TCS Interview Questions

Tata Consultancy Services (TCS) is one of the largest and most esteemed IT services companies globally. With a reputation for selection processes, TCS interviews are known for their thoroughness in evaluating both technical and non-technical skills.

As 2025 grows, job seekers aiming to secure a position at TCS must be well-prepared for a range of questions. Here, we provide a detailed overview of the Top TCS interview questions you might encounter in 2025, categorized into technical, HR, and behavioral sections.

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Eligibility Criteria

Note: A candidate with a maximum of 1 backlog can appear for TCS interview, but at the time of joining there must not be any backlogs.

Recruitment Process

TCS conducts 4 rounds to select freshers as Assistant System Engineer in their organization.

• Written Round
• Technical Round
• Managerial Round
• HR Round

Written Round

The Written round consists of four sections and the total time allotted is 90 minutes. The four sections include:

• Quantitative Aptitude Test: The first is the Quantitative Aptitude test where the numerical and the Logical Reasoning ability sections are tested. There are 20 questions that need to be attempted in 40 minutes. There is a negative marking of 1/3rd for the questions. Important topics include Number system, Equations, Ratio and Proportion, Percentages, Profit and Loss, Time and Work, Time Speed Distance, Areas and Mensuration, Averages, Permutations and Combinations, Probability, Plane geometry, Seating Arrangements, Sets, Progressions, Functions, Series, Coding, Truth and Lie based puzzles.   Questions Related to Quantitative Aptitude Test:

Set 1,   Set 2,   Set 3,   Set 4,   Set 5,   Set 6,   Set 7,   Set 8,   Set 9,   Set 10

• Programming Language Test: This round consists of general questions from computer science and programming languages. It consists of 10 to 12 questions and the time allotted is 20 minutes. It is an MCQ round and basically consists of basic programming questions.   Questions related to MCQ round:

Set 1,   Set 2,   Set 3,   Set 4,   Set 5,   Set 6,   Set 7,   Set 8,   Set 9,   Set 10

• Coding Round: This is a technical coding round. It consists of 1 to 2 questions and the time allotted is 20 minutes. You can refer to the Practice Section to explore the questions asked in TCS.
• E-mail writing: There will be given certain clues/words using which you have to write an e-mail addressing the scenario. You have to type the e-mail in the space given. The most important thing is you have to use all the phrases given without missing even a single one. The time allotted is 10 minutes.   Questions Related to Email Writing:

Set 1,   Set 2,   Set 3,   Set 4,   Set 5,   Set 6,   Set 7,   Set 8,   Set 9,   Set 10

1. auto: This is the default storage class for all the variables declared inside a function or a block.
2. extern: Extern storage class simply tells us that the variable is defined elsewhere and not within the same block where it is used.
3. static:This storage class is used to declare static variables which are popularly used while writing programs in C language.
4. register: It declares register variables which have the same functionality as that of the auto variables.

• Pass by Value: Copy of actual variables is passed in function as a parameter.
• Pass by reference: Memory address of actual variables is passed in function as a parameter.
• Polymorphism
• Inheritance
• Encapsulation
• Abstraction

1. Single inheritance
2. Multiple Inheritance
3. Multi-level Inheritance
4. Hierarchical Inheritance
5. Hybrid Inheritance

• The left subtree of a node contains only nodes with keys lesser than the node’s key.
• The right subtree of a node contains only nodes with keys greater than the node’s key.
• The left and right subtree each must also be a binary search tree.
• There must be no duplicate nodes.
• Queue is used for BFS
• Stack is used for DFS. DFS can also be implemented using recursion (Note that recursion also uses function call stack).

1. TCS Interview Experience | Set 1 (On -Campus)
2. TCS Interview Experience | Set 2 (On-campus Recruitment Drive)
3. TCS Interview Experience | Set 3 (On-campus Recruitment Drive)
4. TCS DESS Interview Experience | Set 4 (On-campus)
5. TCS Interview Experience | Set 5 (On-campus)
6. TCS Interview Experience | Set 6 (On-campus)
7. TCS Interview Experience | Set 7 (Off-Campus)
8. TCS Interview Experience | Set 8 (On-Campus)

Conclusion

In conclusion, preparing for a TCS interview in 2025 requires a well-rounded understanding of technical concepts, problem-solving skills, and effective communication abilities.

By familiarizing yourself with these top interview questions across various domains, you can increase your chances of success in securing a position at Tata Consultancy Services. Remember, practice, preparation, and confidence are key to ace your TCS interview and embark on an exciting career journey in the world of IT.