10 Quick-Fire Vue Interview Questions

Interview questions on Vue.js you should be prepared for

4 min readOct 22, 2020

If you are preparing for a Vue.js interview, then these are 10 quick-fire questions that you should be prepared to answer.

1. What is Vue.js?

Vue.js is frontend JavaScript framework for building user interfaces with a focus on single-page applications. It promotes “high decoupling” which makes it really easy for developers to create user interfaces and rapid prototyping.

2. What are the benefits of Vue.js?

Vue.js is lightweight and therefore highly performant. It is developer-friendly, hence easy to learn. It is highly flexible and has great tooling.

3. What is a Vue instance?

The Vue instance, often referred to as vm in a Vue application is the ViewModel of the MVVM pattern that Vue follows. The Vue instance is the root of a Vue application.

new Vue({
  render: h => h(App),
}).$mount(‘#app’)

A new Vue instance is created and mounted to an HTML element that contains the id #app.

4. What are the differences between v-if and v-show?

v-if will not render the element in the DOM if the expression evaluates to false. In the case of v-show, it will render the element in the DOM no matter what, but will be hidden if false. v-if supports v-else and v-else-if and can be used inside the <template> element, v-show does not support this.

5. What are Vue components?

Vue components are reusable Vue instances that have a name. They support the same properties as the root Vue instance such as data, methods, computed, watch, mixins, as well as the lifecycle methods (small variations to how it’s written in a component). Below is an example of a Vue component.

<template>
  <div>
    <p>{{ name }}</p>
  </div>
</template><script>
export default {
  name: ‘10 Quick-Fire Vue Interview Questions’
}
</script><style scoped>
p {
  padding: 10px;
  font-size: 30px;
}
</style>

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