For those people who are new to the framework, navigating through vue js interview questions is not an easy task. Whether you have just finished college or you are a regular developer, one thing that you have to understand is that preparing for these technical interviews is necessary if one wants to show his abilities and secure their dream job. In this article, we will discuss certain vital vue js interview questions that you should be aware of and get some answers on how to ace them irrespective of your experience level – from someone coming straight out of college to senior pros.

Interview questions vuejs for freshers

As a fresher you may not be familiar with vue js framework and the questions about it, that’s why we prepared more than vue js 3 interview questions to make sure you can pass your interview. Here are the best vue js interview questions for freshers:

1- What is Vue.js?

Vue.js is a JavaScript framework which can be used to develop user interfaces and dynamic single page web applications.

2-Is Vue.js not supported by most browsers? True or False?

False, it is supported by virtually all browsers the majority of times.

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3- Give some features of Vue.js

Here are some of the features associated with Vue.js. Things like:

• templates
• event handling
• routing
• data binding
• light weightness
• easy integration etc..

4- What does filter mean in Vue.js?

A filter is a Java Script function that alters data output to the browser.

5- Why do we use v-for directive in Vue.js?

v-for directive is just one among the many built-in directives provided by the Vue library for iterating over an array or object.

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6- How does a VUE instance get created in VUE.JS?

The creation of a new instance of Vue can be done via the use of new keyword along side the call to an instance constructor, available as Vue() (Vue function).

var ab = newVue({……………….})

7- Can we create custom filters in vue js?

Yes, such filters are called custom filters in vue js because they have been manually defined there.

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8- Tell some of the Vue.js built-in directives.

There are many other built-in directives in Vue.js including v-for, v-show, v-if, and so on.

9- What is ‘const’ used for in Vue.js?

The purpose of “const” is to generate constants.

10- Enumerate a few alternatives to Vue.js

Some of these include React, Angular jQuery Bootstrap etc.

11- What is meant by Virtual DOM?

Virtual DOM is Javascript representation of Document Object Model (DOM) but light weight.

12- Does Vue.js support two way communication?

Yes it does.

13- Mention some popular sites that use Vue.js.

Trivago, Netflix, Adobe, Facebook, Gitlab and Grammarly among others.

14- Which directive enables one-way data binding in Vue.js?

The one-way data flow or one-way data binding in vue can be made possible through the use of the v-bind directive.

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15- Which in-built Vue.js directive is used to create two-way bindings?

v-model directive is used for creating two-way bindings in Vue.js.

16- What is Mixin in Vue.js?

Mixin is a preferable way of distributing reusable facilities across Vue components.

17- Are filters used in Vue 3?

No, the filters are removed from Vue 3.x and it implies that the latest version of Vue.js has no filters;

18- Are filters reusable in Vue?

Yes, filters can be reused in vue.

19- Why is Vue.js so fast?

Vue.js works faster than other JavaScript frameworks because it was developed with lightweight virtual DOM involved.

If you have more experience, then you need some complicated vue js interview questions which you can find next.

vue interview questions for intermediate

If you have some experience and looking for vue js interview questions for 3 years experience or less, then these vue js interview questions would be a great help for you:

20- Can we call REST API from vue js?

Yes, Axios library helps us to make REST Api call which enables us to call a REST API from veus JS.

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21- Mention some array change detection & mutation methods in vue.js.

This would be one of the vue js interview questions that you can answer by this:

push(), pop(), shift() slice(), sort() and many others are some commonly known methods within the scope of vue js.

22- What are key modifiers in Vue.js?

Some of the key modifiers include: esc, space, tab and delete among others that are present

23- List out some event modifiers available with vuejs.

• stop
• capture
• self
• once
• passive et cetera

24- Can you explain the differences between both v-show and v-if directives in Vue.js?

While v-show makes an element conditionally visible, v-if actually creates or destroys elements based on a condition.

25- Name some mouse event modifiers for Vue.js.

Below are some of the Vue.js mouse event modifiers. This includes:

• left
• right
• middle

26- Decipher what $parent property does in Vue.js.

$parent property allows the child to access its parent instances just like $root Property.

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27- What is a global component in Vue.js?

In Vue.js, any component can be registered as a global component such that it can be accessed from anywhere within the application.

28- What is a local component in Vue.js?

One of the vue js interview questions the you maybe asked is about component, you can answer stating that:

In Vue.js, any component can be registered as a local component so that it can only be used there where it was registered and accessed elsewhere.

29- How many components are there in Vue?

Vue has three different types of components which include templates, stylesheets, and scripts.

30- What is the purpose of $child property in Vue.js?

$Child property allows developers to access the child instance as does $parent.

