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React JS

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Título del Test:
React JS

Descripción:
Information about React

Fecha de Creación: 2025/11/05

Categoría: Personal

Número Preguntas: 4

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Temario:

In React, which Hook is used to store and update data that can change over time inside a functional component?. useEffect. useState. useRef. useContext.

When you call the setter function from useState, React updates the state immediately. True. False.

Calling the setter function from useState always triggers a re-render, even if the new value is the same as the old one. True. False.

You’re building a React component that shows how many times a user has clicked a button. Right now, when the button is clicked, the number on the screen doesn’t change. What’s the best way to fix this problem?. Store the number of clicks in a normal variable and increase it inside the function. Use useEffect to watch for button clicks and update the page manually. Use useState to store the click count and update it with its setter function. Use useRef to keep the value without re-rendering the component.

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