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

Question
What is the purpose of the 'If-Modified-Since' HTTP header?
A. To set the last modified time
B. To request a conditional GET if the resource has been modified since the date
C. To check for updates
D. To specify cache expiration
Answer: Option B
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.
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What does the term 'SEO' stand for?
A. Search Engine Optimization
B. Simple Engine Optimization
C. Search Evaluation Operation
D. Site Engine Optimization
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Correct Answer: Option A

Explanation:
SEO stands for Search Engine Optimization, the practice of improving a website's visibility in search engine results.
This question belongs to: Computer Internet and Web Technologies
Question #2
Which of the following ports is the standard default port for unencrypted POP3 email retrieval?
A. 25
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C. 143
D. 995
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Correct Answer: Option B

Explanation:
Port 110 is the traditional network port allocated for unencrypted Post Office Protocol version 3 (POP3) traffic.
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What does the term 'web 2.0' refer to?
A. The second version of the HTTP protocol
B. A new type of web browser
C. An encryption standard
D. A term for websites that emphasize user-generated content and interactivity
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Correct Answer: Option D

Explanation:
Web 2.0 refers to the second generation of the web, characterized by user-generated content, social media, and enhanced interactivity, as opposed to static pages.
This question belongs to: Computer Internet and Web Technologies
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