In a React application, users are experiencing unexpected focus behavior when navigating between form fields. Which accessibility approach would best solve this issue?

Implement a focus management system with useRef and useEffect

Disable focus outlines for all elements

Implement a focus management system with useRef and useEffect

Add tabIndex=-1 to all elements

Force focus on document.body after every interaction

What happens when you call setState multiple times in rapid succession?

React batches the updates and performs a single render

Each setState causes an immediate render

React batches the updates and performs a single render

Only the last setState is processed

What happens when you use useState with an object that contains nested properties?

React performs a shallow comparison and requires full object updates

React automatically handles deep updates of nested properties

Only top-level properties trigger re-renders when updated

React performs a shallow comparison and requires full object updates

Nested properties cannot be used with useState

Why would you use 'useLayoutEffect' instead of 'useEffect' in a performance-sensitive React application?

To prevent visual flicker by manipulating the DOM before the browser paints.

To fetch data from the backend more efficiently.

To reduce the number of renders.

When setState() is called inside render() method, which of the following events takes place?

repetitive output happiness on the screen

What happens if you use 'useEffect' with a stale closure in a React functional component?

The effect may operate on outdated state or props.

The component will not re-render.

An error will be thrown during render.

React will automatically detect and update the closure.

The effect may operate on outdated state or props.

React - Sample Questions

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Preview limited to 8 questions. To protect the integrity of our question library and prevent answer leaks, only a curated sample is shown here. Assessments draw from a much larger, continuously updated bank of questions.

Easygeneral1 point

State whether true or false: React.js covers only the view layer of the app.

Easygeneral1 point

State whether true or false: React.js covers only the view layer of the app.

React - Sample Questions

8 questions3 Easy3 Medium2 Hard

Easygeneral1 point

State whether true or false: React.js covers only the view layer of the app.

Easygeneral1 point

State whether true or false: React.js covers only the view layer of the app.

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React - Sample Questions

React - Sample Questions