Fresher / Entry leveltech

Software Engineer
Interview Questions

Covering TCS Software Engineer interview questions — TCS NQT, technical, and HR round prep.. Free, no signup required.

10 questions ready

Technical Questions
Q1
Explain the difference between REST and GraphQL APIs. When would you choose one over the other in a real-world application?
Why they ask this:* They want to assess your understanding of modern API design patterns and your ability to make architectural decisions based on project requirements.
Q2
Write pseudocode or explain how you would reverse a linked list. Walk through your approach and discuss the time and space complexity.
Why they ask this:* They're evaluating your fundamental data structures knowledge, problem-solving methodology, and ability to analyze algorithm efficiency—core skills for any software engineer.
Q3
What is the purpose of version control systems like Git, and what's the difference between `git merge` and `git rebase`?
Why they ask this:* They need to confirm you understand collaborative development workflows and can manage code changes responsibly in a team environment.
Q4
Describe the Model-View-Controller (MVC) architecture. How does it help in organizing a web application?
Behavioral Questions
Q5
Tell me about a time when you had to debug a problem in your code that took longer than expected. What was the situation, what steps did you take to solve it, and what did you learn?
Q6
Describe a project where you had to learn a new programming language or framework quickly. How did you approach the learning process, and what was the outcome?
Q7
Give an example of when you received critical feedback on your code during a code review. How did you respond, and how did it improve your work?
Situational Questions
Q8
How would you handle a situation where you've been assigned a task with a deadline you believe is unrealistic, and you're unsure if you can deliver quality work in that timeframe?
Q9
What would you do if you discovered a critical bug in production code that was introduced by a senior engineer on your team?
Q10
How would you approach a feature request that conflicts with the current system architecture and would require significant refactoring to implement properly?
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