Vue.js Directives and Filters Quiz

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Question 1/15

What is the main difference between v-if and v-show directives?

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Question 2/15

Given an object data binding, which directive allows you to watch the key count dynamically?

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Question 3/15

Which Vue.js directive would you use to add a click event on a button?

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Question 4/15

How does the Vue.js v-for directive work?

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Question 5/15

What syntax allows you to access and modify the value of a component property within the parent context using v-model?

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Question 6/15

How can you pass multiple event handlers to a single element in Vue.js?
<div v-on="{ mouseup: onMouseUp, touchend: onTouchEnd }"></div>

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Question 7/15

Which directive would you use to conditionally apply a CSS class to an element in Vue.js?

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Question 8/15

What is the correct method to parse a list of numbers and double each number using Vue filters?
Vue.filter('double', function(value) {
  return value.map(num => num * 2);
})

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Question 9/15

What is the purpose of using the v-pre directive in a Vue.js template?

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Question 10/15

Which of these is NOT a valid directive in Vue.js?

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Question 11/15

When using v-for to iterate over an object, what does the second argument in the loop represent?

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Question 12/15

How can you dynamically apply inline styles to a Vue component?

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Question 13/15

How does the Vue.js v-once directive affect component reactivity?

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Question 14/15

Which directive allows you to bind an element attribute to a Vue.js variable or expression?

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Question 15/15

When applying a Vue filter, which syntax is correct for usage in a template context?

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Your Answers

Question 1/15
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What is the main difference between v-if and v-show directives?

Available answers

v-if
removes the element from the DOM if the condition is false, whereas
v-show
only toggles the element's CSS display property.
Question 2/15
😊 Your answer was correct 🙁 Your answer was incorrect
Given an object data binding, which directive allows you to watch the key count dynamically?

Available answers

v-for
allows iteration over the object keys, making it useful to respond to changes in key count.
Question 3/15
😊 Your answer was correct 🙁 Your answer was incorrect
Which Vue.js directive would you use to add a click event on a button?

Available answers

The
v-on
directive is used to listen for DOM events like clicks. It binds the click event to a Vue method.
Question 4/15
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How does the Vue.js v-for directive work?

Available answers

v-for
is used to render a list of items by iterating over an array or object and allows access to each item and its index during iteration.
Question 5/15
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What syntax allows you to access and modify the value of a component property within the parent context using v-model?

Available answers

Using
v-model="$parent.propertyName"
, you can directly bind and update a variable defined at the parent level from the child component.
Question 6/15
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How can you pass multiple event handlers to a single element in Vue.js?
<div v-on="{ mouseup: onMouseUp, touchend: onTouchEnd }"></div>

Available answers

With
v-on
, you can bind multiple handlers by using an object syntax, for example, binding both mouse and touch end events.
Question 7/15
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Which directive would you use to conditionally apply a CSS class to an element in Vue.js?

Available answers

v-bind:class
allows for binding a CSS class conditionally based on the return value of a JavaScript expression.
Question 8/15
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What is the correct method to parse a list of numbers and double each number using Vue filters?
Vue.filter('double', function(value) {
  return value.map(num => num * 2);
})

Available answers

You can register a filter using
Vue.filter
and apply it in templates with the
|
operator to transform data such as doubling numbers in a list.
Question 9/15
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What is the purpose of using the v-pre directive in a Vue.js template?

Available answers

v-pre
skips compilation for the element and its children, which can be useful to handle raw items like code snippets.
Question 10/15
😊 Your answer was correct 🙁 Your answer was incorrect
Which of these is NOT a valid directive in Vue.js?

Available answers

v-copy
is not a valid directive in Vue.js. The valid directives are
v-if
,
v-for
,
v-model
,
v-show
, etc.
Question 11/15
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When using v-for to iterate over an object, what does the second argument in the loop represent?

Available answers

When using
v-for
to iterate over objects, the second argument specifies the key of each property in the object.
Question 12/15
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How can you dynamically apply inline styles to a Vue component?

Available answers

v-bind:style
is used to apply inline styles dynamically with binding to data properties or expressions.
Question 13/15
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How does the Vue.js v-once directive affect component reactivity?

Available answers

v-once
makes an element unreactive after the initial render, preserving the performance of static content.
Question 14/15
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Which directive allows you to bind an element attribute to a Vue.js variable or expression?

Available answers

v-bind
is used to bind HTML attribute values to data properties or computed properties in Vue.js.
Question 15/15
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When applying a Vue filter, which syntax is correct for usage in a template context?

Available answers

Use
{{ message | capitalize }}
to apply Vue filters directly within a template to format data.