Vue.js Component Basics Quiz

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Question 1/15

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

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Question 2/15

How do you create a dynamic component in Vue?
<!-- Vue template -->
<component :is="currentComponent"></component>

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Question 3/15

What is the purpose of the 'mounted' lifecycle hook in Vue?

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Question 4/15

How do you conditionally apply CSS classes in Vue?
<!-- Vue template -->
<div :class="{ active: isActive, 'text-danger': hasError }"></div>

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Question 5/15

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

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Question 6/15

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

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Question 7/15

What does the 'transition' element do in Vue.js?
<transition name="fade">
  <p v-if="show">Hello</p>
</transition>

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Question 8/15

How do you bind an event listener to a button click in Vue?
<!-- Vue template -->
<button @click="handleClick">Click me</button>

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Question 9/15

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

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Question 10/15

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>

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Question 11/15

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

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Question 12/15

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

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Question 13/15

How can you specify a default value for a prop in Vue.js?
props: {
  myProp: {
    type: String,
    default: 'Default Value'
  }
}

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Question 14/15

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

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Question 15/15

Which directive would you use to two-way bind a data property to an input element?
<!-- Vue template -->
<input v-model="username" />

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Your Answers

Question 1/15
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What does the 'props' option in a Vue component do?

Available answers

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 2/15
😊 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

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 3/15
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What is the purpose of the 'mounted' lifecycle hook in Vue?

Available answers

The 'mounted' lifecycle hook is called after a Vue instance's component has been added to the DOM. It's commonly used for operations that require the component's elements to be present in the DOM.
Question 4/15
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How do you conditionally apply CSS classes in Vue?
<!-- Vue template -->
<div :class="{ active: isActive, 'text-danger': hasError }"></div>

Available answers

To conditionally apply CSS classes in Vue, you can use the ':class' binding. The provided code snippet shows how to apply 'active' and 'text-danger' classes based on the 'isActive' and 'hasError' conditions.
Question 5/15
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How do you bind a JavaScript variable to an HTML element in a Vue template?

Available answers

In Vue templates, you use the double curly braces ({{ }}) to bind JavaScript expressions to HTML elements. This is known as interpolation.
Question 6/15
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What is a Vue component's 'name' option used for?

Available answers

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 7/15
😊 Your answer was correct 🙁 Your answer was incorrect
What does the 'transition' element do in Vue.js?
<transition name="fade">
  <p v-if="show">Hello</p>
</transition>

Available answers

The 'transition' element in Vue.js is used to apply CSS transitions and animations to elements entering or leaving the DOM. The provided snippet wraps a transitioning paragraph with the 'fade' transition.
Question 8/15
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How do you bind an event listener to a button click in Vue?
<!-- Vue template -->
<button @click="handleClick">Click me</button>

Available answers

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 9/15
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What is a Vuex store used for in a Vue.js application?

Available answers

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 10/15
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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

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 11/15
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What is the purpose of the 'data' function in a Vue component?

Available answers

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 12/15
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What is a Vue component's 'template' option used for?

Available answers

The 'template' option in a Vue component is used to define the component's HTML structure. It describes how the component should render based on its data.
Question 13/15
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How can you specify a default value for a prop in Vue.js?
props: {
  myProp: {
    type: String,
    default: 'Default Value'
  }
}

Available answers

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

Available answers

In Vue.js, the centralized state management can be achieved using Vuex, which is an official state management pattern + library for Vue.js applications.
Question 15/15
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Which directive would you use to two-way bind a data property to an input element?
<!-- Vue template -->
<input v-model="username" />

Available answers

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.