Building React App

Question 1

We can integrate reactJS in any of the existing web app

Accepted Answer

True

Answer

False

Question 2

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

Accepted Answer

False

Answer

True

Question 3

Props can be modified in child component directly like state

Accepted Answer

False

Answer

True

Question 4

About hooks it is incorrect to say:

Accepted Answer

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

Answer

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

Answer

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

Answer

We can create our own hooks.

Question 5

What is the result of the expression

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

Accepted Answer

2

Answer

4

Answer

3

Answer

6

Question 6

Is the use of JSX mandatory to develop with React?

Accepted Answer

No

Answer

Yes

Answer

Sometimes

Question 7

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

Accepted Answer

Keys help React identify which items have changed.

Answer

The braces interrupt the information listing flow.

Answer

Keys are not mandatory.

Answer

The keys are mandatory to prevent the application from stopping.