables stored?

#JVM #Memory Management #Garbage Collection

Practice

Software Engineer • Technical • medium

Explain the Singleton design pattern. How do you ensure that a Singleton class is completely thread-safe in a multithreaded environment?

#Design Patterns #Multithreading #Core Java

Practice

Software Engineer • Technical • easy

In Spring Boot, what is the difference between the @RestController and @Controller annotations?

#Spring MVC #REST APIs #Annotations

Practice

Software Engineer • Technical • medium

What is the difference between fail-fast and fail-safe iterators in Java? Give an example of each.

#Collections #Iterators #Concurrency

Practice

Software Engineer • Technical • medium

Explain the concepts of Dependency Injection (DI) and Inversion of Control (IoC) in the Spring framework.

#Spring Core #Architecture #Design Principles

Practice

Software Engineer • Technical • medium

Explain the difference between clustered and non-clustered indexes in a relational database.

#Indexing #Performance Tuning #SQL

Practice

Software Engineer • Technical • medium

How do you implement global exception handling in a Spring Boot REST API?

#Exception Handling #REST APIs #Annotations

Practice

Software Engineer • Technical • easy

What are the primary differences between REST and SOAP web services?

#APIs #Protocols #Architecture

Practice

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Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

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