Splendid Vue Test - 60+ MCQs: Vue.js test: Evaluate Your Vue.js Knowledge with Vue Questions and Answers

1. What is the purpose of the 'v-if' directive in Vue.js?

Rendering a list

Conditionally rendering content

Two-way data binding

Handling events

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

v-conditional

v-show

v-if-else

v-render

3. Which lifecycle hook is called after the component is inserted into the DOM?

created

mounted

updated

destroyed

4. What is the purpose of the 'functional' component option in Vue.js? Provide an example scenario where using a functional component is beneficial.

The 'functional' component option is used for stateless, presentational components. An example scenario is when you have a component that doesn't need to maintain internal state and is purely based on props.

Functional components in Vue.js are primarily for handling routing. An example scenario is when you want to create stateless components for different routes.

The 'functional' component option is used for styling in Vue.js. An example scenario is when you want to create components exclusively for applying styles to specific elements.

Functional components in Vue.js are specifically for handling user input. An example scenario is when you want to create dynamic and visually appealing form interactions.

5. Explain the role of Vue.js Directives in the framework. Provide a scenario where using a custom directive would be beneficial.

Vue.js Directives are markers on the DOM elements that tell Vue.js to do something to a DOM element. A scenario is creating a custom directive for lazy loading images to improve page loading performance.

Directives in Vue.js are mainly for defining methods. A scenario is when you want to encapsulate complex logic within a directive.

Vue.js Directives are exclusive to styling. A scenario is when you need to apply advanced styles to specific elements in your application.

Directives in Vue.js are primarily for handling form validations. A scenario is when you want to add custom validation rules to form elements.

6. What does Vue.js use to update the DOM efficiently?

Virtual DOM

Shadow DOM

Dynamic DOM

Real DOM

7. In Vue.js, what is the purpose of the 'v-slot' directive?

Render a slot machine

Define named slots in a component

Include an external slot file

Handle slot events

8. How can you handle user click events in Vue.js?

Using the v-click directive

Using the v-on directive

Using the v-event directive

Using the v-handler directive

9. How can you bind a class dynamically in Vue.js?

Using the 'v-if' directive

Using the 'v-for' directive

Using the 'v-bind:class' directive

Using the 'v-model' directive

10. In Vue.js, what does the 'el' option in the Vue instance represent?

Element

Event Listener

Endpoint

Element List

11. In Vue.js, what is the key benefit of using computed properties?

They are reactive and update automatically

They improve component styling

They simplify event handling

They enable dynamic component loading

12. What is the purpose of the 'v-bind' directive in Vue.js?

Conditionally binding class

One-way data binding

Two-way data binding

Rendering a list

13. In Vue.js, what is the purpose of the 'v-show' directive?

To create a conditional statement

To loop over an array or object

To show or hide elements based on a condition

To define a custom directive

14. What is the purpose of the 'errorCaptured' lifecycle hook in Vue.js? Provide an example scenario where using errorCaptured is beneficial.

The 'errorCaptured' lifecycle hook is used to capture and handle errors in the component and its children. An example scenario is when you want to log errors to a server or display a user-friendly error message.

ErrorCaptured in Vue.js is exclusively for handling user authentication errors. An example scenario is when you want to capture and handle errors related to user authentication.

The 'errorCaptured' lifecycle hook is used for server-side rendering. An example scenario is when you want to capture errors during the server-side rendering process.

ErrorCaptured in Vue.js is primarily for handling AJAX request errors. An example scenario is when you want to capture errors related to asynchronous API calls.

15. How can you handle user input in Vue.js?

Using the 'v-model' directive

Using the 'v-if' directive

Using the 'v-bind' directive

Using the 'v-for' directive

16. In Vue.js, what is the purpose of the 'v-for' directive?

Conditional rendering

Two-way data binding

Looping over an array

Event handling

17. What is the core library of Vue.js for building user interfaces?

Vue Core

Vue.js UI

VueDOM

Vue Router

18. What is the purpose of the 'v-pre' directive in Vue.js?

Prevent template compilation

Prevent data binding

Prevent rendering

Prevent event handling

19. What does Vue.js use to handle transitions between elements?

v-transition

v-animate

v-effect

v-move

20. In Vue.js, what is the purpose of the 'v-model' directive?

Conditional rendering

Two-way data binding

Looping over an array

Event handling

21. In Vue.js, how can you handle user input using v-model?

By creating a custom method

By using the v-on directive

By using the v-input directive

By binding a data property

22. Which Vue.js feature is used for routing in a single-page application?

Vue Router

Vuex

Vue Components

Vue Directives

23. What is the purpose of the 'v-once' directive in Vue.js?

Enable one-time data binding

Enable one-time rendering

Enable one-time event handling

Enable one-time template compilation

24. What is the purpose of Vue.js Transitions? Provide an example scenario where using transitions would be beneficial.

Vue.js Transitions are used for animating elements during state changes. An example scenario is when you want to smoothly transition the appearance or disappearance of elements in your application.

