TCS Digital Interview Questions 2026: 30 Technical, Managerial and HR Questions with Answers

TCS Digital is the middle profile in TCS fresher hiring: better paid than Ninja, less demanding than Prime, and the one most 2026-batch candidates with a decent NQT coding score are actually called for. This page covers how the Digital interview runs in 2026, what the panel looks for, and 30 questions across the technical, managerial and HR rounds with sample answers you can adapt.

The Digital interview is where candidates who prepared only for aptitude get caught. The test got you here; the interview checks whether you can code, explain a project and hold a conversation about real work.

How the TCS Digital process works in 2026

As of September 2026, all TCS fresher profiles come through one integrated NQT. There is no separate Digital test; your score in Part B (advanced quantitative reasoning plus the 90-minute advanced coding section with two to three problems) decides whether you are considered for Ninja, Digital or Prime. TCS publishes no cut-offs.

Eligibility. B.E./B.Tech/M.E./M.Tech/MCA/M.Sc in the listed streams, minimum 60 percent across Class X, XII and graduation, no active backlogs, and at most a one-year academic gap. The criteria are the same for all three profiles.

Interview structure. A 2026 on-campus experience published on GeeksforGeeks describes three rounds on the same day at TCS premises: technical, managerial and HR. Campus Monk's 2026 write-up reports the same three rounds and lists the actual questions, including a live coding task to return the second-largest element, SQL queries, networking fundamentals, Spring Boot basics and a project deep-dive. Off-campus interviews run on TCS's video platform and may split the rounds across days.

Duration. Thirty to forty minutes for the technical round, fifteen to twenty for MR and ten to fifteen for HR. When one panel covers everything, expect 40 to 50 minutes total.

Compensation. Not published on the official page. Candidate-reported figures compiled by PapersAdda put Digital at about 7 LPA, with Ninja at 3.36 to 3.6 LPA and Prime at 9.17 to 11.5 LPA; the article marks them unverified. Ask your placement cell for the current letter.

Profile changes after the interview. A weak Digital interview can end in a Ninja offer, and a strong one occasionally in a Prime call-back. The profile in your shortlist mail is provisional.

What the TCS Digital interviewer is testing

• One coding problem, live. Arrays, strings, basic recursion. They want a working solution and a clear explanation, not the optimal one on the first try.
• Language fundamentals. OOP concepts in the language on your resume, with examples, not definitions.
• Database basics. Joins, keys, a query written by hand, normalisation in plain words.
• Your project. Why you built it that way, what you personally did, and what you would change.
• Awareness of the stack TCS works with. Spring Boot, cloud basics, REST APIs, Git. You do not need depth, but "never heard of it" is a bad answer for a Digital profile.
• Attitude and flexibility in the MR and HR rounds: relocation, shifts, learning a new stack, staying past the service agreement.

30 TCS Digital interview questions with sample answers

Technical round: coding

1. Write code to return the second-largest element in an array. (asked in a 2026 Digital interview)

"I keep two variables, first and second, both starting at negative infinity. For each number, if it is greater than first, I move first into second and update first; otherwise if it is greater than second and different from first, I update second. At the end, if second is still the sentinel, there was no distinct second element. One pass, O(n) time, O(1) space, and it handles duplicates like [5, 5, 3] correctly by returning 3."

2. Reverse the words in a sentence without using library reverse functions.

"Split on spaces into a list, then swap elements from both ends towards the middle, and join with a single space. If the interviewer wants in-place on a character array, I would reverse the whole array first, then reverse each word individually. Both are O(n). I would mention trimming multiple spaces because that is the usual edge case."

3. Check whether two strings are anagrams.

"Sort both and compare is O(n log n) and one line. Better is a frequency count: an integer array of size 26 for lowercase letters, increment for the first string, decrement for the second, and check all zeros. O(n) time, O(1) space. I would ask whether case and spaces matter before coding."

4. Print the Fibonacci series up to n and tell me the complexity.

"Iteratively with two variables, O(n) time and O(1) space. The naive recursive version is O(2^n) because it recomputes subproblems; memoisation brings it back to O(n). I mention that because interviewers often follow up with 'now do it recursively' to see if I know why recursion is slow here."

5. Find the missing number in an array containing 1 to n with one number absent.

"Sum of 1 to n is n(n+1)/2; subtract the array sum. O(n) time, O(1) space. If overflow is a concern, XOR all numbers from 1 to n with all array elements; pairs cancel and the missing number remains. I would say both and note that the XOR version is safer for large n."

