Rest API Quiz, Rest API MCQ (Multiple Choice Questions)

1 .

Which year was the dissertation that described how to build RESTful APIs delivered?

A)

1996

B)

1998

C)

2000

D)

2003

Correct Answer : 2000

Explanation : It's hard to believe, but Roy Fielding delivered his dissertation on REST in 2000, predating the SOA craze, microservices and cloud-native computing. But more than 20 years later, the RESTful architectural style remains prominent in the world of software development.

2 .

What does the Acronym REST Stand for?

A)

Represent State Transfer

B)

Representational State Transfer

C)

Represent State Transform

D)

Representational State Transform

Correct Answer : Representational State Transfer

3 .

Who is credited with the invention of REST?

A)

James Gosling

B)

Linus Torvalds

C)

Roy Fielding

D)

Kohsuke Kawaguchi

Correct Answer : Roy Fielding

Explanation : The term REST was originally defined in Roy Fielding's doctoral dissertation, "Architectural Styles and the Design of Network-based Software Architectures." Kohsuke Kawaguchi created Jenkins. James Gosling invented Java. Linus Torvalds devised Linux and Git.

4 .

Which of the following component of HTTP request contains metadata for the HTTP Request message as key-value pairs?

A)

URI

B)

VERB

C)

HTTP Version

D)

Request Header

Correct Answer : Request Header

Explanation : Request Header − Contains metadata for the HTTP Request message as key-value pairs. For example, client ( or browser) type, format supported by client, format of message body, cache settings etc.

5 .

Which of the following is correct about URI in RESTful web services?

A)

Each resource in REST architecture is identified by its URI.

B)

Purpose of an URI is to locate a resource(s) on the server hosting the web service.

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Both (A) and (B)

Explanation : Each resource in REST architecture is identified by its URI. Purpose of an URI is to locate a resource(s) on the server hosting the web service.

6 .

What protocol does REST follow?

A)

HTTP

B)

FTP

C)

SFTP

D)

FTPS

Correct Answer : HTTP

7 .

HTTP Code 200 represents which among the following?

A)

Success

B)

Failure

C)

Warning

D)

Completed

Correct Answer : Success

8 .

Your API resource does no allow deletion, and a client application attempted to delete the resource. What HTTP response code should you return?

A)

409 Conflict

B)

400 Bad Request

C)

406 Not Acceptable

D)

405 Method Not Allowed

Correct Answer : 405 Method Not Allowed

9 .

Which REST constraint specifies that knowledge and understanding obtained from one component of the API should be generally applicable elsewhere in the API?

A)

Stateless

B)

Uniform Interface

C)

Chacheable

D)

Client-Server

Correct Answer : Uniform Interface

10 .

Which is a common command-line tool for using or exploring an API?

A)

ssh

B)

bash

C)

curl

D)

powerShell

Correct Answer : curl

11 .

Which HTTP verb is normally used to update or create a resource in an API?

A)

WRITE

B)

POST

C)

CREATE

D)

SUBMIT

Correct Answer : POST

12 .

Which of the following options are true for REST Services?

A)

REST supports only JSON representation.

B)

Each resource can be identified by multiple URIs.

C)

In REST Services, the client gets access to resources and the server provides access to them.

D)

All of the above.

Correct Answer : In REST Services, the client gets access to resources and the server provides access to them.

13 .

What method should be used to obtain a list of supported operations in REST services?

A)

GET

B)

HEAD

C)

DELETE

D)

OPTION

Correct Answer : OPTION

14 .

The ability to execute the same API request over and over again without changing the resource's state is an example of _________.

A)

idempotency

B)

cacheability

C)

a uniform interface

D)

stateless architecture

Correct Answer : idempotency

15 .

What is OpenID Connect?

A)

a modern replacement for API keys

B)

the new name for SAML 3.0

C)

an SSO competitor for OAuth 2.0

D)

an identify layer on top of OAuth 2.0

Correct Answer : an identify layer on top of OAuth 2.0

16 .

Which of the following HTTP method should be used to delete resource using RESTful web service?

A)

GET

B)

DELETE

C)

POST

D)

OPTIONS

Correct Answer : DELETE

Explanation : DELETE opearations should be used to delete resource using RESTful web service.

17 .

Which of the following directive of Cache Control Header of HTTP response indicates that resource is not cachable?

A)

Public

B)

Private

C)

max-age

D)

no-cache/no-store

Correct Answer : no-cache/no-store

18 .

