Best Vue.js Practice Questions to Ace Your Next Interview

Introduction

“Code isn’t just written—it’s lived, debugged, and celebrated.” – Me, after too much coffee

Let me set the scene: I’m in an interview, heart racing, and the recruiter slides over a laptop with a Vue.js coding challenge. “Fix this component,” they say. I freeze for a split second, but then my practice kicks in, and I’m typing like I was born for this. That’s the power of prepping with Vue.js practice questions. Vue.js, the framework behind slick apps for companies like GitLab, isn’t just about knowing the syntax—it’s about solving real problems fast. With 1.5 million weekly downloads on npm, it’s a skill that can open big doors.

This blog’s all about the best Vue.js practice questions to get you ready for your next interview. I’ve been there, sweating through coding tests, and I’m sharing my favorite questions, tips, and a few stories to keep it real. Whether you’re new to Vue.js or a seasoned coder, these questions will boost your Vue.js interview skills and make you feel like a coding superhero. Let’s jump in!

Why Practice Questions Are Your Interview Lifeline

Vue.js is like that friend who’s easy to hang with but has hidden depths. It’s lightweight, reactive, and a joy to code with, but interviews? They’re a whole different beast. You’re not just explaining computed properties—you’re debugging live or building components on the spot. Vue.js practice questions are like your personal coach, helping you:

Crank out clean, reactive components
Untangle Vuex state messes
Speed up apps with lazy loading
Debug lifecycle hooks without breaking a sweat

I learned this the hard way. My first Vue.js interview was a disaster—I flubbed a simple v-for question because I hadn’t practiced enough. Now, I treat practice questions like my morning coffee: non-negotiable. They’re your chance to mess up in private so you can shine in public.

My Top Vue.js Practice Questions for Interviews

1. How Does Vue.js Reactivity Work?

Question: Describe Vue.js’s reactivity system and build a component that updates a counter on button clicks.

Why It’s Asked: Reactivity is Vue’s heart, and interviewers want to see you get it.

Sample Solution:

				
					
  <div>
    <p>Counter: {{ count }}</p>
    <button>Add One</button>
  </div>


export default {
  data() {
    return { count: 0 };
  },
  methods: {
    increment() {
      this.count++;
    }
  }
};

What’s Going On: Vue uses Proxies (in Vue 3) to track changes to data properties. When count changes, the UI updates automatically. The @click binds the button to the increment method.

My Tip: I once rambled about reactivity for too long in an interview. Practice explaining it in 30 seconds—clear and concise wins.

Resource: Gururo’s Vue.js practice tests have great reactivity questions to drill this down.

2. Why Isn’t My Component Rendering?

Question: This component doesn’t show up. Fix it:

				
					
  <div>{{ text }}</div>


export default {
  data: { text: 'Hi Vue!' }
};

Why It’s Asked: Debugging is a daily dev task, and interviewers love testing it.

Common Issues:

data isn’t a function (it should be)
Missing v-if or wrong template syntax
Component not registered

Fixed Code:

				
					
  <div>{{ text }}</div>


export default {
  data() {
    return { text: 'Hi Vue!' };
  }
};

What’s Going On: data needs to be a function to keep each component instance reactive. The original code broke that rule.

My Tip: I keep Vue DevTools open when practicing—it’s like X-ray vision for debugging. Mention it in interviews to sound pro.

3. Can You Build a Reusable Component?

Question: Make a Button component that takes a label prop and emits a click event.

Why It’s Asked: Shows you can write modular, reusable code.

Sample Solution:

				
					<!-- Button.vue -->

  <button>{{ label }}</button>


export default {
  props: {
    label: { type: String, required: true }
  }
};

<!-- Parent Component -->

  <Button />


import Button from './Button.vue';
export default {
  components: { Button },
  methods: {
    onClick() {
      alert('Clicked!');
    }
  }
};

What’s Going On: Props make the button flexible, and $emit lets the parent handle clicks.

My Tip: I flubbed a prop validation question once. Always add type and required to show you’re thorough.

4. How Do You Use Vuex for State Management?

Question: Explain Vuex’s key parts and create a store for a shopping cart.

Why It’s Asked: Vuex is a big deal in complex Vue apps.

Key Parts:

State: Your app’s data
Mutations: Update state synchronously
Actions: Handle async logic
Getters: Compute derived state

Sample Store:

				
					import { createStore } from 'vuex';
export default createStore({
  state: { cart: [] },
  mutations: {
    addItem(state, item) {
      state.cart.push(item);
    }
  },
  actions: {
    addItem({ commit }, item) {
      commit('addItem', item);
    }
  },
  getters: {
    cartItems: state =&gt; state.cart
  }
});

What’s Going On: Actions trigger mutations to update the cart, keeping state changes predictable.

My Tip: I got tripped up by async actions early on. Practice the action-mutation flow to nail it.

Resource: Gururo’s Vuex questions in their Vue.js practice tests are awesome for this.

5. How Do You Speed Up a Slow Component?

Question: Optimize this component for faster rendering:

				
					
  <div>
    
  </div>


export default {
  data() {
    return { items: /* huge array */ };
  }
};

Why It’s Asked: Performance matters in real apps.

Optimized Code:

				
					
  <div>
    
  </div>


import { defineAsyncComponent } from 'vue';
export default {
  components: {
    BigComponent: defineAsyncComponent(() =&gt; import('./BigComponent.vue'))
  },
  data() {
    return { items: /* huge array */ };
  }
};

What’s Going On: Lazy loading with defineAsyncComponent delays loading, and a custom v-lazy directive can defer rendering.

