Vue JS Foundation of Vue Js 3

Question 1

Which lifecycle hook runs after a component is first rendered to the DOM in Vue 3 Composition API?

Accepted Answer

onMounted

Answer

onBeforeMount

Answer

onUpdated

Answer

onUnmounted

Question 2

What does the computed() function return?

Accepted Answer

A reactive value that updates when its dependencies change

Answer

A plain function

Answer

An event emitter

Answer

A promise

Question 3

How does a child component send data up to its parent in Vue?

Accepted Answer

By emitting a custom event

Answer

By mutating the prop directly

Answer

By using v-model on data

Answer

By importing the parent

Question 4

What is the correct way to pass static text into a child component prop?

Accepted Answer

message="hello"

Answer

:message="hello"

Answer

@message="hello"

Answer

v-model:message="hello"

Question 5

Which option declares the data a component accepts from its parent in the Options API?

Accepted Answer

props

Answer

data

Answer

emits

Answer

methods

Question 6

What does the reactive() function expect as its argument?

Accepted Answer

An object or array

Answer

A primitive string

Answer

A number

Answer

A boolean

Question 7

In a single-file component, which block contains the component's markup?

Accepted Answer

Answer

Answer

<style>

Answer

<setup>