Which of the following HTTP Status code means NOT MODIFIED, used to reduce network bandwidth usage in case of conditional GET requests?

A)

200

B)

201

C)

304

D)

204

Correct Answer : 304

Explanation : HTTP Status Code 304 means NOT MODIFIED, used to reduce network bandwidth usage in case of conditional GET requests.

19 .

What must be enabled in order for a RESTful web service to receive invocations from different domains, subdomains or ports?

A)

CORS

B)

SSL

C)

Headers

D)

Cache control

Correct Answer : CORS

Explanation : By default, a RESTful web service will not allow requests from clients outside of the domain and port on which it is hosted. To allow this, cross-origin resource sharing, or CORS, must be enabled.

20 .

To create a new resource with a predefined resource URL, you should use which of the following HTTP methods?

A)

PUT

B)

POST

C)

OPTION

D)

CREATE

Correct Answer : PUT

Explanation : When the resource identifier is supplied as part of the URL, along with metadata to be used to create the object, the correct HTTP method to use is PUT.

21 .

The ability to invoke a RESTful method multiple times without changing the state of the server on subsequent invocations is known as:

A)

Uniformity

B)

Idempotence

C)

Immutability

D)

Statefulness

Correct Answer : Idempotence

22 .

Which option is not a RESTful API constraint?

A)

Code on demand

B)

The use of a client-server model

C)

Service orchestration

D)

A stateless request-response cycle

Correct Answer : Service orchestration

Explanation : Code on demand, the client-server model and a stateless request-response cycle are all RESTful constraints described in Roy Fielding's dissertation on RESTful web services. Service orchestration, which is most commonly associated with cloud-native Kubernetes clusters, is not a RESTful constraint.

23 .

RPIs commonly use webhooks to _________

A)

catch error faster

B)

log additional data

C)

improve error logging

D)

notify other systems of an event

Correct Answer : notify other systems of an event

24 .

What is one benefit of server-side caching in APIs?

A)

It improves uptime.

B)

Mobile app work better.

C)

It offers better security.

D)

It reduce load on servers.

Correct Answer : It reduce load on servers.

25 .

How would you configure a RESTful URL parameter that supports a search for a book based on its ID?

A)

GET /books/{id}

B)

GET /{id}/books/

C)

GET /book?id={id}

D)

GET /books?id={id}

Correct Answer : GET /books/{id}

Explanation : RESTful URLs preferably identify resources through URL parameters as opposed to query parameters. Furthermore, the name of the collection type should precede the unique identifier of the resource, which makes GET /books/{id}

26 .

What is the HTTP Status Code Related to Page Not Found?

A)

405

B)

404

C)

403

D)

402

Correct Answer : 404

27 .

What is the HTTP Code 200 Indicate?

A)

Error

B)

Warning

C)

Success

D)

Completed

Correct Answer : Success

28 .

What is the HTTP Code Related to Internal Server Error?

A)

401

B)

500

C)

501

D)

502

Correct Answer : 500

29 .

REST API services use for communication only HTTP protocol

A)

TRUE

B)

FALSE

C)

Can not say

D)

--

Correct Answer : FALSE

30 .

The side-effects of N > 0 identical requests are the same as for a single request. This is________

A)

APIance

B)

RESTFullness

C)

Equivalence

D)

Idempotency

Correct Answer : Idempotency

31 .

It is a good practice to write-long-resources-in-such-style

A)

Kebab case

B)

Studly caps

C)

Camel case

D)

Caesar cipher

Correct Answer : Kebab case

32 .

The insistence that RESTful APIs have URLs that identify resources in a consistent and predictable manner is known as:

A)

The RESTful naming convention

B)

The RESTful consistency constraint

C)

The uniform interface constraint

D)

The RESTful pattern matching convention

Correct Answer : The uniform interface constraint

Explanation : The uniform interface constraint demands that URLs and URIs be designed in a predictable and consistent manner that is easily navigated and consumed by RESTful clients.

33 .

Which of the below does the task of binding the parameters passed to the HTTP method to HTTP Header while using JAX RS API?

A)

@PathParam

B)

@QueryParam

C)

@PathVariable

D)

@HeaderParam

Correct Answer : @HeaderParam

34 .

What category does the 5xx HTTP code belong to?

A)

Warning

B)

Server Error

C)

Client Error

D)

Redirection

Correct Answer : Server Error

35 .

