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Vue.js Composition API Quiz

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Question 1/15

Which feature in the Composition API is designed to control and reuse async logic?

Select your answer

Composable functions

defineAsyncComponent

useAsyncEffect

asyncSetup

Question 2/15

Which Composition API feature allows you to reuse logic across components?

Select your answer

Provide/Inject

Props

Component Methods

Composable functions

Question 3/15

Which function can be used to stop an effect created with

watchEffect

Select your answer

By returning

false

inside the effect function.

clearEffect

function.

stop

function can be called on the effect's return value.

You cannot stop a

watchEffect

Question 4/15

How can you create a dynamic component using the Composition API?

Select your answer

By utilizing the

is

attribute with

<component>

tag and managing state dynamically in

setup

By using

reactify() to convert templates dynamically.

Using Vue's built-in

component()

directive.

By using

defineComponent()

function.

Question 5/15

If you need to initialize a complex object with nested properties in the Composition API, which function should you use?

Select your answer

initializeObject

reactive

defineReactive

ref

Question 6/15

What best describes a `ref` in the Vue Composition API?

Select your answer

An object that holds a reactive reference to a value, which is deeply reactive.

An alias for a computed property.

An object that holds a reactive reference to a primitive value, making it reactive.

An array used to store reactive data sequence.

Question 7/15

Which lifecycle hook is NOT available when using the Composition API?

Select your answer

onBeforeMount

onBeforeUpdate

onMounted

beforeCreate

Question 8/15

Using the Composition API, how can you handle component-specific events, such as a click event?

Select your answer

Using

onMounted

to define handlers directly.

By defining methods returned from the

setup

function, which can then be used in templates.

Through the

watchEffect

function.

Directly within the

setup

function by binding the event.

Question 9/15

Which method is used to execute a function whenever a dependency changes in the Composition API?

Select your answer

refEffect

reactiveEffect

watchEffect

dependentMethod

Question 10/15

What is the main purpose of the Vue Composition API?

Select your answer

To organize complex logic and reuse code across components.

To enhance Vue's performance.

To simplify state management.

To create templates more efficiently.

Question 11/15

How do you use props in the setup function?

Select your answer

By declaring them with

ref

By directly accessing

this.$props

Using

Vue.useProps

By accessing

props

which is passed as an argument to the `setup` function.

Question 12/15

What should be the return type of a `setup` function?

Select your answer

A Vue component instance.

A string representing component state.

An object containing properties and methods to expose to the template.

A render function.

Question 13/15

What role does the `setup` function play in the Composition API?

Select your answer

It provides accessibility to declare Composition API features and serves as a starting point for logic definition.

It initializes the props object.

It replaces the

mounted

lifecycle hook.

It acts as the render function for templates.

Question 14/15

How can lifecycle hooks be used in a

setup

function?

Select your answer

Directly as named exports.

By defining them in a separate file and importing them.

They cannot be used within

setup

function.

Using lifecycle hook functions like

onMounted

directly within the

setup

function.

Question 15/15

In the Composition API, where does the

setup

function receive the context object from?

Select your answer

From a global mixin.

From the component's prototype.

As the second parameter of the setup function.

From an imported module.

Your Results

You did not answer any questions correctly.

Your Answers

Question 1/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which feature in the Composition API is designed to control and reuse async logic?

Available answers

Composable functions

<pre><code>defineAsyncComponent</code></pre>

<pre><code>useAsyncEffect</code></pre>

<pre><code>asyncSetup</code></pre>

Composable functions are designed within the Composition API to contain and reuse logic, including asynchronous logic, enabling you to efficiently manage and integrate async operations within your Vue components.

Question 2/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which Composition API feature allows you to reuse logic across components?

Available answers

Provide/Inject

Props

Component Methods

Composable functions

Composable functions allow logic to be reused across different components in a Vue.js application. They can be created by exporting a function from a file where Composition API features like

ref

reactive

, or

watch

are used.

Question 3/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which function can be used to stop an effect created with <pre><code>watchEffect</code></pre>?

Available answers

By returning <pre><code>false</code></pre> inside the effect function.

<pre><code>clearEffect</code></pre> function.

<pre><code>stop</code></pre> function can be called on the effect's return value.

You cannot stop a <pre><code>watchEffect</code></pre>.

The

stop

function is used to stop a reactive effect obtained from

watchEffect

. The effect object returned by

watchEffect

contains the

stop

property, used to manually terminate the effect.

Question 4/15

😊 Your answer was correct 🙁 Your answer was incorrect

How can you create a dynamic component using the Composition API?

Available answers

By utilizing the <pre><code>is</code></pre> attribute with <pre><code><component></code></pre> tag and managing state dynamically in <pre><code>setup</code></pre>.

By using <pre><code>reactify()</code> to convert templates dynamically.</pre>

Using Vue's built-in <pre><code>component()</code></pre> directive.

By using <pre><code>defineComponent()</code></pre> function.

