All Questions

What is State Management in Frontend Development?

State management is the process of handling and updating the data (state) of an application across components.

Common tools:

• React Context API
• Redux / RTK
• Zustand
• TanStack Query (for server state)

It helps keep UI and data in sync.

What is REST API?

REST (Representational State Transfer) API is a way for two systems to communicate over HTTP using standard methods.

Main HTTP methods:

• GET – Fetch data
• POST – Create data
• PUT/PATCH – Update data
• DELETE – Remove data

REST APIs are stateless, meaning each request contains all the information needed to process it.

What is the difference between a Framework and a Library?

• A Library is a collection of reusable functions or code that you call when needed.
• A Framework provides a structure for your application and calls your code when required (Inversion of Control).

Example:

• Library: React, Lodash
• Framework: Next.js, Angular, Django