React Hooks Quiz III

React Hooks Quiz III

University

8 Qs

quiz-placeholder

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React Hooks Quiz III

React Hooks Quiz III

Assessment

Quiz

Information Technology (IT)

University

Practice Problem

Hard

Created by

Aymane Benhima

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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which Hook is used to store and update state in functional components?

useState

useEffect

useRef

useContext

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct way to initialize state using useState?

const [count, setCount] = useState(0);

const count = useState(0);

const [count] = useState(0);

const [count, updateCount] = useState();

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What will happen if useEffect is missing the dependency array?

The effect will run after every render.

The effect will never run.

The effect will run only once.

React will throw an error.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a common mistake when using useEffect with dependencies?

Not including all necessary dependencies in the array.

Using useEffect inside event handlers.

Using useState inside useEffect.

Calling setState directly inside the render function.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you clean up a side effect in useEffect?

Return a cleanup function inside useEffect.

Call useEffect twice.

Use useMemo instead of useEffect.

Set useEffect dependencies to null.

6.

OPEN ENDED QUESTION

3 mins • 1 pt

Media Image

What is wrong with the following useState usage?

Evaluate responses using AI:

OFF

7.

OPEN ENDED QUESTION

3 mins • 1 pt

Media Image

What is wrong with this useEffect implementation?

Evaluate responses using AI:

OFF

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