Free Building React App Q&A - Get Started with React

What is the result of the expression

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

Correct! Wrong!

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

False

True

Correct! Wrong!

Is the use of JSX mandatory to develop with React?

Yes

Sometimes

Correct! Wrong!

Props can be modified in child component directly like state

True

False

Correct! Wrong!

We can integrate reactJS in any of the existing web app

True

False

Correct! Wrong!

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

The braces interrupt the information listing flow.

The keys are mandatory to prevent the application from stopping.

Keys help React identify which items have changed.

Keys are not mandatory.

Correct! Wrong!

About hooks it is incorrect to say:

We can create our own hooks.

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

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.

Correct! Wrong!

FREE Building React App Questions and Answers

What is the result of the expression

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

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

Is the use of JSX mandatory to develop with React?

Props can be modified in child component directly like state

We can integrate reactJS in any of the existing web app

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

About hooks it is incorrect to say:

FREE Introducing React Hooks Questions and Answers

FREE React Javascript Questions and Answers

What is the result of the expression const [add, setSum] = useState(0) setSum(add + 4) setSum(adding - (1x2))

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

Is the use of JSX mandatory to develop with React?

Props can be modified in child component directly like state

We can integrate reactJS in any of the existing web app

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

About hooks it is incorrect to say:

Premium Tests $49/moFREE November-2024

What is the result of the expression

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

Premium Tests $49/mo
FREE November-2024