6. Write a SQL query to find employees earning more than their department's average.

"SELECT e.name, e.salary FROM employees e JOIN (SELECT dept_id, AVG(salary) AS avg_sal FROM employees GROUP BY dept_id) d ON e.dept_id = d.dept_id WHERE e.salary > d.avg_sal; The derived table computes the average once per department. A correlated subquery in the WHERE clause also works but recomputes per row; I would mention that trade-off."

7. What is the difference between == and .equals() in Java?

"== compares references for objects and values for primitives; .equals() compares logical content if the class overrides it. new String("a") == new String("a") is false, .equals() is true. String literals from the pool can make == true by accident, which is why relying on it is a bug waiting to happen."

Technical round: core concepts

8. Explain the four pillars of OOP with an example from your project.

"Encapsulation: my User class kept the password hash private and exposed verifyPassword(). Abstraction: the service layer exposed placeOrder() without callers knowing about inventory checks. Inheritance: AdminUser extended User for role fields. Polymorphism: a NotificationSender interface with email and SMS implementations chosen at runtime. Tying each pillar to code I wrote is what the interviewer wants to hear."

9. What is normalisation? Explain up to 3NF in plain words.

"1NF: every cell holds one value, no repeating groups. 2NF: every non-key column depends on the whole primary key, not part of it. 3NF: non-key columns depend only on the key, not on other non-key columns. In my project I split customer_city out of the orders table into a customers table because city depended on the customer, not on the order."

10. Difference between primary key, unique key and foreign key.

"A primary key uniquely identifies a row and cannot be null; one per table. A unique key also enforces uniqueness but allows one null in most databases, and a table can have several. A foreign key references a primary or unique key in another table and enforces referential integrity, so you cannot insert an order for a customer that does not exist."

11. What is the difference between TCP and UDP?

"TCP is connection-oriented, ordered and reliable, with retransmission and flow control; HTTP, email and file transfer use it. UDP is connectionless with no delivery guarantee but lower latency; DNS, video streaming and games use it. If asked which I would pick for a chat application, TCP for messages, and possibly UDP for voice."

12. What is an API, and what does REST mean?

"An API is a contract for one program to call another. REST is a style for HTTP APIs: resources identified by URLs, standard verbs (GET to read, POST to create, PUT to update, DELETE to remove), stateless requests and status codes for results. In my project GET /api/complaints/12 returned one complaint as JSON and POST /api/complaints created one."

13. What do you know about Spring Boot? (asked in a 2026 Digital interview)

"It is the standard way to build Java backends: auto-configuration, an embedded Tomcat so the app runs as a jar, starters that pull in dependencies, and annotations like @RestController and @Service for the layers. I built my project's API with it, using Spring Data JPA for the database layer." If you have not used it, say so and describe what you have used; do not bluff.

14. Explain the difference between an abstract class and an interface.

"An abstract class can have state and implemented methods and supports single inheritance; an interface defines a contract, and a class can implement many. Since Java 8 interfaces can have default methods, so the practical rule is: interface for a capability, abstract class for shared code among related classes."

15. What is exception handling, and what is the difference between checked and unchecked exceptions?

"Exception handling separates error paths from normal flow with try, catch and finally. Checked exceptions such as IOException must be declared or handled at compile time; unchecked ones such as NullPointerException extend RuntimeException and need not be. I would catch specific exceptions, never a bare Exception, and never swallow one silently."

16. What is cloud computing, and have you used any cloud service?

"Renting compute, storage and services on demand instead of owning servers, billed by usage. I deployed my project on a free-tier virtual machine and used object storage for uploads." Name what you actually touched, even if it is a free tier. Digital panels ask this to check basic awareness, not certification depth.

Technical round: project

17. Explain your final-year project in two minutes.

Problem, users, stack, your part, result. "Hostel students filed complaints on paper and nothing was tracked. I built a web app where students file complaints, wardens assign them and everyone sees status. React front end, Spring Boot API, Postgres. I designed the schema and wrote the API; a teammate did the UI. The warden's office used it for one semester and the average resolution time dropped from about a week to two days." See the final-year project guide for a full structure.

18. Why did you choose that database or framework?

Give a real reason, even a modest one. "I chose Postgres because the data was relational, complaints belong to students and hostels, and I wanted foreign keys enforced. MongoDB would have been fine too, but I did not want to handle referential integrity in code."

