Vue JS Foundation of Vue Js 4

Question 1

What is the purpose of a slot in a Vue component?

Accepted Answer

To allow parents to inject content into a child's template

Answer

Slots let a parent pass custom template content into a designated spot in a child component.

Question 2

Which directive outputs raw HTML and should be used cautiously?

Accepted Answer

v-html

Answer

v-html renders raw HTML and can expose XSS risks if the content is untrusted.

Question 3

What does the watch() function let you do?

Accepted Answer

Run a callback when a reactive source changes

Answer

watch() observes a reactive source and runs side-effect logic when it changes.

Question 4

Which event modifier prevents the default browser action?

Accepted Answer

.prevent

Answer

The .prevent modifier calls event.preventDefault() on the handled event.

Question 5

What does the v-once directive do?

Accepted Answer

Renders the element only one time and skips future updates

Answer

v-once renders the element/component once and treats it as static thereafter.

Vue JS Practice Test