Axios in Vue 3

What command is used to install Axios in a Vue 3 project?

• npm install axiosjs

• yarn add axios

• npm get axios

• npm install axios

Answer explanation

The correct command to install Axios in a Vue 3 project is 'npm install axios'. This command uses npm, the package manager for Node.js, to add the Axios library to your project, enabling you to make HTTP requests.

What is the purpose of the catch block in Axios error handling?

• To format the response data before it is returned.

• To retry failed HTTP requests automatically.

• To handle errors that occur during an HTTP request.

• To log successful HTTP requests.

Answer explanation

The catch block in Axios error handling is specifically designed to handle errors that occur during an HTTP request, allowing developers to manage and respond to these errors appropriately.

How can you use async/await with Axios to make a GET request?

• const fetchData = async () => { try { const response = await axios.get('URL'); console.log(response.data); } catch (error) { console.error(error); } };

• const fetchData = async () => { const response = await axios.post('URL'); };

• const response = axios.get('URL');

• const fetchData = () => { axios.get('URL').then(response => console.log(response.data)); };

Answer explanation

The correct choice uses async/await with Axios to make a GET request. It handles the response and errors properly within a try/catch block, ensuring that the data is logged if the request is successful.

What is the correct way to display data fetched from an API in a Vue component?

• Fetch data in the `mounted` hook, store it in a data property, and bind it in the template.

• Store data in a computed property and display it directly.

• Fetch data in the `created` hook and log it to the console.

• Use the `beforeMount` hook to fetch data and bind it immediately.

Answer explanation

The correct approach is to fetch data in the `mounted` hook, as this ensures the component is fully loaded. Storing the data in a data property allows for easy binding in the template, making it reactive and displayed correctly.

What is the default response type returned by Axios?

• HTML

• XML

• Text

• JSON

Answer explanation

Axios defaults to returning responses in JSON format, making it easy to work with JavaScript objects. Therefore, the correct answer is JSON.

How can you access the data from an Axios response?

• Retrieve data with response.content instead of response.data.

• Access data using response.getData() method.

• Use response.data to access the data from an Axios response.

• Use response.body to access the data from an Axios response.

Answer explanation

The correct way to access data from an Axios response is by using response.data. This property contains the response body, making it the standard method for retrieving data in Axios.

What should you do if an Axios request fails due to a network error?

• Ignore the error and continue with the request.

• Retry the request without any error handling.

• Log the error and do nothing about it.

• Handle the error in a catch block and take appropriate action.

Answer explanation

When an Axios request fails due to a network error, it's essential to handle the error in a catch block. This allows you to take appropriate action, such as retrying the request or notifying the user, rather than ignoring the issue.

What is the difference between Axios and the Fetch API?

• Axios offers a simpler API and additional features compared to the Fetch API.

• Axios is only for Node.js, while Fetch API is for browsers.

• Axios requires a callback for every request, unlike Fetch API.

• Fetch API supports automatic JSON parsing, while Axios does not.

Answer explanation

Axios simplifies HTTP requests with a more user-friendly API and additional features like interceptors and automatic JSON transformation, making it easier to use compared to the Fetch API.

What method is used to send data in a POST request using Axios?

• axios.put('https://api.example.com/data', data)

• axios.request('https://api.example.com/data', { method: 'POST', data })

• axios.post('https://api.example.com/data', data)

• axios.send('https://api.example.com/data', data)

Answer explanation

The correct method to send data in a POST request using Axios is axios.post('https://api.example.com/data', data). This method is specifically designed for POST requests, making it the appropriate choice.

What is the correct way to handle a response error in Axios?

• Log the error and throw it again.

• Use the `then` method to handle errors.

• Use the `catch` method to handle errors.

• Ignore the error and proceed with the next request.