React useRef Hook MCQ useRef Practice Questions

Direction: Choose the correct option

What is the useRef hook used for?

A. To manage state

B. To memoize values

C. To create a mutable object that persists across renders

D. To perform side effects

Direction: Choose the correct option

Changing the .current property of a ref does what?

A. Triggers a re-render

B. Causes an error

C. Does not trigger a re-render

D. Updates state

Direction: Choose the correct option

Common use cases for useRef include:

A. Accessing DOM elements directly

B. Storing previous values

C. Keeping mutable instance-like variables

D. All of the above

Direction: Choose the correct option

How do you access an input element using useRef?

A. <input ref={myRef} /> then myRef.value

B. <input ref={myRef} /> then myRef.current.value

C. <input ref={() => myRef} />

D. <input ref={myRef.current} />

Direction: Choose the correct option

Does useRef accept an initial value?

A. Yes, you can pass an initial value like useRef(initialValue)

B. Only for DOM elements

C. Yes, but only strings

D. No, it always starts as null

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