Question 1

What is the risk of allowing unsanitized user input in a web application?

Options :

A : Increased performance

B : Injection attacks such as SQL Injection and XSS

C : Better user experience

D : Improved scalability

Answer: B

Question 2

Which HTTP status code is suitable for logging and displaying a 'Not Found' message?

Options :

A : 200

B : 404

C : 500

D : 400

Answer: B

Question 3

How does custom middleware validate incoming requests in Express.js?

Options :

A : By intercepting requests in the middleware chain

B : By bypassing validation for known users

C : By directly modifying the database

D : By rejecting all POST requests

Answer: A

Question 4

What is validator.js commonly used for in web applications?

Options :

A : Database migrations

B : Input validation

C : File uploads

D : Authentication

Answer: B

Question 5

Which type of attack is most commonly mitigated by input sanitization?

Options :

A : SQL Injection

B : Cross-Site Scripting (XSS)

C : Man-in-the-Middle (MITM)

D : Distributed Denial of Service (DDoS)

Answer: B

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