NOTES + PRACTICE QUESTIONS ABOUT WEB SECTION
WEB- & DATABASE TECHNOLOGY CSE1500
CSE TU Delft - Lieke Sanders
→ From Claudia’s website + practice exams
HTTP
HTML
JavaScript
Node.js 1
CSS
Node.js 2
Sessions et al
,HTTP
1 True or False?
The client's credentials need to be sent in every single HTTP request to a server requiring
basic authentication.
True
2 What does long polling refer to in the context of HTTP?
Long polling emulates a push mechanism that is missing in HTTP/1.1: the client
sends an HTTP request; the server holds the request open until new data is available
before sending its HTTP response. Once the response is sent, the client immediately
sends another HTTP request that is kept open.
3 True or False?
In HTTP/1.1 the client always initiates the conversation with the server.
True
4 True or False?
HTTP/1.1 supports bidirectional communication between client and server.
False
5 True or False?
A PUT method request can lead to the creation of a new resource on the server.
True
6 True or False?
PUT sends data from server to client; the client determines how to handle the data.
False
, 7 Consider the following HTTP header. Is it a response or request header? And is it valid?
It’s a valid HTTP request header.
8 Which of the following statements about HTTP/1.1 is TRUE?
x HTTP/1.1 is a binary protocol.
x HTTP/1.1 does not allow the reuse of the same open connection for several
request-response cycles.
x HTTP/1.1 supports bidirectional communication between client and server.
✓ In HTTP/1.1 the client always initiates the conversation with the server
9 What does the header field Cache-Control:max-age=100 mean if it is sent in an HTTP
response? You can assume that the HTTP response was sent today.
The web cache through which the HTTP response passes, caches the resource sent
in the HTTP response. If an HTTP request for the cached resource arrives at the
cache more than two minutes after the response was cached, the web cache will
revalidate the resource by querying the origin server.
WEB- & DATABASE TECHNOLOGY CSE1500
CSE TU Delft - Lieke Sanders
→ From Claudia’s website + practice exams
HTTP
HTML
JavaScript
Node.js 1
CSS
Node.js 2
Sessions et al
,HTTP
1 True or False?
The client's credentials need to be sent in every single HTTP request to a server requiring
basic authentication.
True
2 What does long polling refer to in the context of HTTP?
Long polling emulates a push mechanism that is missing in HTTP/1.1: the client
sends an HTTP request; the server holds the request open until new data is available
before sending its HTTP response. Once the response is sent, the client immediately
sends another HTTP request that is kept open.
3 True or False?
In HTTP/1.1 the client always initiates the conversation with the server.
True
4 True or False?
HTTP/1.1 supports bidirectional communication between client and server.
False
5 True or False?
A PUT method request can lead to the creation of a new resource on the server.
True
6 True or False?
PUT sends data from server to client; the client determines how to handle the data.
False
, 7 Consider the following HTTP header. Is it a response or request header? And is it valid?
It’s a valid HTTP request header.
8 Which of the following statements about HTTP/1.1 is TRUE?
x HTTP/1.1 is a binary protocol.
x HTTP/1.1 does not allow the reuse of the same open connection for several
request-response cycles.
x HTTP/1.1 supports bidirectional communication between client and server.
✓ In HTTP/1.1 the client always initiates the conversation with the server
9 What does the header field Cache-Control:max-age=100 mean if it is sent in an HTTP
response? You can assume that the HTTP response was sent today.
The web cache through which the HTTP response passes, caches the resource sent
in the HTTP response. If an HTTP request for the cached resource arrives at the
cache more than two minutes after the response was cached, the web cache will
revalidate the resource by querying the origin server.
