Cloud storage integration concept in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Express framework.

Express

const express = require('[1]');

Drag options to blanks, or click blank then click option'

Apath

Bhttp

Cexpress

Dfs

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'http' instead of 'express' to import the framework.

Forgetting to use quotes around the module name.

The Express framework is imported using require('express').

2fill in blank

medium

Complete the code to initialize the Express app.

Express

const app = [1]();

Drag options to blanks, or click blank then click option'

Aexpress

Brequire

Chttp

Drouter

Attempts:

3 left

💡 Hint

Common Mistakes

Calling http() instead of express().

Using require() without arguments.

To create an Express app, call express().

3fill in blank

hard

Fix the error in the code to upload a file to AWS S3 using the AWS SDK.

Express

const AWS = require('aws-sdk');
const fs = require('fs');
const s3 = new AWS.S3();

const params = {
  Bucket: 'my-bucket',
  Key: 'file.txt',
  Body: [1]
};

s3.upload(params, (err, data) => {
  if (err) console.log(err);
  else console.log('Upload success:', data.Location);
});

Drag options to blanks, or click blank then click option'

A'file.txt'

Bfs.createReadStream('file.txt')

Cfs.readFileSync('file.txt')

DBuffer.from('file.txt')

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the file name string instead of file content.

Using readFileSync which reads the whole file into memory.

To upload a file stream to S3, use fs.createReadStream('file.txt') as the Body.

4fill in blank

hard

Fill both blanks to configure Express to parse JSON and handle file uploads with multer.

Express

const express = require('express');
const multer = require('multer');
const upload = multer({ dest: '[1]' });

const app = express();
app.use(express.[2]());

Drag options to blanks, or click blank then click option'

Auploads/

Bjson

Curlencoded

Dpublic/

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'public/' instead of 'uploads/' for multer destination.

Using 'urlencoded' instead of 'json' for JSON parsing.

Set multer's destination folder to 'uploads/' and use express.json() middleware to parse JSON bodies.

5fill in blank

hard

Fill all three blanks to create an Express POST route that uploads a single file named 'photo' and sends a success message.

Express

app.post('/upload', upload.[1]('[2]'), (req, res) => {
  if (!req.file) {
    return res.status(400).send('[3]');
  }
  res.send('File uploaded successfully');
});

Drag options to blanks, or click blank then click option'

Asingle

Barray

Cphoto

DNo file uploaded

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'array' instead of 'single' for one file upload.

Checking wrong request property for the file.

Sending a generic error message instead of 'No file uploaded'.

Use upload.single('photo') to handle one file named 'photo'. Send 'No file uploaded' if missing.