Tech Interview Rounds Decoded: DSA, System Design, HR

Tech interviews in India in 2026 follow a recognisable pattern. Knowing what each round measures lets you prepare proportional to where you currently lose offers.

The DSA round

One or two coding problems, 45 minutes, on a shared editor or whiteboard. Companies want to see clean code, correct edge cases, and you talking through your thinking. Patterns that cover 90% of fresher questions: arrays, strings, hashmaps, two pointers, sliding window, binary search, BFS/DFS, trees, basic DP. Aim for 200-300 LeetCode mediums over two months.

The system design round

For freshers, this is often “low-level design” — design a parking lot, design Splitwise, design a rate limiter — and tests OOP, class boundaries, and API thinking. For experienced engineers, it expands to high-level design with database choices, caching, queues, and trade-offs.

The behavioural round

Often dismissed, frequently decisive. Use the STAR framework: Situation, Task, Action, Result. Have five stories ready that map to common prompts: conflict, leadership, failure, deadline pressure, ambiguous requirements. Practise them out loud until they sound natural.

The HR round

Mostly compensation, joining date, location, and a fit check. Be specific about your expectations and back them with data. Read the company’s principles and tie your answers to them — the homework shows.

Where freshers actually lose

• Communication during DSA — silent coding loses to clear narration.
• Edge cases — null, empty input, single element. Always address them.
• Vague behavioural stories — specifics with numbers beat generic principles.
• Asking weak questions at the end — prepare three sharp questions per company.