31- Which are some of the benefits of using Vue.js

There are several advantages that come with using Vue.js.

• Easy Integrations
• User-Friendly Interface
• Better Performance
• Easy Learning Curve
• Reliable, among others

32- List out the conditional directives

v-if, v-else, v-else-if, etc are examples of conditional directives provided by VUE.JS.

33- What is Vue-loader?

It is a webpack loader for vue.js single file component.

34- Explain the reactivity system in Vue.js.

The reactivity system in Vue.js refers to converting plain JavaScript objects into reactive proxies.

35- What are refs in Vue.js?

These are used for indicating references to other HTML elements or child elements.

36- Can you explain How to add more features for any application in Vue.js?

One may also go for using the plugins available on vueplugins.org

37- Which directive in vue js is used to update elements of textContext with our data?

By using v-text directive, we can then update elements of textContext with our data .

vue js interview questions for experienced

This collection of vuejs interview questions would be great for those who have experience. Find the best vue js interview questions  that can help you in your next interview:

38- What is the watchman in Vue.js?

The mechanism with which one can witness modifications occurring from data as one is doing some operations on the structuring of that data.

39-Which one out of the built-in directives we have in Vue.js allows us to assign values to HTML attributes and change style?

v-bind directive provides a way to assign values to HTML attributes, change style, and assigning classes.

40- What is vue-router useful for?

• It relates browser URL with Vues’
• Components.

41- Give different types of directives in Vue.js

There are various types of directives found in Vue.js because; they include

• Empty Directive
• Literal Directive
• General Directive,
• and Custom Directive

42- What is one advantage of using mixins in Vue.js?

Mixins offer an advantage in that reusable features can be shared between them when they are used within a program.

43- Name all the life cycle events of a Vue instance in Vue.js.

Here are steps or events observed during lifecycle of the actual Vue instance beforeCreate event created event beforeMount event mounted event beforeUpdate event updated event beforeDestroy event destroy event

44- Why do we use navigation guards in vue.js?

The navigation guards are utilized by vue routers so as to guide routes either through redirecting them or by stopping them from happening at all.

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45- What does Vue.js instant prototyping imply?

Vue.js introduces a fresh functionality like instant prototyping that enables creation of components from anywhere on the machine and previews them.

46- What is a Component in Vue.js?

Component is one of the main feature in Vue.js .These components are used to extend the basic HTML elements into reusable code. It also can be registered as local and global components using two different ways.

47- What are async components in Vue?

Asynchronous components in Vue.js are components that usually separate the loading process of a component for fast loading.

48- What is dynamic route matching?

Dynamic routing allows you to set up routes with dynamic segments, allowing flexible and parameterized URL handling in Vue.js.

49- How can you create duplicate virtual nodes in a component?

By using cloneNode() method, you can duplicate virtual nodes inside a Vue component.

50- What are some common sources of memory leaks in Vue apps?

Event listeners, circular references, improper cleanup of resources are some of the common sources of memory leaks in vue apps.

51- What are some best practices to follow to create an accessible Vue application?

To make accessible Vue applications it is advisable to use well defined and meaningful HTML tags, have proper labeling with focus management, adhering to WCAG guidelines.

52- What is namespacing in vue?

In Vue name spacing is a technique used to divide store modules by avoiding naming collisions thus making them more maintainable.

53- What are modules in vue?

Each Vuex module is a self-sufficient unit consisting of states, mutations, actions and getters which makes it easy to build modular scalable Vuex architecture.

54- What are Composition API in Vue?

Vue composition API is an alternative way of organizing and reusing component logic making it more flexible and testable as compared to options API

55-What are the different ways to add animations in a Vue application?

There are several ways animations can be added to a Vue app including using CSS transitions/animations, JavaScript-based animations or third-party animation libraries.

56- What are some common techniques to optimize your Vue application?

Some common techniques on how you can optimize a vue application include; code splitting lazy loading performance budgeting efficient state management

FAQs

Is it difficult to learn Vue.js?

No, it’s not difficult learning Vue.js.

Is React better than Vue.js?

Yes, its performance and stability makes it better than React.

Should I learn Vue in 2024?

Definitely it worth, that’s due the need for web developers and their ability to develop different applications using open-source frameworks such as VUE.JS

Is Vue a framework or a library?

Vue is actually a JavaScript framework rather than being just a library.

To become a successful Vue.js developer, becoming good at answering vue js interview questions is very important. As a result of mastering the key concepts, advanced features, as well as best practices in the framework, one can effectively demonstrate their expertise and get hired in their preferred organization. Hence success lies not only in memorizing responses but understanding principles behind these answers and utilizing them appropriately in real life situations. Good luck with your Vue.js Interviews!