HTTP (Method, Status Codes, and Headers)

Question 1

These are used by HTTP request messages in the request line. It indicates the desired action for the specified resource.

Answer 1

Method

Question 2

Methods are sometime called as?

Answer 2

HTTP Verbs

Question 3

This method is used to request a specific resource from the server. These request are meant to be read only, and not modify the server’s state.

Answer 3

Get Method

Question 4

This method is used to submit data to a server.

It serves four function:

1. Annotation of existing resources
2. Posting a message to a bulletin board, newsgroup, mailing list, etc
3. Providing a block of data, such as the result of submitting a form, to a data-handling process.
4. Extending a database through an append operation

Unlike GET, it often results in some state change in the server.

Answer 4

POST

Question 5

The expected response of this method is identical to a response to a Get request with the same path, headers, etc. but without the response body. It is used for checking link validity, recent modification, or just to find out more about the resource without actually fetching it.

Answer 5

HEAD

Question 6

This method replaces a current resource in the specified path with the data in the request body.

Answer 6

PUT

Question 7

This method deletes the resource in the specified path.

Answer 7

DELETE

Question 8

This method is used by the client to establish a connection to the server over a tunnel proxy

Answer 8

CONNECT

Question 9

This method is used to echo the contents of an HTTP Request back to the client. It is generally for debugging.

Answer 9

TRACE

Question 10

This method is used to ask the server about its supported methods. It can be used to ask what methods are supported by the server in total.

Answer 10

OPTIONS

Question 11

This method is used to apply partial modification to the data in the specified url

Answer 11

PATCH

Question 12

One characteristic of an HTTP method is through? These do not alter the state of the server. (read only operation)

Answer 12

Safe Methods

Question 13

One characteristic of an HTTP method is through? These method exhibit Idempotency

Answer 13

Idempotent Methods

Question 14

This property of certain operations such that they can be applied several times without changing the result of the initial application.

Answer 14

Idempotency

Question 15

True or False? All safe methods are no idempotents since they change the server’s state

Answer 15

False

Question 16

In this method, only head and get are cacheable. If the method used in the request is cacheable, then the response is considered cacheable.

Answer 16

Cacheable Methods.

Question 17

200 OK

MEANING IN GET, HEAD, AND DELETE?

Answer 17

GET: The resource was fetched and is in the response body.

HEAD: The entity headers are in the response

DELETE: The resource at the specified URL was deleted.

Question 18

201 Created

What is the meaning?

Answer 18

The request was a success and a new resource was treated as a result (e.g. in response to PUT)

Question 19

What range in status code indicate neither failure nor success. It indicates that further action needs to be taken by the client in order for the request to be processed. A common cause is the need for clients to use alternate locations for their requested resource

Answer 19

300 Range

Question 20

What does 300 Multiple Choices mean?

Answer 20

The URL requested refers to multiple resources. This code is returned with a list of options the client can select from.

Question 21

301 moved permanently means?

Answer 21

The resource has been moved to a different URL. The new URL is indicated by the location header in the response.

Question 22

302 found means?

Answer 22

It is like 301, but the move is temporary. Browsers redirect to the temporary URL but crawlers don’t update their databases

Question 23

304 Not modified means?

Answer 23

The resources hasn’t been modified so there’s no need to transmit the data. refer to a cached copy instead

Question 24

what usually causes 400 range?

Answer 24

Caused by badly formed requests or nonexistent URLs.

Question 25

When the syntax is invalid what is returned?

Answer 25

400 Bad Request

Question 26

When the request was not acted upon becuase it lacks valid authentication credential it send what status code?

Answer 26

401 Unauthorized

Question 27

When the server understood the request but will not authorize it, what status code will be sent?

Answer 27

403 Forbidden

Question 28

When there is no resource found in the specified URL what status code is given?

Answer 28

404 Not found

Question 29

When the method used in the request isn't supported for the specified resource, what status code is given?

Answer 29

405 Method not allowed

Question 30

When the access to the target resource is no longer available, what status code is given?

Answer 30

410 Gone

Question 31

When the client sent an entity body larger than the server can or wants to process, what status code is given?

Answer 31

413 Request Entity Too Large

Question 32

When the client sent a request with a URL longer than the server can or wants to process, what status code is given?

Answer 32

414 Request URI Too Long

Question 33

When the content type of the request payload is not supported by the server, what status code is given?

Answer 33

415 Unsupported Media Type

Question 34

What is the common cases for 500 range status code to show?

Answer 34

Server limitations, error in server components, proxy errors.

Question 35

When the server encountered an error but can't give a more specific status code, what status code is given? It is a generic server error message.

Answer 35

500 Internal Error

Question 36

When the server does not support the functionality to fulfill the request. Use Case: the server doesn't recognize the request method at all.

Answer 36

501 Not Implemented

Question 37

When the server isn't ready to handle the request. It is commonly caused by server overload or server maintenance. Used for temporary conditions

Answer 37

503 Service Unavailable

Question 38

What can the server use to indicate how much time the client should wait before trying again in 503 service unavailable?

Answer 38

Retry After header

Question 39

When the server, acting as a proxy, couldn't get a response in time from the next entity, what status code is shown?

Answer 39

504 Gateway Timeout

Question 40

When the server doesn't support the HTTP version used in the request message, what status code is given?

Answer 40

505 HTTP Version Not Supported.

Question 41

In a 101 switching protocol, when the server is switching to the protocol requested by the client, it is specified by what header?

Answer 41

Upgrade

Question 42

When the client should continue with the request or ignore the response if it's already finished, what status code should be given?

Answer 42

100 Continue

Question 43

This allow the client and server to pass additional information in request and response message. It work with methods to determine what clients and servers do. It also gives additional context to status codes.

Answer 43

Header

Question 44

Who uses HTTP headers?

Answer 44

request and response messages

Question 45

This type of header can be used for both request and response messages. They contain general information that does not apply to the contents of the message body.

Answer 45

General Header

Question 46

This type of header are only used in request messages. They also don't relay to contents of the request message body. They may contain the resource requested, or the client itself

Answer 46

Request Header

Question 47

Here, clients requests a new copy of the resource if it has been modified since the specified date. If the resources hasn't been modified, client receives 304 and uses a cached copy instead.

Answer 47

If-modified-Since

Question 48

This type of header us used to give more detailed information about the response. They don't relate to the message body content either.

Answer 48

Respond Header

Question 49

This refers how much time (in seconds) the response has been in a proxy cache

Answer 49

Age

Question 50

This indicates the redirection URL. It is used in conjunction with 300 range codes.

Answer 50

Location

Question 51

This type of header can be used by both request and response messages. They describe the content of the message body

Answer 51

Entity Header

Question 52

The value of the Content-Type header indicates what of the payload content?

Answer 52

MIME Type

Question 53

The multipurpose internet mail extension or Mime helps in?

Answer 53

the receiving entity decide what to do with the data.

Question 54

In the MIME type, what is for design/layout?

Answer 54

text/css

Question 55

in the mime type, what is for rendering the doc as HTML

Answer 55

text/html

Question 56

in the mime type what is used to open a download prompt?

Answer 56

application/zip

Question 57

in the mime type what are used to display as a document?

Answer 57

application/powerpoint application/pdf

Question 58

Is HTTP meant to be extensible?

Answer 58

Yes