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Vue.js Mixins and Custom Directives Quiz

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Question 1/15

In Vue.js, what does a mixin NOT typically include?

Select your answer

HTML templates

Data properties

Lifecycle hooks

Methods

Question 2/15

What type of data can Vue.js custom directives manipulate?

Select your answer

Component internal state.

HTTP response objects.

DOM elements and their attributes.

Vuex state.

Question 3/15

What command is used to start the Vue development server?

Select your answer

npm run serve

vue start

npm start vue

npm dev

Question 4/15

What benefit do Vue.js mixins provide?

Select your answer

They provide style encapsulation for components.

They improve routing efficiency.

They enable automatic form validation.

They allow sharing of reusable functionalities across components.

Question 5/15

What lifecycle hook is typically used for data-fetching operations?

Select your answer

updated

mounted

beforeDestroy

created

Question 6/15

What hook of a custom directive is used to update the directive when the bound VNode is updated?

Select your answer

bind

inserted

update

componentUpdated

Question 7/15

What is a mixin in Vue.js used for?

Select your answer

To create custom event handlers in Vue.js applications.

To extend Vue components with reusable functionalities.

To manage data binding in Vue components.

To define Vue.js lifecycle hooks.

Question 8/15

What is a key characteristic of Vue.js custom directives?

Select your answer

They automatically update data properties.

They are limited to dealing with Vue lifecycle hooks.

They provide additional functionality for DOM manipulation.

They are used to style Vue components.

Question 9/15

Which of the following is NOT true about Vue.js custom directives?

Select your answer

They consist of hooks to apply changes to the DOM.

They extend syntax similar to Vue's built-in directives.

They can manipulate the DOM directly.

They are used to handle asynchronous data fetching.

Question 10/15

Which Vue feature allows for parameterized custom directive usage, such as passing in different bind expressions?

Select your answer

HTML markup scripts.

Preprocessor directives.

Directive argument syntax using colons.

Template scoping methods.

Question 11/15

Which lifecycle hook is preferable to access DOM elements in a Vue component?

Select your answer

mounted

created

updated

beforeDestroy

Question 12/15

How are mixins included in the Vue instance treated in terms of lifecycle hooks?

Select your answer

The mixin's hooks overwrite the component's hooks.

Only after hooks from components are called.

Only the component's hooks are called.

Hooks from both the mixin and the component are called.

Question 13/15

How do you ensure a locally registered directive is used in a specific component?

Select your answer

By using a v-directive:component syntax.

By writing it in the component's styles.

By setting a directive in Vue.config.directives.

By registering it in the directives object of the component.

Question 14/15

Which function do you use to remove a global directive in Vue.js?

Select your answer

Vue.removeDirective()

Vue.directive('directiveName', undefined)

Vue.deleteDirective()

Vue.directive(null)

Question 15/15

Which method is used to define a global custom directive?

Select your answer

Vue.newDirective()

Vue.customDirective()

Vue.globalDirective()

Vue.directive()

Your Results

You did not answer any questions correctly.

Your Answers

Question 1/15

😊 Your answer was correct 🙁 Your answer was incorrect

In Vue.js, what does a mixin NOT typically include?

Available answers

HTML templates

Data properties

Lifecycle hooks

Methods

Mixins typically do not include HTML templates. They are used to share JavaScript functionalities such as data properties, methods, and lifecycle hooks among components.

Question 2/15

😊 Your answer was correct 🙁 Your answer was incorrect

What type of data can Vue.js custom directives manipulate?

Available answers

Component internal state.

HTTP response objects.

DOM elements and their attributes.

Vuex state.

Custom directives in Vue.js are designed to manipulate DOM elements and their attributes directly, providing dynamic functionality beyond the Vue built-in directives.

Question 3/15

😊 Your answer was correct 🙁 Your answer was incorrect

What command is used to start the Vue development server?

Available answers

npm run serve

vue start

npm start vue

npm dev

The command

npm run serve

is used to start the development server for a Vue.js application when using the Vue CLI.

Question 4/15

😊 Your answer was correct 🙁 Your answer was incorrect

What benefit do Vue.js mixins provide?