What is one benefit of GraphQl over REST approaches?

A)

more stable APIs

B)

more secure by default

C)

flexible querying/responses

D)

compatible with more gateways

Correct Answer : flexible querying/responses

36 .

Which URL pattern is recommended when working with one resource and a collection of resources?

A)

/companies/{id} and/companies

B)

/company/{id} and/company

C)

/companies/{id} and/company

D)

/company/{id} and/companies

Correct Answer : /companies/{id} and/companies

37 .

What is the underlying goal of all APIs?

A)

to move infrastructure to the cloud.

B)

to share features and functionality with other system.

C)

to appease the latest digital transformation effort.

D)

to add new technologies to an organization's infrastructure.

Correct Answer : to share features and functionality with other system.

38 .

If you were to add versioning by using the Accept and Content-Type header, what would be the correct format of the header value?

A)

text/html

B)

application/json

C)

application/json_version2

D)

application/vnd.myapp.v2+json

Correct Answer : application/vnd.myapp.v2+json

39 .

Is it possible to maintain sessions in REST on the server-side?

A)

No

B)

Yes

C)

Can not say

D)

Depends on situation

Correct Answer : No

40 .

Which among the below directives belonging to the Cache-Control header of HTTP response provide information to the server that the resources have to be revalidated if max-age has crossed?

A)

no-store

B)

no-cache

C)

must-revalidate

D)

None of the above

Correct Answer : must-revalidate

41 .

What is the true difference between TCP and UDP?

A)

TCP is stateless

B)

TCP is faster than UDP

C)

TCP supports broadcasting

D)

TCP guarantees delivery of data

Correct Answer : TCP guarantees delivery of data

42 .

This URI component can have be e.g. "http" or "mailto" ?

A)

path

B)

scheme

C)

protocol

D)

authority

Correct Answer : scheme

43 .

An IPv4 address consists of four__________

A)

bits

B)

octets

C)

hextets

D)

musketeers

Correct Answer : octets

44 .

Swagger specification is now called________

A)

OWASP

B)

Smartbear Specification

C)

OpenAPI Specification

D)

RESTful API Specification

Correct Answer : OpenAPI Specification

45 .

Which header should be configured to tell the server XML is preferred over JSON?

A)

GET

B)

Accept

C)

User-Agent

D)

Content-Type

Correct Answer : Accept

Explanation : The Accept header can be configured to tell the server how to format the exchanged data. The Content-Type header informs the client of the format of the data being delivered. The User-Agent property describes the browser type. GET is an HTTP method, not a standard HTTP header.

46 .

RFC2617 describes HTTP Basic A__________Scheme with an API Key as either the username or the password.

A)

Authentication

B)

Authorization

C)

Can not say

D)

--

Correct Answer : Authentication

47 .

Which of the following best describes REST?

A)

REST is a web service standard

B)

REST is a cloud-native API framework

C)

REST is a microservices-based protocol

D)

REST is an architectural style

Correct Answer : REST is an architectural style

Explanation : REST predates the common use of terms such as cloud-native and microservices by almost 20 years. It is certainly used for web services, but it is not actually a standard. Instead, REST is considered an architectural style.

48 .

Which of the following is correct about web services?

A)

A web service is a collection of open protocols and standards used for exchanging data between applications or systems.

B)

Software applications written in various programming languages and running on various platforms can use web services to exchange data among them over computer networks like the Internet.

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Both (A) and (B)

Explanation : A web service is a collection of open protocols and standards used for exchanging data between applications or systems. Software applications written in various programming languages and running on various platforms can use web services to exchange data over computer networks like the Internet in a manner similar to inter-process communication on a single computer.

49 .

What purpose does a User-Agent serve?

A)

It identifies the client application or SDK.

B)

It identifies the user ID.

C)

It identifies if the API should accept microservice traffic.

D)

It identifies if the API should expect a user authentication.

Correct Answer : It identifies the client application or SDK.

50 .

When dealing with JSON web Tokens (JWTs), what is a claim?

A)

Ownership

B)

data in the token

C)

and integer

D)

a permission

Correct Answer : data in the token

51 .

What component can you use to wrap legacy architectures or protocols into a REST interface for easier consumption and integration?

A)

OpenAPI

B)

API proxy

C)

API gateway

D)

OAuth authorization server

Correct Answer : API proxy

52 .

What category do 1xx HTTP status codes belong to?