Transitions in Vue.js are exclusive to routing. An example scenario is when you want to add animation effects to page transitions.

Vue.js Transitions are specifically for handling user input. An example scenario is when you want to create dynamic and visually appealing form interactions.

Transitions in Vue.js are primarily for handling server requests. An example scenario is when you want to animate the loading and unloading of data.

25. What is the purpose of the 'mixins' option in a Vue.js component?

To define methods

To handle user input

To perform asynchronous operations

To reuse component logic across multiple components

26. Explain the concept of Vue.js Mixins and provide a use case where they are particularly beneficial.

Mixins allow you to reuse component logic. A use case is when you have common functionality needed across multiple components, such as authentication or logging.

Mixins are used to create custom directives. A use case is when you want to extend the functionality of Vue.js directives.

Mixins are exclusive to styling in Vue.js. A use case is when you need to apply complex styles to components.

Mixins are primarily for handling asynchronous operations. A use case is when you need to manage complex asynchronous tasks in your components.

27. Which directive is used for two-way data binding in Vue.js?

v-link

v-model

v-bind

v-data

28. Which Vue.js directive is used for binding an attribute to an expression?

v-attr

v-bind

v-expression

v-attribute

29. How can you pass data from a parent component to a child component in Vue.js?

Using props

Using v-model

Using computed properties

Using refs

30. What is the purpose of Vue.js Dynamic Components? Provide an example scenario where using dynamic components is beneficial.

Vue.js Dynamic Components allow you to switch between different components dynamically. An example scenario is when you have a tabbed interface, and you want to load different components based on the selected tab.

Dynamic Components in Vue.js are exclusively for handling form validations. An example scenario is when you want to dynamically render form validation components based on user interactions.

Vue.js Dynamic Components are used for styling. An example scenario is when you want to dynamically apply styles to different components based on user actions.

Dynamic Components in Vue.js are primarily for handling user authentication. An example scenario is when you want to dynamically render authentication components based on user login status.

31. In Vue.js, what is the purpose of the 'computed' property?

To define methods

To handle user input

To perform asynchronous operations

To compute derived data based on reactive dependencies

32. What is the Vue.js directive used for event handling?

v-event

v-handle

v-on

v-trigger

33. In Vue.js, what is the purpose of the 'ref' attribute?

To create a conditional statement

To loop over an array or object

To define a custom directive

To get a reference to a child component or element

34. How can you include external content in a Vue.js component?

Using the v-external directive

Using the import statement

Using the require function

Using slots or props

35. What is the purpose of the 'nextTick' method in Vue.js?

To create a conditional statement

To loop over an array or object

To handle user input

To perform asynchronous operations

36. Explain the purpose of the 'async' attribute in Vue.js Dynamic Components. Provide an example scenario where using the 'async' attribute is beneficial.

The 'async' attribute in Vue.js Dynamic Components is used to load components asynchronously. An example scenario is when you have large components that should be loaded lazily to improve initial page load performance.

The 'async' attribute is exclusively for handling user input in Vue.js. An example scenario is when you want to asynchronously handle user interactions within a dynamic component.

The 'async' attribute in Vue.js Dynamic Components is used for server-side rendering. An example scenario is when you want to asynchronously load components during the server-side rendering process.

The 'async' attribute is primarily for handling AJAX requests in Vue.js. An example scenario is when you want to asynchronously fetch data for a dynamic component from the server.

37. What is the purpose of the 'filters' in Vue.js?

To filter elements in an array

To format text in templates

To define methods

To create a conditional statement

38. What is the purpose of the 'transition' component in Vue.js?

To create a conditional statement

To animate elements during transitions

To loop over an array or object

To define a custom directive

39. What does Vue CLI stand for?

Command Line Interface

Component Level Integration

Client Library Integration

Cascading Language Integration

40. What is the purpose of the 'scoped' attribute in Vue.js style tags?

To create a conditional statement

To scope styles to the current component

To loop over an array or object

To define a custom directive

Vue.js MCQ Test 2