SOAP MCQ

SOAP stands for Simple Object Access Protocol. It is a protocol specification for exchanging structured information in the implementation of web services. It relies heavily on XML and operates over application layer protocols, most commonly HTTP. This guide is designed to test your foundational knowledge of SOAP through carefully curated multiple-choice questions. Let's dive in!

1. What does SOAP stand for?

a) Simple Open Access Protocol
b) System Object Application Protocol
c) Simple Object Application Protocol
d) Simple Object Access Protocol

Answer:

d) Simple Object Access Protocol

Explanation:

SOAP stands for Simple Object Access Protocol, and it's a messaging protocol for exchanging information in the form of XML.

2. Which protocol is primarily used by SOAP for message negotiation and transmission?

a) FTP
b) SMTP
c) HTTP
d) TCP

Answer:

c) HTTP

Explanation:

Although SOAP can operate over various protocols, HTTP is the primary and most popular choice.

3. In SOAP, which of the following is used to encode XML data and generate XML-based messages?

a) SOAP Data Encoding Rules
b) XML-RPC
c) JSON
d) SOAP Encoding Rules

Answer:

d) SOAP Encoding Rules

Explanation:

SOAP Encoding Rules are used for encoding XML data and for generating XML-based messages.

4. What is the primary purpose of the SOAP envelope element?

a) To specify the destination of the SOAP message.
b) To define the start and end of a message.
c) To encrypt the SOAP message.
d) To compress the SOAP message.

Answer:

b) To define the start and end of a message.

Explanation:

The SOAP envelope element is the root element of a SOAP message, defining its start and end.

5. Which element in SOAP contains actual application-specific data?

a) Header
b) Body
c) Envelope
d) Fault

Answer:

b) Body

Explanation:

The SOAP Body element contains the actual application-specific data.

6. Which of the following can be used with SOAP to ensure that the message reaches its intended user without unauthorized interception?

a) SSL/TLS
b) XML Encryption
c) Both a and b
d) None of the above

Answer:

c) Both a and b

Explanation:

Both SSL/TLS for securing the communication channel and XML Encryption for securing message content can be used with SOAP.

7. Which SOAP element is used for reporting errors?

a) Header
b) Envelope
c) Body
d) Fault

Answer:

d) Fault

Explanation:

The SOAP Fault element provides information about errors that occurred while processing the message.

8. SOAP messages are in which format?

a) JSON
b) CSV
c) XML
d) HTML

Answer:

c) XML

Explanation:

SOAP messages are structured using XML.

9. What is the standard port for SOAP over HTTP?

a) 8080
b) 25
c) 21
d) 80

Answer:

d) 80

Explanation:

The standard port for HTTP is 80, and thus, for SOAP over HTTP, it's the same.

10. Which of the following is a protocol-independent web services specification, in competition with SOAP?

a) GraphQL
b) JSON-RPC
c) REST
d) WebSocket

Answer:

c) REST

Explanation:

REST, or Representational State Transfer, is an architectural style and protocol-independent specification in competition with SOAP.

11. Which of the following is NOT true about SOAP?

a) SOAP is lightweight.
b) SOAP is based on XML.
c) SOAP is stateless by nature.
d) SOAP can't be used over SMTP.

Answer:

a) SOAP is lightweight.

Explanation:

SOAP is not as lightweight as alternatives like REST. Being XML-based, SOAP messages can be heavier and require more bandwidth.

12. In a SOAP message, where are the optional attributes (like authentication) primarily found?

a) Envelope
b) Body
c) Header
d) Fault

Answer:

c) Header

Explanation:

Optional attributes that are not part of the actual data, such as authentication tokens, are typically placed in the SOAP Header.

13. Which of the following provides a standard way to describe the operations and location of a web service in SOAP?

a) SOAP Location Protocol
b) Web Services Description Language (WSDL)
c) SOAP Protocol Description
d) Web Services Markup Language (WSML)

Answer:

b) Web Services Description Language (WSDL)

Explanation:

WSDL describes the operations and location of a web service, giving clients the necessary details to interact with the service.

14. What role does the actor attribute play in a SOAP message?

a) Specifies the character encoding for the message.
b) Denotes the role of the node that should process the header.
c) Signifies the priority of the message.
d) Indicates the size of the SOAP message.

Answer:

b) Denotes the role of the node that should process the header.

Explanation:

The actor attribute in a SOAP header specifies which node in the message path the header is intended for.

15. Which SOAP feature allows for messages to be sent from a client to a server and then back from the server to the client?

a) SOAP Encoding Rules
b) SOAP Remote Procedure Call (RPC)
c) SOAP Message Transmission
d) SOAP One-way Messaging

Answer:

b) SOAP Remote Procedure Call (RPC)

Explanation:

SOAP RPC allows for a round-trip message: from the client to the server and a response from the server back to the client.

16. Which of the following is not a SOAP Fault code value?

a) VersionMismatch
b) MustUnderstand
c) ClientTimeout
d) Server

Answer:

c) ClientTimeout

Explanation:

"ClientTimeout" is not a standard SOAP Fault code value. The others are valid fault code values.

17. In which layer of the OSI model does SOAP operate?

a) Transport Layer
b) Presentation Layer
c) Application Layer
d) Session Layer

Answer:

c) Application Layer

Explanation:

SOAP operates at the Application Layer, facilitating communication between applications.

18. Which of the following is a key characteristic of SOAP 1.2 when compared to SOAP 1.1?

a) Removal of XML namespaces
b) No support for HTTP as a transport protocol
c) Introduction of the role attribute to replace actor
d) Discontinuation of the Fault element

Answer:

c) Introduction of the role attribute to replace actor

Explanation:

In SOAP 1.2, the role attribute was introduced, replacing the actor attribute from SOAP 1.1.

19. Which of the following HTTP status codes indicates a successful SOAP message request and response?

a) 404 Not Found
b) 500 Internal Server Error
c) 200 OK
d) 403 Forbidden

Answer:

c) 200 OK

Explanation:

An HTTP status code of "200 OK" indicates a successful SOAP request and response.

20. What is the primary reason for using the MustUnderstand attribute in a SOAP header?

a) To specify that the header must be encrypted.
b) To ensure that the header is understood and can be processed by the receiver.
c) To indicate that the header is optional.
d) To signify that the header should be ignored by intermediaries.

Answer:

b) To ensure that the header is understood and can be processed by the receiver.

Explanation:

The MustUnderstand attribute, when set to "1", indicates that the receiver must recognize and process the header. If it can't, a fault is generated.



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