Vue JS Project Components 4

Question 1

Which lifecycle hook runs after a component is added to the DOM?

Accepted Answer

mounted

Answer

created

Answer

beforeMount

Answer

destroyed

Question 2

What does a computed property provide over a method?

Accepted Answer

Cached results that update only when dependencies change

Answer

A way to register components

Answer

Automatic event emitting

Answer

Scoped styles

Question 3

How do you create two-way binding on a custom component?

Accepted Answer

Use v-model on the component

Answer

Use v-once

Answer

Use v-bind only

Answer

Use a slot

Question 4

Which hook is best for cleaning up timers or listeners before a component is removed?

Accepted Answer

beforeUnmount

Answer

mounted

Answer

created

Answer

beforeCreate

Question 5

What is the role of the key attribute in a v-for list of components?

Accepted Answer

To give Vue a stable identity for efficient DOM updates

Answer

To style each item

Answer

To emit events

Answer

To register the component

Question 6

How can a component pass a function down so a child can call back?

Accepted Answer

Pass it as a prop or emit an event

Answer

Store it in CSS

Answer

Use the key attribute

Answer

Use beforeCreate

Question 7

What does the provide/inject pair solve in a component tree?

Accepted Answer

Passing data to deeply nested descendants without prop drilling

Answer

Scoping CSS

Answer

Registering global components

Answer

Caching computed values