What is the purpose of the 'If-Modified-Since' HTTP header? MCQ with Answer and Explanation

What is the purpose of the 'If-Modified-Since' HTTP header?
A. To set the last modified time
B. To specify cache expiration
C. To check for updates
D. To request a conditional GET if the resource has been modified since the date
Answer: Option D
Solution (By JKSSB Mock Tests)
If-Modified-Since allows the client to request the resource only if it has been modified since the specified date, saving bandwidth.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Internet and Web Technologies Questions

Question #1
What is the primary function of an ISP in computer networks?
A. To provide internet connectivity to end users
B. To translate source domain codes
C. To manage local browser history caches
D. To store corporate user database systems

Correct Answer: Option A


Explanation:
An ISP (Internet Service Provider) is a commercial or institutional company that provides infrastructure and services to access and use the internet.

This question belongs to: Computer Internet and Web Technologies
Question #2
What is the function of an IP address?
A. To encrypt data
B. To translate domain names
C. To store web pages
D. To identify a device on a network

Correct Answer: Option D


Explanation:
An IP address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.

This question belongs to: Computer Internet and Web Technologies
Question #3
In a URL scheme like '[https://www.example.com:8080/index.html](https://www.google.com/search?q=https://www.example.com:8080/index.html)', what does the component '8080' specifically represent?
A. The directory path length
B. The encryption key length
C. The sub-domain identifier
D. The network port number

Correct Answer: Option D


Explanation:
The number after the colon following the host or domain name represents the specific port number over which the network service is being accessed.

This question belongs to: Computer Internet and Web Technologies