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Vue.js Component Basics Quiz

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Question 1/15

What is a Vuex store used for in a Vue.js application?

Select your answer

Managing global state across components.

Storing individual component states.

Adding new components dynamically.

Defining custom directives.

Question 2/15

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

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

Select your answer

Using 'v-bind'.

Using 'this.$emit'.

Using 'this.$on'.

Using 'v-if'.

Question 3/15

What is a Vue component's 'name' option used for?

Select your answer

To specify styles for the component.

To define the component's data properties.

To declare the component's methods.

To provide an identifier for the component for debugging purposes.

Question 4/15

How do you handle form submissions in Vue.js?

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

Select your answer

Use 'v-model'.

Use '@submit.prevent'.

Use ':class'.

Use 'v-if'.

Question 5/15

When would you use a 'watcher' in Vue.js?

Select your answer

To define static properties.

To register global components.

To define component templates.

To respond to reactive data changes.

Question 6/15

What is the syntax for creating a computed property in Vue?

computed: {
  reversedMessage() {
    return this.message.split('').reverse().join('');
  }
}

Select your answer

Using the 'computed' option.

Using the 'data' option.

Using the 'watch' option.

Using the 'methods' option.

Question 7/15

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

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

Select your answer

Using the 'data' function.

Using the 'methods' option.

Within the prop definition using 'default'.

Using computed properties.

Question 8/15

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

Select your answer

To specify the component's methods.

To define the component's HTML template.

To store component's data that can be reactive.

To import external scripts.

Question 9/15

What does the 'props' option in a Vue component do?

Select your answer

Specifies the data that can be passed into the component from its parent.

Lists events emitted by the component.

Specifies the global state of the application.

Lists the CSS styles for the component.

Question 10/15

What is a scoped slot in Vue?

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

Select your answer

A slot that styles differently depending on its parent.

A slot used for handling events.

A slot that cannot be overridden.

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

Question 11/15

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

Select your answer

created

mounted

updated

destroyed

Question 12/15

How do you create a dynamic component in Vue?

<!-- Vue template -->
<component :is="currentComponent"></component>

Select your answer

Using ''.

Using 'v-for'.

Using 'v-if'.

Using 'v-show'.

Question 13/15

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-model'.

Using 'active-class' attribute on .

Using 'v-show'.

Using 'v-if'.

Question 14/15

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

Select your answer

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

Using the 'v-for' directive.

Using the 'v-bind' directive.

Using the 'v-model' directive.

Question 15/15

How can you centrally manage your application's state in Vue.js?

Select your answer

Using Vuex.

Using Vue Router.

Using Vue Components.

Using the 'data' function.

Your Results

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Your Answers

Question 1/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is a Vuex store used for in a Vue.js application?

Available answers

Managing global state across components.

Storing individual component states.

Adding new components dynamically.

Defining custom directives.

A Vuex store is a centralized state management solution for Vue.js applications. It allows for managing the global state across components to keep data in sync and consistent.

Question 2/15

😊 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 'v-bind'.

Using 'this.$emit'.

Using 'this.$on'.

Using 'v-if'.

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 3/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is a Vue component's 'name' option used for?

Available answers

To specify styles for the component.

To define the component's data properties.

To declare the component's methods.

To provide an identifier for the component for debugging purposes.

The 'name' option in a Vue component provides an identifier primarily used for debugging and in tools like Vue DevTools. It also helps with recursive components.

Question 4/15

😊 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 'v-model'.

Use '@submit.prevent'.

Use ':class'.

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 5/15

😊 Your answer was correct 🙁 Your answer was incorrect

When would you use a 'watcher' in Vue.js?

Available answers

To define static properties.

To register global components.

To define component templates.

To respond to reactive data changes.

A 'watcher' in Vue.js is used to perform actions in response to changes in a reactive data property. Watchers are useful for async operations or when data changes require more complex logic.

Question 6/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the syntax for creating a computed property in Vue?

computed: {
  reversedMessage() {
    return this.message.split('').reverse().join('');
  }
}

Available answers

Using the 'computed' option.

Using the 'data' option.

Using the 'watch' option.

Using the 'methods' option.

Computed properties in Vue are defined within the 'computed' option of a component. They are cached based on their reactive dependencies and only re-evaluate when necessary. The provided code snippet shows an example of a computed property 'reversedMessage'.

Question 7/15

😊 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 the 'data' function.

Using the 'methods' option.

Within the prop definition using 'default'.

Using computed properties.

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 8/15

😊 Your answer was correct 🙁 Your answer was incorrect

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

Available answers

To specify the component's methods.

To define the component's HTML template.

To store component's data that can be reactive.

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 9/15

😊 Your answer was correct 🙁 Your answer was incorrect

What does the 'props' option in a Vue component do?

Available answers

Specifies the data that can be passed into the component from its parent.

Lists events emitted by the component.

Specifies the global state of the application.

Lists the CSS styles for the component.

The 'props' option in a Vue component is used to declare properties that can be passed from the parent component. These props allow the component to be more flexible and dynamic.

Question 10/15

😊 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 that styles differently depending on its parent.

A slot used for handling events.

A slot that cannot be overridden.

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

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 11/15

😊 Your answer was correct 🙁 Your answer was incorrect

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

Available answers

created

mounted

updated

destroyed

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 12/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you create a dynamic component in Vue?

<!-- Vue template -->
<component :is="currentComponent"></component>

Available answers

Using '<component :is="">'.

Using 'v-for'.

Using 'v-if'.

Using 'v-show'.

Dynamic components in Vue are created with the '' syntax. The 'is' attribute determines which component to render, allowing for dynamic rendering based on changing data.

Question 13/15

😊 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-model'.

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

Using 'v-show'.

Using 'v-if'.

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 14/15

😊 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 double curly braces ({{ }}).

Using the 'v-for' directive.

Using the 'v-bind' directive.

Using the 'v-model' directive.

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

Question 15/15

😊 Your answer was correct 🙁 Your answer was incorrect

How can you centrally manage your application's state in Vue.js?

Available answers

Using Vuex.

Using Vue Router.

Using Vue Components.

Using the 'data' function.

In Vue.js, the centralized state management can be achieved using Vuex, which is an official state management pattern + library for Vue.js applications.