How Tata Consultancy Services (TCS) Interviews in 2026: Process, Questions & What They Score

• What are the four basic principles of OOPS (abstraction, encapsulation, polymorphism, inheritance)?Tests the four OOP pillars, abstraction, encapsulation, inheritance and polymorphism; asked in two independent sources.
• What is polymorphism?Tests whether the candidate can define polymorphism on its own, separate from naming the OOP pillars.
• Explain the difference between overloading and overriding.Tests compile-time versus runtime dispatch: method overloading versus overriding.
• What is a static variable, and what is a static method in Java?Tests class-level state and methods versus instance-level members in Java.
• What is the difference between JDK, JRE and JVM?Tests knowledge of the Java build, runtime and execution layers and how they relate.
• Explain exception handling with an example, and what is the use of the finally block?Tests try-catch-finally control flow and cleanup-on-exit reasoning.
• What is the difference between an exception and an error?Tests whether the candidate separates recoverable exceptions from unrecoverable JVM errors.
• What is the difference between a primary key and a foreign key?Tests relational schema design: entity identity versus cross-table referential integrity.
• What is normalization, and what is the difference between the normal forms?Tests DB normalization across 1NF, 2NF and 3NF; two campus accounts report panels pushing past the definition.
• Explain the difference between DROP, TRUNCATE and DELETE.Tests SQL DDL versus DML distinctions: schema removal, table reset, row-level deletes.
• What are ACID properties, and what is a transaction in a database?Tests transaction guarantees: atomicity, consistency, isolation, durability.
• What is a linked list, and how do you detect and remove a loop in one?Tests pointer-based data structures and cycle detection, typically Floyd's algorithm.
• Explain the OSI model.Tests knowledge of the seven-layer networking model and each layer's role.
• What are interrupts, and what is the RR (round robin) scheduling algorithm in an operating system?Tests OS fundamentals: hardware interrupt handling and time-sliced round robin scheduling.
• What are RESTful APIs, and what is the difference between GET and POST requests?Tests REST API semantics and GET versus POST differences; followed by a Node.js vs Express.js question.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

• Write the logic on paper to reverse a string, multiply two matrices, and print the nth prime number.Tests basic algorithmic logic on paper: string reversal, matrix multiplication, prime generation.
• Given two tables, write an SQL query to find the emp_id of employees who have the same salary.Tests SQL self-joins or grouping to match rows sharing a column value.
• Write a query to get the third largest salary from a table.Tests SQL ordering and subquery or window-function technique for nth-highest retrieval.
• Write an SQL query to get the total number of students in each department.Tests SQL GROUP BY aggregation to count rows per category.
• Swap two variables without using a third variable, and then without using arithmetic operators.Tests arithmetic and bitwise XOR tricks for in-place swapping without temp storage.
• Build a simple HTML form for a voter ID card that accepts name and age and rejects users under 18.Tests basic HTML form building plus client-side age validation logic.
• Design a database for a college.Tests schema design judgment: entities, relationships and normalization for a real domain.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

• Describe your projects.
• What about your project, why did you choose this project, and could it have been done another way?Tests engineering judgment on design trade-offs; the alternatives follow-up is where candidates struggle most.
• What are the core subjects you are getting in your branch?
• Tell me about your internship.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

• Explain the software development lifecycle.Tests knowledge of software development lifecycle phases and their sequencing.
• How does a server handle multiple simultaneous transactions, and does performance degrade under heavy load?Tests concurrency and scalability reasoning about simultaneous transaction handling.
• How does Facebook manage its data, and how is big data stored and managed in organizations?Tests big data infrastructure awareness: storage, distribution and management at scale.
• How does Google rank search results, and how do you differentiate advertised products from organic search results?Tests understanding of search ranking systems and separating ads from organic results.
• If you are given a tedious job at TCS that you don't like, what would you do? And if you had to learn something you are not aware of, what would you do?
• Are you willing to work in shifts, including night shifts, and are you comfortable with any working hours?

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

• Tell me something about yourself.
• Why do you want to join TCS?
• Who is the CEO of TCS, and how many employees work at TCS?
• Why should we hire you, and what three qualities make you a good fit for this job?
• Explain your strengths with examples, and what are your weaknesses and the steps you take to overcome them?
• Where do you see yourself five years from now?
• Are you open to relocation and comfortable with any location, for example moving from Lucknow to Chennai?
• Here is a water bottle. Tell me a story about it. You have 30 seconds to think.

Tata Consultancy Services (TCS)'s process has 9 stages, in order: Application and NQT registration, TCS National Qualifier Test (online), Result, scorecard and track allocation (Ninja / Digital / Prime), Shortlist and interview scheduling, Technical interview, Managerial interview, HR interview, Document verification via the iBegin portal, Offer letter release.

Tata Consultancy Services (TCS) does not have a publicly documented, named interview framework. Treat any informally reported evaluation themes as directional, not official.

Tata Consultancy Services (TCS)'s question bank spans 5 categories: Programming and CS fundamentals; Coding and SQL exercises; Projects and resume deep dive; Managerial and scenario; HR, motivation and fit.

This playbook is medium confidence, compiled from 16 public sources, and last verified September 6, 2026. It describes one well-documented shape of Tata Consultancy Services (TCS)'s interviews, not a guarantee of what any individual loop will look like.