T

Tata Consultancy Services Interview Guide

For Freshers — India 2026

Medium Difficulty💰 ₹3.36–7 LPA👥 40,000+ freshers/year📝 6 Questions

About the TCS Interview Process

TCS is India's largest IT employer and hires over 40,000 freshers annually through its National Qualifier Test (NQT). The process is structured and predictable — prepare for aptitude, coding, and basic CS fundamentals.

Interview Rounds

  1. 1TCS NQT (Online Test)
  2. 2Technical Interview
  3. 3HR Interview

Insider Tips to Crack TCS

  • ✓Practice TCS NQT mock tests on the official TCS iON portal
  • ✓Focus on quantitative aptitude, verbal ability, and reasoning
  • ✓Prepare 1–2 Java/Python programs (arrays, strings, recursion)
  • ✓Know your resume cold — every point will be questioned
  • ✓TCS HR round is mostly formality; be confident and concise

TCS Interview Questions & Answers

Q1. What is the difference between process and thread?

Technical

Model Answer:

A process is an independent program in execution with its own memory space. A thread is a lightweight unit within a process that shares the process's memory. Multiple threads in a process can run concurrently, making threads faster to create and switch between than processes.

Q2. Explain OOPS concepts with examples.

Technical

Model Answer:

OOP has four pillars: (1) Encapsulation — bundling data and methods (e.g., a BankAccount class hiding balance); (2) Inheritance — child class inherits parent properties (Car extends Vehicle); (3) Polymorphism — same interface, different behavior (method overloading/overriding); (4) Abstraction — hiding implementation details (abstract classes/interfaces).

Q3. Reverse a string without using built-in functions.

Coding

Model Answer:

Use two pointers (start and end), swap characters moving inward: ```python def reverse(s): s = list(s) l, r = 0, len(s)-1 while l < r: s[l], s[r] = s[r], s[l] l += 1; r -= 1 return "".join(s) ```

Q4. Tell me about yourself.

HR / Behavioral

Model Answer:

Structure: Name → Degree & College → Key skills/projects → Why TCS. Keep it under 90 seconds. End with: 'I'm excited about TCS because of its scale — working on projects that impact millions of users is a unique learning opportunity.'

Q5. What is your expected salary?

HR / Behavioral

Model Answer:

For TCS NQT: Ninja track is ₹3.36 LPA, Digital track is ₹7 LPA. Say: 'I understand TCS has structured packages based on the track I qualify for. I'm focused on the learning opportunity and am flexible on compensation.'

Q6. Find the second largest element in an array.

Aptitude

Model Answer:

Traverse once: maintain two variables max1 and max2. If current > max1, update max2 = max1 then max1 = current. Else if current > max2 and current != max1, update max2. O(n) time, O(1) space.

Also Prepare For

I

Infosys

₹3.6–9 LPA

W

Wipro

₹3.5–6.5 LPA

C

Cognizant

₹4–7.5 LPA

H

HCL

₹3.5–6 LPA

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