12 Caching & Headers questions from the REST API bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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A.a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged
B.a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests
C.the header declaring the media format of the message body, such as application/json
D.the header that directs caching behavior with directives like max-age, no-store, private, and public
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2. Which term means: "a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests"?
Mid
A.Content-Type
B.Cache-Control
C.If-None-Match
D.ETag
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3. Which statement is correct?
Mid
A.ETag — a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests
B.ETag — the header that directs caching behavior with directives like max-age, no-store, private, and public
C.ETag — the header declaring the media format of the message body, such as application/json
D.ETag — a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged
Answer + AI explanation with Pro
4. What is Cache-Control?
Mid
A.the header that directs caching behavior with directives like max-age, no-store, private, and public
B.the header declaring the media format of the message body, such as application/json
C.a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests
D.a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged
Answer + AI explanation with Pro
5. Which term means: "the header that directs caching behavior with directives like max-age, no-store, private, and public"?
Mid
A.If-None-Match
B.ETag
C.Cache-Control
D.Content-Type
Answer + AI explanation with Pro
6. Which statement is correct?
Mid
A.Cache-Control — the header that directs caching behavior with directives like max-age, no-store, private, and public
B.Cache-Control — a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged
C.Cache-Control — the header declaring the media format of the message body, such as application/json
D.Cache-Control — a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests
Answer + AI explanation with Pro
7. What is If-None-Match?
Senior
A.the header declaring the media format of the message body, such as application/json
B.the header that directs caching behavior with directives like max-age, no-store, private, and public
C.a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests
D.a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged
Answer + AI explanation with Pro
8. Which term means: "a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged"?
Senior
A.ETag
B.Cache-Control
C.If-None-Match
D.Content-Type
Answer + AI explanation with Pro
9. Which statement is correct?
Senior
A.If-None-Match — a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged
B.If-None-Match — the header declaring the media format of the message body, such as application/json
C.If-None-Match — the header that directs caching behavior with directives like max-age, no-store, private, and public
D.If-None-Match — a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests
Answer + AI explanation with Pro
10. What is Content-Type?
Junior
A.the header that directs caching behavior with directives like max-age, no-store, private, and public
B.a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged
C.the header declaring the media format of the message body, such as application/json
D.a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests
Answer + AI explanation with Pro
11. Which term means: "the header declaring the media format of the message body, such as application/json"?
Junior
A.If-None-Match
B.Content-Type
C.Cache-Control
D.ETag
Answer + AI explanation with Pro
12. Which statement is correct?
Junior
A.Content-Type — the header that directs caching behavior with directives like max-age, no-store, private, and public
B.Content-Type — the header declaring the media format of the message body, such as application/json
C.Content-Type — a response header carrying an opaque version identifier for a resource, used to validate cached copies via conditional requests
D.Content-Type — a conditional request header that sends a previously received validator so the server can answer not-modified when unchanged
Answer + AI explanation with Pro
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