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Vue.js Component Basics Quiz

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Question 1/15

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 2/15

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

Select your answer

Defining custom directives.

Managing global state across components.

Storing individual component states.

Adding new components dynamically.

Question 3/15

How do you loop through an array in a Vue template?

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

Select your answer

Using 'v-show'.

Using 'v-for'.

Using 'v-bind'.

Using 'v-on'.

Question 4/15

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 '@click'.

Using 'v-model:click'.

Question 5/15

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

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

Select your answer

Within the prop definition using 'default'.

Using computed properties.

Using the 'methods' option.

Using the 'data' function.

Question 6/15

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 'v-if'.

Using 'this.$on'.

Using 'this.$emit'.

Question 7/15

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

Select your answer

To define static properties.

To register global components.

To respond to reactive data changes.

To define component templates.

Question 8/15

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

Select your answer

created

updated

mounted

destroyed

Question 9/15

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 cannot be overridden.

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

A slot that styles differently depending on its parent.

Question 10/15

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

Select your answer

Lists events emitted by the component.

Lists the CSS styles for the component.

Specifies the global state of the application.

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

Question 11/15

How do you pass a string prop to a child component in Vue.js?

// Parent component template
<child-component :message="'Hello'" />

Select your answer

With 'v-bind:message'.

With 'v-if:message'.

With 'v-model:message'.

With 'v-on:message'.

Question 12/15

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

Select your answer

v-for

v-show

v-if

v-on

Question 13/15

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.create'.

Using 'Vue.component'.

Question 14/15

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 'active-class' attribute on .

Using 'v-show'.

Using 'v-model'.

Question 15/15

How do you handle form submissions in Vue.js?

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

Select your answer

Use 'v-if'.

Use '@submit.prevent'.

Use ':class'.

Use 'v-model'.

Your Results

You did not answer any questions correctly.

Your Answers

Question 1/15

😊 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 2/15

😊 Your answer was correct 🙁 Your answer was incorrect

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

Available answers

Defining custom directives.

Managing global state across components.

Storing individual component states.

Adding new components dynamically.

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 3/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you loop through an array in a Vue template?

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

Available answers

Using 'v-show'.

Using 'v-for'.

Using 'v-bind'.

Using 'v-on'.

The 'v-for' directive in Vue is used to render a list of items by iterating over an array. The code snippet shows how to loop through 'items' and render each 'item'.

Question 4/15

😊 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 '@click'.

Using 'v-model: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 5/15

😊 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

Within the prop definition using 'default'.

Using computed properties.

Using the 'methods' option.

Using the 'data' function.

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 6/15

😊 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 'v-if'.

Using 'this.$on'.

Using 'this.$emit'.

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 7/15

😊 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 respond to reactive data changes.

To define component templates.

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 8/15

😊 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

updated

mounted

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 9/15

😊 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 cannot be overridden.

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

A slot that styles differently depending on its parent.

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 10/15

😊 Your answer was correct 🙁 Your answer was incorrect

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

Available answers

Lists events emitted by the component.

Lists the CSS styles for the component.

Specifies the global state of the application.

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

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 11/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you pass a string prop to a child component in Vue.js?

// Parent component template
<child-component :message="'Hello'" />

Available answers

With 'v-bind:message'.

With 'v-if:message'.

With 'v-model:message'.

With 'v-on:message'.

You use 'v-bind' (or simply the colon ':') to pass props to a child component in Vue.js. In the code snippet, ':' is a shorthand for 'v-bind' and is binding the string 'Hello' to the 'message' prop.

Question 12/15

😊 Your answer was correct 🙁 Your answer was incorrect

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

Available answers

v-for

v-show

v-if

v-on

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 13/15

😊 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.create'.

Using 'Vue.component'.

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.

Question 14/15

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

Using 'v-show'.

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 15/15

😊 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-if'.

Use '@submit.prevent'.

Use ':class'.

Use 'v-model'.

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.