Express.js File Uploads with Multer MCQ | Express.js Multer Multiple Choice Questions

Direction: Choose the correct option

What is Multer?

A. A database driver

B. An image processing library

C. A middleware for handling multipart/form-data (file uploads)

D. A middleware for parsing JSON

Direction: Choose the correct option

How do you configure Multer to store uploaded files on disk?

A. multer.diskStorage({ destination: ... })

B. const upload = multer({ dest: 'uploads/' })

C. Both A and B

D. const upload = multer().disk('uploads/')

Direction: Choose the correct option

How do you handle a single file upload with field name 'avatar'?

A. upload.any()

B. upload.single('avatar')

C. upload.array('avatar')

D. upload.fields([{ name: 'avatar' }])

Direction: Choose the correct option

Where can you access information about the uploaded file (like filename) in the route handler?

A. req.files

B. req.file

C. req.params.file

D. req.body.file

Direction: Choose the correct option

What is a common security concern with file uploads?

A. File naming conflicts

B. Allowing malicious files (like scripts) to be uploaded and executed

C. Slow upload speed

D. File size too large

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