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Basic RESTful Services MCQ

1. The REpresentational State Transfer (REST) architectural style is based on the HTTP protocol.

It's complicated

False

True

Answer

Correct Answer: False

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2. Given a REST API that is capable of responding only with JSON, what is the appropriate way to respond to a request with header `Accept: application/xml; charset=utf-8`?

Respond with `415 Unsupported Media Type` error

Respond with `406 Not Acceptable` error

Respond with `406 Not Acceptable` error or respond successfully with JSON

Respond successfully with JSON

Respond with `415 Unsupported Media Type` error or respond successfully with JSON

Answer

Correct Answer: Respond with `406 Not Acceptable` error or respond successfully with JSON

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3. Which HTTP methods are idempotent?

GET, HEAD, POST and DELETE

GET, HEAD and DELETE

GET, HEAD

GET, HEAD, PUT, POST and DELETE

GET, HEAD, PUT and DELETE

Answer

Correct Answer: GET, HEAD, PUT and DELETE

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4. What is the appropriate error response for a request that sends an entity in XML with header `Content-Type: application/json` when the server only understands JSON.

200 OK with a resource that describes the error

406 Not Acceptable

400 Bad Request

415 Unsupported Media Type

Answer

Correct Answer: 400 Bad Request

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5. A POST request that results in the creation of a resource should respond with ______

A `201 Created` status and a `Location` header with a URI identifying where the resource can be retrieved with a GET request.

A `200 OK` or `204 No Content` status

A `200 OK` or `204 No Content` status and a `Location` header with a URI identifying where the resource can be retrieved with a GET request.

A `200 OK` status and a response entity identifying whether the request was successful or not.

Answer

Correct Answer: A `201 Created` status and a `Location` header with a URI identifying where the resource can be retrieved with a GET request.

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6. A PUT request that results in the creation of a new resource should respond with _____

A `200 OK` or `204 No Content` status code

A `201 Created` status code and a `Location` header identifying a URI where the created resource can be retrieved with a GET request.

A `200 OK` or `204 No Content` status code and a `Location` header identifying a URI where the created resource can be retrieved with a GET request.

A `201 Created` status code

A `200 OK` status code and an entity that identifies whether the request was successful or not.

Answer

Correct Answer: A `201 Created` status code

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7. Which HTTP method(s) should be used for creating a resource

Only PUT

Only POST

POST or PUT

You can use any HTTP method as long as you document the behavior

Answer

Correct Answer: POST or PUT

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8. A PUT request on a URI that only supports GET and POST should respond with _____

A `500 Internal Server Error` or `503 Service Unavaliable` status code

A `415 Unsupported Media Type` status code

A `405 Method Not Allowed` status code

A `404 Not Found` status code

A `200 OK` status code and a response entity describing the error

Answer

Correct Answer: A `405 Method Not Allowed` status code

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9. What is the appropriate error response for a request that sends an entity in XML (with header `Content-Type: application/xml; charset=UTF-8`) when the server only understands JSON.

406 Not Acceptable

400 Bad Request

200 OK with a resource that describes the error

415 Unsupported Media Type

Answer

Correct Answer: 415 Unsupported Media Type

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10. The process of determining which representation of a resource to respond with is called

Resource Negotiation

Content Negotiation

Media Negotiation

Representation Negotiation

Answer

Correct Answer: Content Negotiation

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11. Which is the foundational constraint in REST that defines the separation between service, consumer and the technical contract?

URL

Client server

Media

Cache

Answer

Correct Answer: Client server

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12. What is an appropriate HTTP response for issuing a GET request to /users/1/delete on a RESTful Web Service?

500 Internal Server Error

200 OK

302 Found

405 Method Not Allowed

Answer

Correct Answer: 405 Method Not Allowed

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13. Which of the following should not be present in RESTful Web Services URIs?

(All of these)

Nouns

Parameters. E.g. id, page, etc.

Verbs

Answer

Correct Answer: Verbs

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14. How might HATEOAS principles be applied in a RESTful web service?

Each response should include state of related resources

(all of these are correct)

Each response should include metadata about the resource, such as when the data is valid until

Each response should include links to the other related resources

Answer

Correct Answer: Each response should include links to the other related resources

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15. Which of the following is one of the interface constraints for REST that allows the server functionality to evolve independently?

API (Application Programming Interface)

HATEOAS (Hypertext As The Engine Of Application State)

SOAP (Simple Object Access Protocol)

WSS (Web Services Security)

Answer

Correct Answer: HATEOAS (Hypertext As The Engine Of Application State)

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16. Which of the following describe the correct way to let a client progress through states in a RESTful application?

