Quiz

React Advanced

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Quiz

Question 1

Which React function is used to lazily load a component?

A

React.useEffect()

B

React.memo()

C

React.Lazy()

D

React.loadComponent()

Question 2

What is the role of React.Suspense in lazy loading?

A

It prevents the lazy-loaded component from rendering

B

It loads the component immediately without delay

C

It provides a fallback UI while the lazy-loaded component is being fetched

D

It forces all components to load at once

Question 3

Which of the following is the correct syntax for dynamically importing a component using React.lazy()?

A

const Component = React.lazy('./Component');

B

const Component = React.lazy(() => import('./Component'));

C

const Component = import('./Component');

D

const Component = new LazyComponent('./Component');

Question 4

How can lazy loading be implemented for React Router routes?

A

By using React.lazy() and wrapping routes inside <Suspense>

B

By importing all components at the top of the file

C

By wrapping each route inside a useEffect hook

D

By disabling JavaScript execution until navigation occurs

.....

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