A)

Redirection

B)

Client Error

C)

Server Error

D)

Informational

Correct Answer : Informational

53 .

Which component of HTTP response has the metadata for stating the type of response message is in the form of key-value pairs?

A)

HTTP Version

B)

Status Code

C)

Response Header

D)

Response Body

Correct Answer : Response Header

54 .

What constraint is not a strict requirement for a service to be called a RESTful web service?

A)

Code on Demand

B)

Stateless

C)

Client-Server

D)

Uniform Interface

Correct Answer : Code on Demand

55 .

What is the modern specification for describing an API?

A)

WSDL

B)

WADL

C)

OAuth

D)

OpenAPI (Swagger)

Correct Answer : OpenAPI (Swagger)

56 .

Which of the following annotation of JAX RS API is used to annotate a method used to create/update resource?

A)

@PUT

B)

@POST

C)

@GET

D)

@Path

Correct Answer : @POST

Explanation : @POST − HTTP Get request, used to create/update resource.

57 .

Which of the following annotation of JAX RS API assigns a default value to a parameter passed to method?

A)

@Context

B)

@DefaultValue

C)

@FormParam

D)

@CookieParam

Correct Answer : @DefaultValue

Explanation : @DefaultValue − Assigns a default value to a parameter passed to method.

58 .

RESTful web services use HTTP methods to implement the concept of REST architecture.

A)

True

B)

False

C)

Can not say

D)

--

Correct Answer : True

Explanation : RESTful web services use HTTP methods to implement the concept of REST architecture.

59 .

What does the status code 302 represent?

A)

Not Modified

B)

User can select among multiple links and go to different page.

C)

The resource requested has been found and moved temporarily to new URL location.

D)

The page requested is available only by means of proxy address given in the response.

Correct Answer : The resource requested has been found and moved temporarily to new URL location.

60 .

Which of the following HTTP Status code means FORBIDDEN, states that user is not having access to method being used for example, delete access without admin rights?

A)

403

B)

404

C)

406

D)

409

Correct Answer : 403

Explanation : HTTP Status Code 403 means FORBIDDEN, states that user is not having access to method being used for example, delete access without admin rights

61 .

Which of the following is advantage of RESTful web service being stateless?

A)

Web services can treat each method request independently.

B)

Web services need not to maintain client's previous interactions. It simplifies application design.

C)

As HTTP is itself a statelessness protocol, RESTful Web services work seamlessly with HTTP protocol.

D)

All of the above.

Correct Answer : All of the above.

62 .

Which of the following directive of Cache Control Header of HTTP response indicates that resource is cachable by only client and server?

A)

Public

B)

Private

C)

max-age

D)

no-cache/no-store

Correct Answer : Private

63 .

Which of the following is correct about JAX-RS?

A)

It also provides supports for creating clients for RESTful web services.

B)

JAX-RS makes heavy use of annotations available from Java SE 5 to simplify development of JAVA based web services creation and deployment.

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Both (A) and (B)

64 .

Which of the following annotation of JAX RS API binds the parameter passed to method to a query parameter in path?

A)

@QueryParam

B)

@PathParam

C)

@MatrixParam

D)

@HeaderParam

Correct Answer : @QueryParam

Explanation : @QueryParam − Binds the parameter passed to method to a query parameter in path.

65 .

Which OAuth grant type can support a refresh token?

A)

Implicit Grant

B)

Authentication Grant

C)

Authorization Code Grant

D)

Client Credentials Grant

Correct Answer : Authorization Code Grant

66 .

What is the recommended method and URL pattern for retrieving a specific user?

A)

GET /users/{id}

B)

GET /user/{id}

C)

GET /user?id={id}

D)

GET /users?id={id}

Correct Answer : GET /users/{id}

67 .

What is the best way to track SDK and version usage?

A)

user agents

B)

polling users

C)

Accept headers

D)

tracking downloads

Correct Answer : tracking downloads

68 .

Which property would you use to include subresources directly into a JSON document?

A)

resources

B)

subresources

C)

_links

D)

_embedded

Correct Answer : subresources

69 .

What is the purpose of a link relation?

A)

to link two resources together

B)

to describe a resource and its purpose

C)

to describe subresources related to the current one

D)

to describe relationships between resources or actions

Correct Answer : to link two resources together

70 .

What additional type of token would you see when using OpenID Connect?

A)

access token

B)

refresh token

C)

ID token

D)

auth code token

Correct Answer : ID token