A link in the response body pointing to the next state

There is no way to track states in RESTful applications

(None of these)

The server should track the state for the client

Answer

Correct Answer: A link in the response body pointing to the next state

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17. Who is responsible for tracking the application state on a system that communicates through a RESTful Web Service

Both client and server

(None of these)

Server

Client

Answer

Correct Answer: Client

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18. What is the mechanism that mediates communication, coordination or cooperation among components like data streams known as?

Configuration

Pattern

Connector

Architecture

Answer

Correct Answer: Connector

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19. True or False? In RESTful Web Services each URI can map to one or more resources.

False

True

Answer

Correct Answer: False

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20. True or False? It is a design flaw for RESTful Web Services to reveal data gradually, linking to additional resources on the response body.

True

False

Answer

Correct Answer: False

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21. PUTting to the following URI will do generally do what? /users/123/posts

Replace the entire posts collection for the user 123.

Fail to do anything

Add a new post

Answer

Correct Answer: Replace the entire posts collection for the user 123.

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22. Which software architecture is used for designing and developing software with "RESTful" interfaces?

Service Oriented Architecture

Enterprise Architecture

Software System Architecture

Resource Oriented Architecture

Answer

Correct Answer: Resource Oriented Architecture

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23. Identify which is not a formal REST constraint

Master Data

Cache Responses

Stateless Principle

Client-server

Answer

Correct Answer: Master Data

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24. Which HTTP methods are considered "safe", meaning that the request should not produce side-effects or alter the server state?

GET, POST, PUT and DELETE

HEAD, GET, OPTIONS and TRACE

HEAD, GET, PUT and OPTIONS

HEAD, POST, GET and PUT

Answer

Correct Answer: HEAD, GET, OPTIONS and TRACE

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25. Suppose you're writing a REST resource for listing all coments made by an user. Which would be the most appropriate URI?

/user/id?fields=comments

/comments?user={id}

/comments/user/{id}

/users/{id}/comments

Answer

Correct Answer: /users/{id}/comments

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26. True or False? RESTful responses should include links to related resources, enabling the Client to progress through states.

False

True

Answer

Correct Answer: True

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27. Which of the following cannot be considered a REST design principle

(None of these)

Stateless

Makes use of standard HTTP methods

Client-server separation

Answer

Correct Answer: (None of these)

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28. How is REST related to SOAP?

SOAP is a subset of REST that is stricter

REST is a subset of SOAP that is stricter

REST is an alternative to SOAP

REST is the same as SOAP, except that REST does not specify that the format of interchange is XML

Answer

Correct Answer: REST is an alternative to SOAP

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29. Statelessness is one of the formal constraint of REST Web Service, which feature is addressed due to absence of state on the server?

Modifies components to meet changing needs while an application is running

Uniform interface separates each client from the server

A default page or resource is provided as a response

Improves Web service performance as it removes the need to synchronize session data with an external application

Answer

Correct Answer: Improves Web service performance as it removes the need to synchronize session data with an external application

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30. How can users log into RESTful API to see protected resources only?

It depends on entitlement per Data Protection Act

Since server is stateless, client has to provide all information to make request

Encryption and Decryption technology addresses the need

Users apply for permission to enable them to login

Answer

Correct Answer: Since server is stateless, client has to provide all information to make request

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31. Which of the following best describe REST?

a framework

a standard

(None of these)

an architectural style

Answer

Correct Answer: an architectural style

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32. What determines the action to be executed on a RESTful request?

HTTP Method

Verb on URI

Query string parameters

Verb on request body

Answer

Correct Answer: HTTP Method

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33. As an idempotent method, which of the following should not happen when issuing a GET request to a RESTful Web Service?

Return resource data

Increment an internal counter

Update a resource entry

Log the request data

Answer

Correct Answer: Update a resource entry

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34. RESTful web services must be stateful

False

True

Answer

Correct Answer: False

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35. Which of the following best describes a RESTful service?

Web Services with focus on system resources and transfer of state of resource over http by a wide range of clients written in different languages

An application protocol for distributed, collaborative, hypermedia information systems.

Structured text that uses hyperlinks between nodes containing text to exchange or transfer hypertext

A protocol specification for exchanging structured information in the implementation of Web Services in computer networks

Answer

Correct Answer: Web Services with focus on system resources and transfer of state of resource over http by a wide range of clients written in different languages

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36. Which is the preferred method of determining the format of the data being transfered in a RESTful request?

