SDE Mock Interview Practice: Coding and Technical Rounds

Typical SDE rounds: a screening call, one or two DSA rounds where you code in an online editor, often a behavioral or project round, and sometimes a small system design round. OA rounds come first at most companies.

Freshers and interns get DSA-heavy loops; experienced hires get more design and debugging. Your mock sessions should mirror the level you are applying for.

Panels grade your thinking, not just the final code. Practice saying the approach out loud: clarify constraints, propose brute force, analyze complexity, then implement with edge cases.

Record one coding practice per week. If you can follow your own recording without context, you are explaining well. If not, your code is carrying the answer instead of your communication.

Master the patterns that repeat: two pointers, sliding window, hash map counting, prefix sums, binary search, BFS/DFS, recursion with memoization, and simple greedy choices. One problem from each pattern per week keeps you sharp.

Practice under time limits — 25–35 minutes per medium problem — and always say the complexity after finishing. Companies like Amazon and Zomato reuse these patterns in OAs.

For every second or third mock, add a small design question — design a URL shortener, a chat feature, or a rate limiter at a basic level — and a behavioral round on your projects and team experiences.

Apply's SDE mock interview combines technical, coding, and behavioral questions in one session, with optional coding rounds and scored feedback — a realistic SDE loop practice.