React Hooks Introducing React Hooks 2

Question 1

In which React version were Hooks officially released as a stable feature?

Accepted Answer

React 16.8

Answer

Hooks were added to React in version 16.8.

Question 2

What is the primary problem Hooks were designed to solve regarding stateful logic?

Accepted Answer

Difficulty reusing stateful logic between components

Answer

Hooks make it easy to extract and share stateful logic without changing the component hierarchy.

Question 3

Which of these patterns did Hooks aim to replace for sharing logic?

Accepted Answer

Higher-order components and render props

Answer

Hooks reduce the need for HOCs and render props by letting you reuse logic via custom Hooks.

Question 4

Can you use Hooks inside a class component?

Accepted Answer

No, Hooks only work in function components

Answer

Hooks let you use state and other features without writing a class, and cannot be called inside classes.

Question 5

What naming convention identifies a function as a React Hook?

Accepted Answer

It starts with the prefix 'use'

Answer

Hooks are functions whose names start with 'use', like useState and useEffect.

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