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5,100 system engineer interview questions shared by candidates

Q1: Tell me about yourself. Answer: I introduced myself with my education background, skills in C++, Java, and MERN stack, highlighted my projects like Accessibility Analyzer and Emotion-Based Playlist Generator, and mentioned my problem-solving achievements on LeetCode. Q2: What is the difference between C and C++? Answer: C is a procedural programming language, while C++ is both procedural and object-oriented. C++ supports classes, objects, inheritance, polymorphism, and encapsulation which are not present in C. Q3: What is DBMS and its advantages? Answer: DBMS is software that manages data in a structured way. It reduces redundancy, ensures data integrity, supports concurrent access, and provides backup and recovery features. Q4: What are joins in SQL? Answer: Joins are used to combine rows from two or more tables. Common types are INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN. Q5: What is OOPS and explain its principles? Answer: OOPS (Object-Oriented Programming System) is based on four principles—Encapsulation, Abstraction, Inheritance, and Polymorphism—which make code modular, reusable, and maintainable. Q6: Why do you want to join TCS? Answer: TCS is one of the leading IT companies with global opportunities, strong training programs, and career growth. As a fresher, I want to start my career with a company that values learning and innovation. Q7: What was the one thing that they asked you? Answer: They asked me: “If you have programming knowledge in C++ and Java, why do you want to join a service-based company instead of a pure development company?” Answer: I explained that I want to start my career with a reputed company like TCS where I will get exposure to different domains, clients, and technologies. This will give me a strong foundation, and my programming skills will still be useful in automation, problem-solving, and project work.
avatar

Assistant System Engineer (Fresher Role)

Interviewed at Tata Consultancy Services

3.5★
Sep 4, 2025

Q1: Tell me about yourself. Answer: I introduced myself with my education background, skills in C++, Java, and MERN stack, highlighted my projects like Accessibility Analyzer and Emotion-Based Playlist Generator, and mentioned my problem-solving achievements on LeetCode. Q2: What is the difference between C and C++? Answer: C is a procedural programming language, while C++ is both procedural and object-oriented. C++ supports classes, objects, inheritance, polymorphism, and encapsulation which are not present in C. Q3: What is DBMS and its advantages? Answer: DBMS is software that manages data in a structured way. It reduces redundancy, ensures data integrity, supports concurrent access, and provides backup and recovery features. Q4: What are joins in SQL? Answer: Joins are used to combine rows from two or more tables. Common types are INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN. Q5: What is OOPS and explain its principles? Answer: OOPS (Object-Oriented Programming System) is based on four principles—Encapsulation, Abstraction, Inheritance, and Polymorphism—which make code modular, reusable, and maintainable. Q6: Why do you want to join TCS? Answer: TCS is one of the leading IT companies with global opportunities, strong training programs, and career growth. As a fresher, I want to start my career with a company that values learning and innovation. Q7: What was the one thing that they asked you? Answer: They asked me: “If you have programming knowledge in C++ and Java, why do you want to join a service-based company instead of a pure development company?” Answer: I explained that I want to start my career with a reputed company like TCS where I will get exposure to different domains, clients, and technologies. This will give me a strong foundation, and my programming skills will still be useful in automation, problem-solving, and project work.

1. Tell me about yourself. 2. Describe your final year project. 3. Code for palindrome number. 4. As I mentioned I got full marks in Physical Science in Class X, they asked about Cricket and Football ball motion physics. 5. Two math puzzles. 6. If you have any question for us.
avatar

Assistant System Engineer-Trainee

Interviewed at Tata Consultancy Services

3.5★
Apr 30, 2025

1. Tell me about yourself. 2. Describe your final year project. 3. Code for palindrome number. 4. As I mentioned I got full marks in Physical Science in Class X, they asked about Cricket and Football ball motion physics. 5. Two math puzzles. 6. If you have any question for us.

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