19. What was the hardest bug in your project?

Pick one with a cause you understood. "Complaints sometimes appeared twice. The cause was a double form submission on slow networks. I disabled the button after the first click and added a unique constraint on student, title and timestamp on the server, because the client-side fix alone was not enough."

20. What would you add if you had another month?

"Notifications through email when a complaint status changes, and role-based access with proper authorisation checks on every endpoint, which I only partially did. I would also write integration tests for the API because I found the duplicate bug manually and should have caught it in a test."

Managerial round

21. Do you have any location preferences? (asked in a 2026 Digital interview)

"I prefer Pune or Hyderabad, but I am fine with any TCS location in India. My family knows I may be posted anywhere." Preference is fine; a hard refusal is not.

22. How many family members do you have, and are they okay with you relocating?

The manager is checking for constraints that turn into attrition. "Four: parents and a younger sister. My parents are comfortable with me relocating; my father worked in a different city for years, so this is normal for us."

23. What will you do if you are put on a project with a technology you have never used?

"Treat the first two weeks as learning: TCS's internal courses, the project documentation and pairing with a senior. I picked up Spring Boot in a month for my project starting from zero, so I know how to do it. I would tell my lead honestly where I am so they can plan tasks accordingly."

24. Tell me about a time you worked under a tight deadline.

Use STAR. "Our project review was moved up by ten days. I listed the remaining work, cut two nice-to-have features, and we split the rest by module with a daily fifteen-minute call. We demoed on time and added the dropped features the following month."

25. Are you planning higher studies or preparing for GATE or CAT?

"No. I want industry experience first; if I do a master's later it would be part-time and sponsored." If you are preparing for something, do not lie, but understand that the manager will weigh it.

HR round

26. Tell me about yourself.

Sixty to ninety seconds: education, strongest skill with proof, project in one line, why TCS. Practise it aloud until it stops sounding memorised. The tell me about yourself guide has fresher templates.

27. What do you know about TCS?

Say three current things: the size and Tata parentage, a recent large deal or platform from the TCS newsroom, and the profiles you are interviewing for. Read the newsroom the morning of the interview so at least one fact is from this month.

28. Why did you choose this college and this branch?

"I chose computer science because I enjoyed programming in school, and the college because it was the best I could get with my rank and had good placement support." Honest and short; nobody expects a story.

29. What are your strengths and weaknesses?

One strength with proof, one real weakness with a fix in progress. "Strength: I finish what I start; I kept my project going when two teammates got placed and left. Weakness: I over-prepare before speaking up, so I sometimes stay quiet in discussions. I have been forcing myself to ask one question in every meeting." The weaknesses guide has more examples.

30. Are you comfortable with the service agreement, shifts and any location?

"Yes. I have read the terms, I am fine with shifts if a project needs them, and I can relocate anywhere in India." Keep this consistent with what you told the MR panel; they compare notes.

Mistakes that get Digital candidates downgraded or rejected

• Not being able to code the one problem. Digital panels ask exactly one; failing it usually means Ninja or nothing.
• A project explained as a team story with no personal part. "We built" with no "I did" is the most common reason for a downgrade.
• Definitions without examples. Every OOP or DBMS question should end with "in my project, ...".
• Bluffing about Spring Boot, cloud or AI. Panels probe one level deeper than you expect. Say what you have used.
• Contradictions between rounds on location, offers, or higher studies.
• Asking about salary or leave before the HR round.

How to practise the TCS Digital interview

The Digital interview rewards three things you cannot get from reading: coding a problem while talking, explaining a project to someone who interrupts, and answering situational questions calmly. All three need practice with feedback.

In MockMate Practice, attach your resume and paste the TCS role text, pick a technical round, and run an adaptive session in the browser. The interviewer persona asks a coding problem you solve in the built-in editor, follows up on your project the way a real panel does, and adds pressure on weak answers. The report shows each answer, response timing, coaching evidence and recurring weaknesses, with a recommended next practice. Eligible accounts get three free Practice starts of up to ten minutes each as of September 2026. Use MockMate Live assistance only in interviews or meetings where the organisation or interviewer permits it; TCS selection rounds do not permit it, so stay with Practice for this interview.

A one-week plan: two coding problems a day from arrays and strings, spoken aloud; one evening rewriting the project story with a hardest-bug section; one Practice round on day four, read the report, fix the two weakest answers, and a second round on day six. For MR-specific questions see the TCS managerial round page; for how Digital compares with the other profiles, the Ninja and Prime pages.