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:* Evaluates understanding of modern API design patterns and architectural decision-making skills essential for backend or full-stack development.
Q2
Write pseudocode or explain the approach to reverse a linked list. What is the time and space complexity?
Why they ask this:* Assesses foundational data structure knowledge and ability to think through algorithms—core competencies for problem-solving in software engineering.
Q3
What is the difference between SQL and NoSQL databases? Give an example of when you'd use each.
Why they ask this:* Tests knowledge of database fundamentals and the ability to choose appropriate technologies based on project requirements.
Q4
How does version control (Git) work? Walk us through the process of creating a branch, making changes, and merging back to main.
Behavioral Questions
Q5
Tell us about a time when you had to debug a problem in your code that you couldn't solve immediately. What was your approach, and how did you resolve it?
Q6
Describe a project where you had to learn a new technology or framework on your own. How did you approach the learning process and what was the outcome?
Q7
Share an experience where you received critical feedback on your code during a code review. How did you respond and what did you learn?
Situational Questions
Q8
How would you handle a situation where you're assigned a task but realize you don't have the skills or knowledge to complete it within the deadline?
Q9
What would you do if you discovered a critical bug in production code that was introduced by a senior team member?
Q10
How would you prioritize your work if you had three tasks assigned—a bug fix, a feature request, and code refactoring—all marked as high priority?
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