TCS Interview Questions and Answers for Freshers 2026
TCS interviews more freshers than almost any other company in India — which means the selection process is well-documented and predictable. Once you know what to expect at each stage, preparation becomes much more focused. Here's everything you need to walk in confident and ready.
TCS Selection Process Overview
Stage 1
Online Test
Stage 2
Technical Interview
Stage 3
Managerial Round
Stage 4
HR Interview
Common Technical Interview Questions
Q1
What are the four pillars of OOP?
Encapsulation (bundling data and methods), Abstraction (hiding implementation), Inheritance (child class reuses parent properties), and Polymorphism (same method, different behavior).
Q2
What is the difference between an Array and a Linked List?
An array stores elements in contiguous memory with O(1) access by index. A linked list uses nodes connected by pointers with O(n) access but O(1) insertion/deletion at the beginning.
Q3
What is a deadlock in Operating Systems?
A deadlock occurs when two or more processes are each waiting for a resource held by the other, causing all of them to be stuck indefinitely.
Q4
What is normalization in databases?
Normalization organizes data to reduce redundancy. 1NF removes repeating groups, 2NF removes partial dependencies, 3NF removes transitive dependencies.
Q5
What is the difference between TCP and UDP?
TCP is connection-oriented, reliable, and ensures data delivery in order (used for web, email). UDP is connectionless, faster, but does not guarantee delivery (used for video, gaming).
Q6
What is a JOIN in SQL? Name the types.
JOIN combines rows from two or more tables. Types: INNER JOIN (matching rows only), LEFT JOIN (all from left + matching right), RIGHT JOIN (all from right + matching left), FULL OUTER JOIN (all rows from both tables).
Q7
What is a RESTful API?
A REST API uses HTTP methods (GET, POST, PUT, DELETE) to allow communication between client and server. It is stateless — each request contains all the information needed.
Q8
Write a program to reverse a string.
In Java: new StringBuilder(str).reverse().toString(). In Python: str[::-1]. In C: use a loop to swap characters from both ends.
Common HR Interview Questions
Tell me about yourself.
Use the Present-Past-Future framework: your current skills, your education/projects, and why you want this role at TCS.
Why do you want to join TCS?
Mention TCS's scale, learning culture, global projects, and reputation for developing technology professionals.
Are you willing to relocate?
Be honest. If yes, say so clearly. If there are preferences, mention them politely.
Where do you see yourself in 5 years?
Express a desire to grow technically, take on more responsibility, and contribute to larger projects within TCS.
What are your strengths and weaknesses?
For strengths, pick something relevant (e.g., problem-solving). For weaknesses, mention something you actively work to improve.
Tips to Crack TCS Interview
- Master OOP concepts in at least one language (Java or C++)
- Practice aptitude: quantitative, logical, and verbal reasoning daily
- Know your resume — anything written on it can be asked
- Prepare a strong “Tell me about yourself” answer
- Practice mock interviews on Roundexa.com for real feedback
- Revise DBMS, OS, and networking fundamentals
Final Thoughts
TCS interviews are structured and predictable if you prepare consistently. Focus on OOP, basic DSA, SQL, and strong communication. Practice your HR answers regularly and walk into the interview with confidence. Visit Roundexa.com to practice AI mock interviews tailored to your skills and target role.
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