Building React App

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About lists in React, why should we use "keys"?

The keys are mandatory to prevent the application from stopping.

The braces interrupt the information listing flow.

Keys help React identify which items have changed.

Keys are not mandatory.

Correct! Wrong!

Props can be modified in child component directly like state

False

True

Correct! Wrong!

About hooks it is incorrect to say:

We can create our own hooks.

Hooks work inside classes and allow you to use React without classes.

Hooks don't work inside classes and allow you to use React without classes.

Hooks are functions that allow you to hook into React's state and lifecycle features from within functional components.

Correct! Wrong!

We can integrate reactJS in any of the existing web app

True

False

Correct! Wrong!

What is the result of the expression

const [add, setSum] = useState(0)
setSum(add + 4)
setSum(adding - (1x2))

3

2

6

4

Correct! Wrong!

ReactJS does not need HTML or any of the HTML preprocessor to make UI elements

True

False

Correct! Wrong!

Is the use of JSX mandatory to develop with React?

No

Sometimes

Yes

Correct! Wrong!