S90-02A SOA Technology Concepts (S90-02A)

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SOA · S90-02A

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Question 1

Single choice

A SOAP-based Web service is essentially: Select the correct answer.

A
solution logic that can only be accessed via HTTP methods
B
solution logic accessible via binary RPC protocols
C
solution logic that has been shaped by service-orientation design principles
D
solution logic that can be accessed via a published WSDL definition

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Correct answerD

Question 2

Multiple choice

Which of the following statements are true? SELECT ALL THAT APPLY

A
A service can exist as a component.
B
A service can exist as a SOAP-based Web service.
C
A service can encapsulate one or more components.
D
A service can encapsulate one or more SOAP-based Web services.

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Correct answersA, B, C

Question 3

Single choice

Using WS-AtomicTransaction you wrap 3 SOAP-based Web services in a single transaction. When it is time to vote on the outcome of the transaction, 2 of the services vote to commit the changes made during the transaction, but a vote from the third service is not received. What will happen? Select the correct answer.

A
The changes are committed because the transaction is considered successful as long as no Abort votes are received.
B
The changes are rolled back because the transaction is considered unsuccessful when there is a missing vote.
C
The changes are committed because the transaction is considered successful as long as one Commit vote is received.
D
The changes are aborted because a transaction can only be considered successful when more than 2
Commit votes are received.

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Correct answerB

Question 4

Single choice

Which of the following statements is true? Select the correct answer.

A
A service enters the service provider role when it initiates contact with other services, including those that act as intermediaries.
B
A service enters the service provider role when it initiates contact with intermediaries only.
C
A service enters the service provider role when it is accessed by other service consumers, including intermediaries.
D
A service enters the service provider role when it is accessed by intermediaries only.

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Correct answerC

Question 5

Single choice

Which of the following statements makes sense? Select the correct answer.

A
I designed a unique XML schema for each of my REST services so that the HTTP methods used by these services are consistently named.
B
My REST services are limited to the use of the GET HTTP method because only one XML schema was designed for all of them. In order to support additional HTTP methods, additional XML schemas will need to be designed due to the inherent dependency HTTP has on the XML Schema Definition Language.
C
I designed my REST services to share the same XML schema.
D
XML schemas cannot be used by REST services.

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Correct answerC

Question 6

Single choice

MEP stands for: Select the correct answer.

A
Message Extension Pair
B
Message Exchange Pattern
C
Mixed Entry Platform
D
Mixed Elevation Program

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Correct answerB

Question 7

Single choice

Which of the following technologies has a namespace pre-defined by an industry standards organization?
Select the correct answer.

A
WS-Addressing
B
REST
C
Web 2.0
D
Because all Web-based technologies are required to have namespaces, all of the above technologies
have pre-defined namespaces.

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Correct answerA

Question 8

Single choice

Which of the following statements is true? Select the correct answer.

A
WS-BusinessActivity is used for short-running, ACID-style transactions that can be rolled back to their original state.
B
WS-BusinessActivity is used for long-running transactions that are not expected to be rolled back to their original state.
C
WS-BusinessActivity provides an alternative to WS-Coordination.
D
None of these statements are true.

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Correct answerB

Question 9

Single choice

A SOAP-based Web service is required to transmit an XML-based invoice document to a REST service.
However, the SOAP-based Web service is designed to represent invoice data using an XML schema that is different from the XML schema used within the REST service. How can the disparity between the XML schemas, used by these two services, be overcome so that they can exchange the invoice document?
Select the correct answer.

A
A layer of data format transformation logic needs to be introduced based on mashup technologies, such as DTD and WS-Transform.
B
A layer of protocol transformation logic needs to be introduced based on Web technologies, such as HTTP and FTP.
C
A layer of data model transformation logic needs to be introduced, based on XML technologies, such as XSLT.
D
There is no technique or technology for overcoming differences between XML schemas.

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Correct answerC

Question 10

Multiple choice

Which of the following service designs are considered not supportive of service-orientation due to improper selection of technologies? SELECT ALL THAT APPLY

A
A REST service designed to respond to service consumers via standard HTTP response codes.
B
A SOAP-based Web service designed with a service contract that includes WS-Policy definitions that
disallow communication using SOAP messages.
C
A reusable component-based service designed to reject messages containing XML so as to limit communication to RPC-centric MEPs.
D
A SOAP-based Web service designed with a decoupled service contract that includes a standardized
XML schema.

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Correct answersB, C

Question 11

Single choice

Which of the following statements is true? Select the correct answer.

A
WS-ReliableMessaging establishes a framework that provides an industry-standard means of
transforming XML schema-based data models.
B
WS-ReliableMessaging establishes a framework that provides an industry-standard means of rolling back changes that occur during a runtime service transaction.
C
WS-ReliableMessaging establishes a framework that provides an industry-standard means of reliably
communicating policy enforcement rules.
D
None of these statements are true.

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Correct answerD

Question 12

Single choice

Which of the following technologies can be used to enable the exchange of data between services? Select the correct answer.

A
SOAP
B
HTTP
C
WSDL
D
All of the above.

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Correct answerD

Question 13

Single choice

A namespace can be considered a form of: Select the correct answer.

A
unique identifier
B
redundant identifier
C
duplicate identifier
D
Namespaces are not identifiers; they are always pre-defined values that we are required to work with.

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Correct answerA

Question 14

Single choice

Which of the following service technologies is primarily associated with service discovery? Select the correct answer.

A
RPC
B
DTD
C
UDDI
D
SAML

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Correct answerC