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Vue.js Basics

1/25 If you use .passive and .prevent together, .prevent will be ignored. Probably, it will show you a warning.
- True
- False
2/25 What data binding interpolation is commonly known as “Mustache” syntax?
- []
- v-model
- {{}}
- v-on
3/25 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>
4/25 V-show does not support the <template> element.
- True
- False
5/25 How $parent is described in Vue?
- The $parent property, like $root, can be used for accessing the parent instance from a child.
- It provides direct access, making the application hard to test and debug.
- Both of the options above are true.
- None of the above is true.
6/25 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
7/25 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
8/25 In Vue.js, how do you iterate over an array of items in a template?
- Using the 'v-if' directive
- Using the 'v-for' directive
- Using the 'v-model' directive
- Using the 'v-bind' directive
9/25 What is the purpose of the 'v-bind' directive in Vue.js?
- To bind class and style properties
- To bind DOM properties to data
- To display text content
- To define methods for event handling
10/25 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
11/25 How can you make a Vue.js component reactive to changes in an object that was not reactive initially?
- Using Vue.set(object, key, value)
- This is not possible in Vue.js
- By reassigning the object
- Using object.key = value
12/25 What is the purpose of the 'key' attribute in a v-for directive in Vue.js?
- To provide a unique identifier for each element
- To optimize list rendering
- To define the order of elements
- To bind data to list items
13/25 In Vue.js, what is the purpose of the 'v-cloak' directive?
- To conditionally render elements
- To delay the rendering of a component
- To prevent flickering of uncompiled content
- To cloak sensitive data
14/25 What is the main purpose of using 'slots' in Vue.js components?
- To inject content into a component from its parent
- To manage global state
- To store data
- To perform data binding
15/25 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
16/25 In Vue.js, which is the correct way to register a local component?
- Vue.component('my-component', {})
- components: {'my-component': {}}
- Vue.register('my-component', {})
- Vue.use('my-component', {})
17/25 In Vue.js, how can you access the root Vue instance within a component?
- this.$root
- Vue.$root
- this.$parent.root
- this.root
18/25 What is the purpose of the 'static' keyword in a Vue.js component?
- To create a static method in a component
- To prevent reactivity on a property
- To indicate that a property should not be included in the template
- To make a property globally accessible
19/25 Which Vue.js feature is used to transform props into local, reactive data?
- Computed properties
- Watchers
- Data properties
- Props down, events up
20/25 What is the correct way to declare a reactive property in a Vue.js component that is not part of the data object?
- Vue.reactiveProperty('newProp')
- this.$set(this, 'newProp', value)
- this.newProp = Vue.observable(value)
- Vue.defineProperty(this, 'newProp', { value })
21/25 Which method is commonly used for manual reactivity in Vue.js?
- Vue.set(object, key, value)
- Vue.reactify(object, key, value)
- this.$forceUpdate()
- Vue.observable(object)
22/25 Which Vue.js directive is used to bind an event listener to an element?
- v-bind
- v-model
- v-on
- v-for
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
24/25 What is the role of the 'key' attribute in a Vue.js 'v-for' loop?
- To provide a unique identifier for each element in the loop
- To define the index of each item in the loop
- To increase performance by reusing elements
- To specify the loop's execution order
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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