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Vue.js Basics
1/25
What are the advantages of using Vue.js?
Small in size — The size is 18 to 21KB. It requires no time for the user to download and apply it.
Easily understandable — One of the reasons for the popularity of this framework is that it is quite easy to understand. Users can easily add Vue.js to their web project due to its simple structure.
Straightforward integration- you can easily integrate it with the existing applications.
Virtual DOM — It is capable of using the virtual DOM like other existing frameworks such as ReactJS, Ember, and so on. Virtual DOM is considered a lightweight in-memory tree representation of the original HTML DOM and updated without impacting the origina
All of the above
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2/25
Which of the following directives is to used for attaching event listeners that invoke methods?
v-for
v-on
v-model
v-bind
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3/25
What data binding interpolation is commonly known as “Mustache” syntax?
[]
v-model
{{}}
v-on
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4/25
How to use for loop in Vue.js?
vFor
*v-for
v-for
*ngFor
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5/25
What is the correct way of installing the vue cli globally?
npm install vue-cli
npm install -g vue-cli
npm install vue-cli -global
npm install vue-cli -g
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6/25
What event modifier is used for performing the click event only for one time?
<a @click.once="dotask"></a>
<a @click.prevent-once="dotask"></a>
<a @click.stop="dotask"></a>
<a @click.passive="dotask"></a>
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7/25
V-show does not support the <template> element.
True
False
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8/25
All are life cycle hooks in Vue except ...
beforeCreate
created
mounted
beforeMount
didMount
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9/25
What is the purpose of the 'computed' property in Vue.js?
To store application state
To define methods
To define asynchronous operations
To calculate and return a value based on reactive dependencies
To interact with the DOM directly
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10/25
How can you pass data from a parent to a child component in Vue.js?
Using the $emit method
Using the $parent property
Using props
Using global state management
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11/25
How do you access a parent component's methods from a child component?
Using this.$parent.methodName()
Using this.$child.methodName()
Using Vue.parent.methodName()
This is not possible in Vue.js
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12/25
What is the default port number Vue CLI serves the application on?
3000
8080
8000
5000
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13/25
What is the role of the 'filters' feature in Vue.js?
For creating global mixins
For applying common text formatting
For filtering items in a v-for list
For validating form inputs
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14/25
What is the purpose of the 'provide' and 'inject' feature in Vue.js?
For server-side rendering
For passing data down the component tree without props
For managing global state
For integrating with third-party libraries
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15/25
Which lifecycle hook in Vue.js is called right after the DOM has been updated?
created
beforeUpdate
updated
mounted
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16/25
What does the 'v-once' directive do in Vue.js?
Listens to an event only once
Renders the element or component once and skips future updates
Applies a CSS class once
Executes a method only once
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17/25
What is the main use of the 'v-pre' directive in Vue.js?
To pre-load data before rendering a component
To skip compilation for this element and all its children
To give priority rendering to an element
To preserve the original state of an element
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18/25
What is the purpose of the 'name' property in a Vue.js component?
To specify the name used in the DOM
To define the component's name for recursive calls
To set the name attribute on the root element
To identify the component in Vue Devtools
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19/25
Which method is commonly used for manual reactivity in Vue.js?
Vue.set(object, key, value)
Vue.reactify(object, key, value)
this.$forceUpdate()
Vue.observable(object)
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20/25
In Vue.js, how does the 'v-model' directive work with a checkbox input?
It binds to the 'checked' property of the checkbox
It binds to the 'value' attribute of the checkbox
It toggles the 'disabled' state of the checkbox
It is not applicable for checkbox inputs
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21/25
Which Vue.js directive is used to bind an event listener to an element?
v-bind
v-model
v-on
v-for
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22/25
In Vue.js, what does the 'mounted' lifecycle hook represent?
The component is about to be mounted
The component has been inserted into the DOM
The component's data has been initialized
The component is about to be updated
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23/25
What is the primary use of the 'props' option in a Vue.js component?
To pass data to child components
To receive data from parent components
To store internal component state
To define computed properties
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24/25
In Vue.js, how do you emit an event from a child component to its parent?
this.$emit('eventName')
Vue.emit('eventName')
this.$parent.emit('eventName')
this.$dispatch('eventName')
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25/25
In Vue.js, what is the recommended way to pass data to a child component?
Using 'v-bind' to bind data to the child component's attributes
Directly setting properties on the child component instance
Using a global event bus
By modifying the child component's 'data' object
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