Available answers

They provide style encapsulation for components.

They improve routing efficiency.

They enable automatic form validation.

They allow sharing of reusable functionalities across components.

Vue.js mixins are primarily used for sharing and reusing functionalities like methods, data properties, and lifecycle hooks across multiple components.

Question 5/15

😊 Your answer was correct 🙁 Your answer was incorrect

What lifecycle hook is typically used for data-fetching operations?

Available answers

updated

mounted

beforeDestroy

created

The

created

lifecycle hook is often used for asynchronous operations such as data fetching, because it occurs before the template is mounted, allowing fetched data to be ready for the initial render.

Question 6/15

😊 Your answer was correct 🙁 Your answer was incorrect

What hook of a custom directive is used to update the directive when the bound VNode is updated?

Available answers

bind

inserted

update

componentUpdated

The

update

hook is called whenever the VNode is updated, letting you react to changes and apply necessary updates to the directive.

Question 7/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is a mixin in Vue.js used for?

Available answers

To create custom event handlers in Vue.js applications.

To extend Vue components with reusable functionalities.

To manage data binding in Vue components.

To define Vue.js lifecycle hooks.

Mixins in Vue.js allow you to define reusable functionalities that can be distributed across multiple components. This helps in keeping your code DRY (Don't Repeat Yourself).

Question 8/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is a key characteristic of Vue.js custom directives?

Available answers

They automatically update data properties.

They are limited to dealing with Vue lifecycle hooks.

They provide additional functionality for DOM manipulation.

They are used to style Vue components.

Custom directives in Vue.js are used to extend the HTML, providing additional functionalities that can directly manipulate the DOM, beyond what is available with built-in directives.

Question 9/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which of the following is NOT true about Vue.js custom directives?

Available answers

They consist of hooks to apply changes to the DOM.

They extend syntax similar to Vue's built-in directives.

They can manipulate the DOM directly.

They are used to handle asynchronous data fetching.

Vue.js custom directives are primarily concerned with manipulating the DOM and do not handle data fetching, which is typically managed in components or Vuex.

Question 10/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which Vue feature allows for parameterized custom directive usage, such as passing in different bind expressions?

Available answers

HTML markup scripts.

Preprocessor directives.

Directive argument syntax using colons.

Template scoping methods.

In Vue.js, directive arguments are specified using colon syntax, allowing for parameterized use of custom directives for dynamic behavior changes.

Question 11/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which lifecycle hook is preferable to access DOM elements in a Vue component?

Available answers

mounted

created

updated

beforeDestroy

The

mounted

lifecycle hook is called after the component is mounted onto the DOM, making it the ideal place to access DOM elements.

Question 12/15

😊 Your answer was correct 🙁 Your answer was incorrect

How are mixins included in the Vue instance treated in terms of lifecycle hooks?

Available answers

The mixin's hooks overwrite the component's hooks.

Only after hooks from components are called.

Only the component's hooks are called.

Hooks from both the mixin and the component are called.

In Vue.js, lifecycle hooks in mixins are merged with the component's hooks, and both are called whenever the hook is run, with the component's hook being called after the mixin's.

Question 13/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you ensure a locally registered directive is used in a specific component?

Available answers

By using a v-directive:component syntax.

By writing it in the component's styles.

By setting a directive in Vue.config.directives.

By registering it in the directives object of the component.

To register a local directive in Vue.js, you define it in the component's

directives

option, ensuring it is only accessible within that component.

Question 14/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which function do you use to remove a global directive in Vue.js?

Available answers

Vue.removeDirective()

Vue.directive('directiveName', undefined)

Vue.deleteDirective()

Vue.directive(null)

To remove a global directive in Vue.js, you can pass

undefined

as the second argument to

Vue.directive()

, like so:

Vue.directive('directiveName', undefined)

Question 15/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which method is used to define a global custom directive?

Available answers

Vue.newDirective()

Vue.customDirective()

Vue.globalDirective()

Vue.directive()

Global custom directives in Vue.js are defined using the

Vue.directive()

method.