Question 1

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 2

What format is most commonly used for structured error responses in REST APIs?

Options :

A : JSON

B : XML

C : YAML

D : Plain Text

Answer: A

Question 3

Which of the following methods can help prevent SSRF attacks?

Options :

A : Using input validation to restrict URLs.

B : Allowing unrestricted IP ranges for server requests.

C : Disabling firewall protections.

D : Using encrypted HTTP (HTTPS).

Answer: A

Question 4

What does 'Promise.race()' return?

Options :

A : The result of the first settled promise

B : The results of all settled promises

C : The fastest resolved promise only

D : An error if any promise fails

Answer: A

Question 5

What does the '.catch()' method do in a promise chain?

Options :

A : Handles rejected promises

B : Handles resolved promises

C : Runs after all promises are settled

D : Creates a new promise

Answer: A