Q1. Which of the following lifecycle events React components have at the highest level?

Initialization

Destruction

State/Property Updates

All of the above

Q2. Arbitrary inputs of components are called?

Elements

Keys

Ref

Props

Q3. We can prevent default behavior in React using?

preventDefault()

avoidDefault()

revokeDefault()

None of the above

Q4. Which method is used to generate lists?

new()

map()

generate()

maps()

Q5. We can update the state in React.js by calling to setState() method. These calls are?

Are asynchronous but can be made synchronous when required

Synchronous in nature

Asynchronous in nature

None of the above

Q6. What is the smallest building block of ReactJS?

elements

components

props

None of the above

Q7. Which of the following statement is true for uncontrolled components in React.js?

The source of truth can be anything

The source of truth is a component state

The source of truth is DOM

All of the above

Q8. What is true for the keys given to a list of elements in React?

Unique among the siblings only

Unique in the DOM

Do not require to be unique

None of the above

Q9. Can components be passed as props?

Yes

No

May be

Can not say