💡 IT Interview Tip: For technical roles, 60% of your prep should be DSA + system design. For non-technical IT roles (BA, QA, PM), focus on domain knowledge and process understanding.
🔥 Most Common IT Interview Questions
Tell me about a project you built end-to-end.
Describe: the problem it solved, tech stack chosen and why, biggest technical challenge and how you overcame it, and the outcome (users, performance metrics). Never describe a tutorial project as your own work — interviewers detect this immediately.
How do you approach debugging a production issue?
Structured answer: 1) Check logs immediately (application log, server log, database log). 2) Reproduce in staging if possible. 3) Identify the last deployment or config change. 4) Isolate the failing component. 5) Fix, test, deploy. 6) Post-mortem to prevent recurrence. This shows systematic thinking.
Explain REST vs GraphQL.
REST: resource-based endpoints, multiple requests for related data, cacheable. GraphQL: single endpoint, client specifies exactly what data it needs, reduces over-fetching. Use REST for simple CRUD APIs and public APIs. Use GraphQL when you have complex, related data needs and mobile clients where bandwidth matters.
What is your experience with agile / scrum?
Describe your actual experience honestly. Key terms to know: sprint (1-2 week work cycle), backlog, daily standup, sprint review, retrospective, user story, story points. If you have not worked in agile, describe how you would adapt — show you understand the concepts.
Where do you see yourself in 3 years?
For developers: "I want to grow from a contributor to a technical lead, owning architecture decisions and mentoring junior developers." This shows ambition without claiming unrealistic jumps. Tie it to the company — "I see [company name] growing significantly in [area], and I want to grow with it."
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