React useState Hook MCQ useState Practice Questions

Direction: Choose the correct option

What does the useState hook return?

A. The current state value only

B. A single value

C. An object with state and setter

D. An array with the current state and a function to update it

Direction: Choose the correct option

How do you import useState?

A. import { useState } from 'react-dom';

B. import useState from 'react';

C. import React, { useState } from 'react';

D. import React.useState from 'react';

Direction: Choose the correct option

What is the initial value passed to useState used for?

A. It sets the type of state

B. It sets the state on every render

C. It is ignored

D. It sets the state only once when the component mounts

Direction: Choose the correct option

Which of the following correctly declares a state variable 'count' with setter 'setCount'?

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

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

C. const [count, setCount] = useState;

D. const count = useState(0);

Direction: Choose the correct option

If you call the setter function (e.g., setCount) with the same value as current state, what happens?

A. An error is thrown

B. React may skip re-rendering if it detects no change

C. React always re-renders

D. The component unmounts

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