Technical Question Bank · Peer-Reviewed
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (2,728 available).
Average speed is total distance divided by total time, not the average of the two speeds. Total distance = 300 + 200 = 500 km. Total time = 3 + 2.5 = 5.5 hours. Average s...
Use STAR and show respect plus results. Situation: "A teammate wanted to ship a caching layer right before a major release." Task: "I was responsible for release stabilit...
Use a tight 60-90 second structure: Present, Past, Future. - Present: your current role and the core value you deliver ("I am a full-stack engineer with four years buildi...
A VM virtualises hardware: each VM runs a full guest OS on a hypervisor, so it is heavy (GBs) and slow to boot (minutes) but strongly isolated. A container virtualises th...
Requirements: shorten a long URL, redirect quickly, handle ~100M new links per day with a 100:1 read-to-write ratio. API: POST /api/links {longUrl} -> {shortUrl}; GET /{c...
Big O describes how runtime or memory grows with input size, ignoring constants and lower-order terms. From fastest to slowest: - O(1) constant: hash lookup, array index....
- An interface declares a contract. It supports abstract methods plus default and static methods (Java 8+), private methods (Java 9+) and constants. A class can implement...
Relational Database Management Systems (RDBMS). SQL is the ANSI-standard language for creating, querying, updating, and managing relational databases. Major implementatio...
Node uses libuv and phases its loop: timers, pending callbacks, poll, check (setImmediate) and close callbacks, with process.nextTick and promise microtasks draining betw...
- A list is mutable, uses square brackets, and supports append, remove and in-place sorting. - A tuple is immutable, uses parentheses, and once created cannot change. It ...
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