My Tip: I impressed an interviewer by mentioning Webpack’s code splitting. Study it for extra cred.

6. How Do You Set Up Routing?

Question: Create a Vue Router setup for Home and Profile pages.

Why It’s Asked: SPAs rely on routing, and interviewers test navigation skills.

Sample Solution:

				
					import { createRouter, createWebHistory } from 'vue-router';
import Home from './components/Home.vue';
import Profile from './components/Profile.vue';
const routes = [
  { path: '/', component: Home },
  { path: '/profile', component: Profile }
];
const router = createRouter({
  history: createWebHistory(),
  routes
});
export default router;

What’s Going On: Vue Router maps URLs to components, with createWebHistory for clean links.

My Tip: I practiced router guards like beforeEach for auth questions—it’s a common follow-up.

7. How Do You Fetch API Data?

Question: Build a component that loads and shows API data.

Why It’s Asked: Async data fetching is a daily task.

Sample Solution:

				
					
  <div>
    <p>Loading...</p>
    <ul>
      <li>{{ user.name }}</li>
    </ul>
  </div>


export default {
  data() {
    return { users: [], loading: true };
  },
  async mounted() {
    try {
      const response = await fetch('https://jsonplaceholder.typicode.com/users');
      this.users = await response.json();
      this.loading = false;
    } catch (error) {
      console.error('Fetch error:', error);
    }
  }
};

What’s Going On: mounted fetches data, and loading controls the UI state.

My Tip: I always add error handling—it shows you think about edge cases.

8. Can You Write a Custom Directive?

Question: Create a directive to highlight an element on hover.

Why It’s Asked: Tests your ability to extend Vue.

Sample Solution:

				
					
  <div>Hover me!</div>


export default {
  directives: {
    highlight: {
      mounted(el) {
        el.addEventListener('mouseenter', () =&gt; {
          el.style.backgroundColor = 'yellow';
        });
        el.addEventListener('mouseleave', () =&gt; {
          el.style.backgroundColor = '';
        });
      }
    }
  }
};

What’s Going On: The v-highlight directive adds hover effects using event listeners.

My Tip: I practiced v-if and v-for to prep for directive questions—they’re related.

9. How Do You Test Components?

Question: Write a unit test for a component using Vue Test Utils.

Why It’s Asked: Testing is a pro-level skill.

Sample Test:

				
					import { shallowMount } from '@vue/test-utils';
import MyComponent from './MyComponent.vue';
describe('MyComponent', () =&gt; {
  it('shows a greeting', () =&gt; {
    const wrapper = shallowMount(MyComponent, {
      props: { greeting: 'Yo!' }
    });
    expect(wrapper.text()).toContain('Yo!');
  });
});

What’s Going On: Vue Test Utils mounts the component and checks its output.

My Tip: I name-dropped Jest in an interview, and it sparked a great convo. Know your testing tools.

10. How Do You Handle Forms?

Question: Make a form with v-model for two-way binding.

Why It’s Asked: Forms are everywhere, and v-model is Vue’s magic sauce.

Sample Solution:

				
					
  
    
    <p>Email: {{ email }}</p>
  


export default {
  data() {
    return { email: '' };
  }
};

What’s Going On: v-model keeps the input and email in sync.

My Tip: I add basic validation (like checking email format) to stand out.

Making These Questions Work for You

Practice is everything. Here’s how I prep:

Fake the Interview: Set a 10-minute timer per question to build speed.
Talk It Out: Explain your code to an imaginary friend—it clarifies your thoughts.
Build Stuff: Code a small app (like a blog) to use what you learn.
Learn from Flubs: I bombed a Vuex question once—studying mutations fixed it.
Try Resources: Gururo’s Vue.js practice tests are my go-to for structured practice.

My Story: My buddy Sam practiced these questions for a month. In his interview, he aced a lifecycle hook question and landed a gig at a startup. Prep works!

Dodging Interview Traps

I’ve made my share of mistakes, so let me save you some pain:

Lifecycle Hook Mix-Ups: Tests love asking about created vs. mounted. I keep Vue’s lifecycle diagram bookmarked.
Skipping Optimization: Lazy loading and code splitting pop up a lot. Study Webpack and async components.
Debugging Woes: Broken code snippets are common. Vue DevTools is my lifesaver for tracing issues.

Fun Tidbit: Vue.js was born when Evan You, a former Google dev, wanted a lighter alternative to Angular. Now it’s a global hit!

Extra Resources to Keep Learning

Books:

Vue.js: Up and Running by Callum Macrae—perfect for newbies.
Learning Vue.js 2 by Olga Filipova for deeper dives.

Tools:

Vue DevTools for debugging like a pro.
Vite for fast Vue.js projects.

Websites:

Vue.js Docs (vuejs.org) for the real deal.
Gururo.com for Best Vue.Js Practice Tests.

Communities:

Vue.js Developers on Facebook.
r/vuejs on Reddit for coder chats.

Wrapping It Up

Acing a Vue.js interview is all about practice, not magic. These best Vue.js practice questions—from building components to mastering Vuex—give you the tools to walk in confident and walk out victorious. Work through them, code some projects, and practice explaining your solutions. You’ve got this.

Ready to crush it? Grab one question, code it up, and share it with a friend. As one wise coder said, “Good code is written one debug at a time.” Keep coding, and you’ll be a Vue.js star. Drop a comment with your fave question or tweet me your progress—I’m rooting for you!

Nail your Vue.js interview with Gururo’s Vue.js practice questions—expert-crafted challenges and clear solutions to boost your Vue.js interview skills!