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Vue.js Component Basics Quiz

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Question 1/15

How do you bind a JavaScript variable to an HTML element in a Vue template?

Select your answer

Using the 'v-bind' directive.

Using the double curly braces ({{ }}).

Using the 'v-model' directive.

Using the 'v-for' directive.

Question 2/15

How do you handle form submissions in Vue.js?

<!-- Vue template -->
<form @submit.prevent="submitForm">
  <!-- form controls -->
</form>

Select your answer

Use '@submit.prevent'.

Use ':class'.

Use 'v-model'.

Use 'v-if'.

Question 3/15

Which directive is used for conditional rendering in Vue.js?

Select your answer

v-on

v-for

v-show

v-if

Question 4/15

What attribute is used to ensure keys are unique in lists rendered with 'v-for'?

<li v-for="item in items" :key="item.id">{{ item.name }}</li>

Select your answer

:ref

:id

:class

:key

Question 5/15

Which directive would you use to two-way bind a data property to an input element?

<!-- Vue template -->
<input v-model="username" />

Select your answer

v-bind

v-if

v-model

v-on

Question 6/15

Which directive would you use to conditionally render a piece of element?

Select your answer

v-on

v-for

v-show

v-if

Question 7/15

What lifecycle hook would you use to fetch data when a component is created?

Select your answer

mounted

created

destroyed

updated

Question 8/15

How do you configure a CSS class for an active state using Vue Router?

<router-link to="/home" active-class="active-link">Home</router-link>

Select your answer

Using 'v-if'.

Using 'v-show'.

Using 'active-class' attribute on .

Using 'v-model'.

Question 9/15

How do you bind an event listener to a button click in Vue?

<!-- Vue template -->
<button @click="handleClick">Click me</button>

Select your answer

Using 'v-for:click'.

Using 'v-bind:click'.

Using 'v-model:click'.

Using '@click'.

Question 10/15

How does Vue handle directives that are prefixed with 'v-'?

Select your answer

They are ignored by Vue.

They are unchangeable classes.

They are treated as custom elements.

They are special attributes with specific functionality.

Question 11/15

How do you emit an event from a child component in Vue?

// In child component
this.$emit('myEvent', payload);

Select your answer

Using 'this.$on'.

Using 'this.$emit'.

Using 'v-if'.

Using 'v-bind'.

Question 12/15

What is the purpose of the 'data' function in a Vue component?

Select your answer

To store component's data that can be reactive.

To define the component's HTML template.

To specify the component's methods.

To import external scripts.

Question 13/15

How can you specify a default value for a prop in Vue.js?

props: {
  myProp: {
    type: String,
    default: 'Default Value'
  }
}

Select your answer

Using computed properties.

Using the 'methods' option.

Using the 'data' function.

Within the prop definition using 'default'.

Question 14/15

What is a scoped slot in Vue?

<template #default="slotProps">
  <span>{{ slotProps.text }}</span>
</template>

Select your answer

A slot used for handling events.

A slot that has access to data passed from the child component.

A slot that styles differently depending on its parent.

A slot that cannot be overridden.

Question 15/15

How would you register a component globally in Vue?

Vue.component('my-component', {
  template: '<div>A custom component!</div>'
});

Select your answer

Using 'register'.

Using 'Vue.directives'.

Using 'Vue.component'.

Using 'Vue.create'.

Your Results

You did not answer any questions correctly.

Your Answers

Question 1/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you bind a JavaScript variable to an HTML element in a Vue template?

Available answers

Using the 'v-bind' directive.

Using the double curly braces ({{ }}).

Using the 'v-model' directive.

Using the 'v-for' directive.

In Vue templates, you use the double curly braces ({{ }}) to bind JavaScript expressions to HTML elements. This is known as interpolation.

Question 2/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you handle form submissions in Vue.js?

<!-- Vue template -->
<form @submit.prevent="submitForm">
  <!-- form controls -->
</form>

Available answers

Use '@submit.prevent'.

Use ':class'.

Use 'v-model'.

Use 'v-if'.

Form submissions in Vue.js can be handled by listening to the 'submit' event using '@submit'. Adding '.prevent' modifier prevents the default browser behavior, allowing you to handle the submission with the specified method.

Question 3/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which directive is used for conditional rendering in Vue.js?

Available answers

v-on

v-for

v-show

v-if

The 'v-if' directive in Vue.js is used to conditionally render elements. It renders an element based on a boolean expression's truthiness.

Question 4/15

😊 Your answer was correct 🙁 Your answer was incorrect

What attribute is used to ensure keys are unique in lists rendered with 'v-for'?