Dynamic components in Vue can be created using the

<component>

HTML element with an

is

attribute. The component specified through the

is

attribute can change based on the state managed in the

setup

function.

Question 5/15

😊 Your answer was correct 🙁 Your answer was incorrect

If you need to initialize a complex object with nested properties in the Composition API, which function should you use?

Available answers

<pre><code>initializeObject</code></pre>

<pre><code>reactive</code></pre>

<pre><code>defineReactive</code></pre>

For initializing complex objects with nested properties in the Composition API, the

reactive

function is the appropriate choice, as it provides deep reactivity.

Question 6/15

😊 Your answer was correct 🙁 Your answer was incorrect

What best describes a `ref` in the Vue Composition API?

Available answers

An object that holds a reactive reference to a value, which is deeply reactive.

An alias for a computed property.

An object that holds a reactive reference to a primitive value, making it reactive.

An array used to store reactive data sequence.

A `ref` is an object that keeps a reactive reference to a primitive value or an object, allowing it to change reactively and can be used in templates directly by accessing

value

in JavaScript.

Question 7/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which lifecycle hook is NOT available when using the Composition API?

Available answers

<pre><code>onBeforeMount</code></pre>

<pre><code>onBeforeUpdate</code></pre>

<pre><code>onMounted</code></pre>

<pre><code>beforeCreate</code></pre>

The

beforeCreate

hook is not available in the Composition API. All hooks are prefixed with

on

, such as

onMounted

onBeforeMount

, and they are designed to be used within the

setup

function.

Question 8/15

😊 Your answer was correct 🙁 Your answer was incorrect

Using the Composition API, how can you handle component-specific events, such as a click event?

Available answers

Using <pre><code>onMounted</code></pre> to define handlers directly.

By defining methods returned from the <pre><code>setup</code></pre> function, which can then be used in templates.

Through the <pre><code>watchEffect</code></pre> function.

Directly within the <pre><code>setup</code></pre> function by binding the event.

In the Composition API, you can define methods that handle events and return these methods from the

setup

function. These methods can then be assigned to event listeners in the template.

Question 9/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which method is used to execute a function whenever a dependency changes in the Composition API?

Available answers

<pre><code>refEffect</code></pre>

<pre><code>reactiveEffect</code></pre>

<pre><code>watchEffect</code></pre>

<pre><code>dependentMethod</code></pre>

In the Composition API,

watchEffect

allows developers to run a function whenever its dependencies change, automating side effects tracking.

Question 10/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the main purpose of the Vue Composition API?

Available answers

To organize complex logic and reuse code across components.

To enhance Vue's performance.

To simplify state management.

To create templates more efficiently.

The Composition API in Vue.js is primarily designed to organize complex logic and promote reusability of code across components. It allows for more flexible and better-organized code compared to the Options API.

Question 11/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you use props in the setup function?

Available answers

By declaring them with <pre><code>ref</code></pre>.

By directly accessing <pre><code>this.$props</code></pre>.

Using <pre><code>Vue.useProps</code></pre>.

By accessing <pre><code>props</code></pre> which is passed as an argument to the `setup` function.

Props are accessed in the

setup

function through the

props

argument that is passed to it.

Question 12/15

😊 Your answer was correct 🙁 Your answer was incorrect

What should be the return type of a `setup` function?

Available answers

A Vue component instance.

A string representing component state.

An object containing properties and methods to expose to the template.

A render function.

The

setup

function returns an object that includes all the properties and methods to expose to the template, making them accessible within the component's HTML markup.

Question 13/15

😊 Your answer was correct 🙁 Your answer was incorrect

What role does the `setup` function play in the Composition API?

Available answers

It provides accessibility to declare Composition API features and serves as a starting point for logic definition.

It initializes the props object.

It replaces the <pre><code>mounted</code></pre> lifecycle hook.

It acts as the render function for templates.

The

setup

function is used to set up the component by using the Composition API. It serves as the entry point for defining reactive data, lifecycle hooks, and other logic.

Question 14/15

😊 Your answer was correct 🙁 Your answer was incorrect

How can lifecycle hooks be used in a <pre><code>setup</code></pre> function?

Available answers

Directly as named exports.

By defining them in a separate file and importing them.

They cannot be used within <pre><code>setup</code></pre> function.

Using lifecycle hook functions like <pre><code>onMounted</code></pre> directly within the <pre><code>setup</code></pre> function.

In the Composition API, lifecycle hooks such as

onMounted

onUpdated

, etc., can be directly used within the

setup

function by calling these hooks with the corresponding lifecycle actions.

Question 15/15

😊 Your answer was correct 🙁 Your answer was incorrect

In the Composition API, where does the <pre><code>setup</code></pre> function receive the context object from?

Available answers

From a global mixin.

From the component's prototype.

As the second parameter of the setup function.

From an imported module.

The context object is accessible as the second parameter in the

setup

function, providing access to slots, emit functions, and other options not exposed as part of the first props argument.