Extension in URI. E.g. /users.json

HTTP Content-Type header

A string containing MIME-Type in the HTTP body

Inference from the HTTP method used

Answer

Correct Answer: HTTP Content-Type header

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37. Identify the item which is not an intermediary for communication in REST

Proxies

Firewalls

Gateways

Viruses

Answer

Correct Answer: Viruses

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38. What is the key difference between RESTful web services and SOAP web services?

REST uses HTTP protocol for producing or consuming web services while SOAP uses XML

SOAP is transport protocol specific whereas REST is transport protocol neutral

SOAP can be cached and REST cannot be cached

SOAP is more lightweight as compared to REST

Answer

Correct Answer: REST uses HTTP protocol for producing or consuming web services while SOAP uses XML

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39. True of False? REST, being an architectural style, does not concern implementation details

True

False

Answer

Correct Answer: True

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40. Which data formats can be transfered through RESTful Web Services?

Any format

JSON

XML

Haml

Answer

Correct Answer: Any format

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41. Which of the following is true of RESTful Web Service?

No transfer of XML

Use HTTP methods explicitly

Inconsistent with protocol definition

Caters to any client in one language

Answer

Correct Answer: Use HTTP methods explicitly

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42. When you wish to update an existing “Foo” via a RESTful API, which is most appropriate?

DELETE /api/foos/123

POST /api/foos/123

GET /api/foos/123

PUT /api/foos/123

Answer

Correct Answer: PUT /api/foos/123

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43. What are the prerequisites for an application to interact with a resource?

Identifier of the resource and Action required

Well managed cache control

Code on demand

Format of the presentation

Answer

Correct Answer: Identifier of the resource and Action required

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44. What is the advantage of including Cache control and Last-Modified (a date value) HTTP response header?

Improves performance by reducing the requests for duplicate resources

Includes links to subordinate resources to keep them connected

Resources organized by date for using hierarchical syntax

Avoids query strings

Answer

Correct Answer: Improves performance by reducing the requests for duplicate resources

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45. When you wish to create a new “Foo” via a RESTful API, which is most appropriate?

PUT /api/foos

POST /api/foos

DELETE /api/foos

GET /api/foos

Answer

Correct Answer: POST /api/foos

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46. REST is an acronym for representational state transfer

True

False

Answer

Correct Answer: True

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47. Consider a RESTful resource available on the URI /posts. Which is the correct HTTP method used to create a new entry?

GET

PUT

POST

HEAD

Answer

Correct Answer: POST

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48. Which is a true statement in the basic REST design principle that uses HTTP request methods to update resources?

To create a resource on the server, use EXECUTE

To create a resource on the server, use POST

To create a resource on the server, use CREATE

To create a resource on the server, use ADD

Answer

Correct Answer: To create a resource on the server, use POST

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49. RESTful web services are designed with ____ in mind.

Peer to peer communications

Encrypted communications

Client-server communications

Raw socket data transfer communications

Answer

Correct Answer: Client-server communications

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50. What happens if Restful resources are accessed by multiple clients?

Multiple clients can safely access Restful resources concurrently

XML protocol will be used to access clients

SOAP service will be implemented

Synchronization will be made to the Restful resource request

Answer

Correct Answer: Multiple clients can safely access Restful resources concurrently

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51. Which request would best describe removing an user in a RESTful Web Service?

DELETE /users/1

GET /users/delete?id=1

PUT /users/delete/1

POST /users/1

Answer

Correct Answer: DELETE /users/1

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52. When you wish to delete an existing “Foo” via a RESTful API, which is most appropriate?

DELETE /api/foos/123

GET /api/foos/123

PUT /api/foos/123

POST /api/foos/123

Answer

Correct Answer: DELETE /api/foos/123

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53. When you wish to read a single “Foo” via a RESTful API, which is most appropriate?

PUT /api/foos/123

DELETE /api/foos/123

POST /api/foos/123

GET /api/foos/123

Answer

Correct Answer: GET /api/foos/123

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54. Which HTTP method should be used to update a resource in a RESTful Web Service?

POST

DELETE

PUT

GET

Answer

Correct Answer: PUT

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55. In the context of a web service, a RESTful API should...

(none of these are correct)

Make individual resources available at unique URIs

Make individual reources available at the same URI

Answer

Correct Answer: Make individual resources available at unique URIs

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56. A RESTful Web Service URI should map to __________________?

(All of these)

a file on the disk

a method on a class

an entity or resource

Answer

Correct Answer: an entity or resource

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57. When you wish to read a collection of “Foo” via a RESTful API, which is most appropriate?

POST /api/foos

PUT /api/foos

DELETE /api/foos

GET /api/foos

Answer

Correct Answer: GET /api/foos

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