<li v-for="item in items" :key="item.id">{{ item.name }}</li>

Available answers

:ref

:id

:class

:key

The ':key' attribute is used in Vue.js with 'v-for' directives to ensure that items have a unique identity. This helps Vue to optimize rendering by detecting changes.

Question 5/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which directive would you use to two-way bind a data property to an input element?

<!-- Vue template -->
<input v-model="username" />

Available answers

v-bind

v-if

v-model

v-on

The 'v-model' directive in Vue creates a two-way data binding on form input, textarea, and select elements. The code snippet shows using 'v-model' to bind the 'username' property to an input element.

Question 6/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which directive would you use to conditionally render a piece of element?

Available answers

v-on

v-for

v-show

v-if

The 'v-if' directive is used for conditionally rendering elements. When the condition is false, the element and its children are not rendered.

Question 7/15

😊 Your answer was correct 🙁 Your answer was incorrect

What lifecycle hook would you use to fetch data when a component is created?

Available answers

mounted

created

destroyed

updated

The 'created' lifecycle hook is invoked when a Vue instance is created. It is a good place to fetch data because the component is fully initialized but not yet mounted.

Question 8/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you configure a CSS class for an active state using Vue Router?

<router-link to="/home" active-class="active-link">Home</router-link>

Available answers

Using 'v-if'.

Using 'v-show'.

Using 'active-class' attribute on <router-link>.

Using 'v-model'.

In Vue Router, you can configure a CSS class for an active link state using the 'active-class' attribute on a . The code snippet sets a class named 'active-link' for the active link to '/home'.

Question 9/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you bind an event listener to a button click in Vue?

<!-- Vue template -->
<button @click="handleClick">Click me</button>

Available answers

Using 'v-for:click'.

Using 'v-bind:click'.

Using 'v-model:click'.

Using '@click'.

To bind an event listener for a button click in Vue, use the '@click' directive. It is shorthand for 'v-on:click'. In the code snippet, the click event triggers the 'handleClick' method.

Question 10/15

😊 Your answer was correct 🙁 Your answer was incorrect

How does Vue handle directives that are prefixed with 'v-'?

Available answers

They are ignored by Vue.

They are unchangeable classes.

They are treated as custom elements.

They are special attributes with specific functionality.

In Vue.js, directives prefixed with 'v-' are special attributes that apply reactive behavior to the DOM. Examples include 'v-if', 'v-for', and 'v-bind'.

Question 11/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you emit an event from a child component in Vue?

// In child component
this.$emit('myEvent', payload);

Available answers

Using 'this.$on'.

Using 'this.$emit'.

Using 'v-if'.

Using 'v-bind'.

To emit an event from a child component in Vue, use 'this.$emit()' inside the child component. This allows the parent component to listen for the event. In the code snippet, 'myEvent' is the event emitted with a 'payload'.

Question 12/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the purpose of the 'data' function in a Vue component?

Available answers

To store component's data that can be reactive.

To define the component's HTML template.

To specify the component's methods.

To import external scripts.

The 'data' function in a Vue component returns an object. This object is reactive, meaning that Vue will automatically update the DOM when these properties change. It is used to store the component's state.

Question 13/15

😊 Your answer was correct 🙁 Your answer was incorrect

How can you specify a default value for a prop in Vue.js?

props: {
  myProp: {
    type: String,
    default: 'Default Value'
  }
}

Available answers

Using computed properties.

Using the 'methods' option.

Using the 'data' function.

Within the prop definition using 'default'.

In Vue.js, you can specify a default value for a prop by including a 'default' field within the prop definition. The provided code snippet shows how to set 'Default Value' as the default for 'myProp'.

Question 14/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is a scoped slot in Vue?

<template #default="slotProps">
  <span>{{ slotProps.text }}</span>
</template>

Available answers

A slot used for handling events.

A slot that has access to data passed from the child component.

A slot that styles differently depending on its parent.

A slot that cannot be overridden.

A scoped slot is a Vue slot that allows you to pass data from the child component back to the parent using the 'slot-scope' or newer shorthand syntax ('#'). The provided code snippet is an example where 'slotProps.text' is used.

Question 15/15

😊 Your answer was correct 🙁 Your answer was incorrect

How would you register a component globally in Vue?

Vue.component('my-component', {
  template: '<div>A custom component!</div>'
});

Available answers

Using 'register'.

Using 'Vue.directives'.

Using 'Vue.component'.

Using 'Vue.create'.

To register a component globally in Vue, use 'Vue.component()', passing the component's name and its options. This makes the component available throughout the entire application.