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).

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OOP Concepts Easy technical

Q1. What is encapsulation and why does it matter?

Encapsulation means bundling data with the operations that act on it and restricting direct access to the internals. The class exposes a deliberate public API and keeps f...

2 Answer

OOP Concepts Medium technical

Q2. When should you prefer composition over inheritance?

Inheritance is an is-a relationship: `Dog extends Animal` because every dog is an animal. Composition is a has-a relationship: `Car` holds an `Engine`. Inheritance gives ...

1 Answer

Microservices Medium technical

Q3. Why does each microservice need its own database?

Owning its data is what makes a service independently deployable. With a shared database, a schema change in one service can break another, teams coordinate releases, and...

2 Answer