Technical Question Bank · Peer-Reviewed

Job Interview Questions and Answers Directory

Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (3 available).

Filters

Keyword Category Difficulty Type Sort by

Reset

Active: Tag: sharding ×

MongoDB Hard system-design

Q1. How does sharding work in MongoDB?

Sharding horizontally partitions a collection across mongos routers and shards. You choose a shard key, and MongoDB splits the key space into chunks distributed and balan...

1 Answer

Caching Strategies Hard system-design

Q2. How do you handle hot keys in a distributed cache?

A hot key is accessed so frequently that a single cache node or partition becomes a bottleneck. Keys are distributed by consistent hashing, but one key always maps to one...

2 Answer

DBMS Hard system-design

Q3. How would you scale a relational database as traffic grows?

Scaling relational databases follows a progression, because a single node eventually hits CPU, memory or I/O limits. 1. Optimise first: fix queries, add indexes, tune the...

2 Answer