SOA Design & Architecture Lab - S90.09 Exam Practice Test
Question 1
Service Consumer A sends a message to Service A.
There are currently three duplicate implementations of Service A (Implementation 1, Implementation 2, Implementation 3).
The message sent by Service Consumer A is intercepted by Service Agent A (1), which
determines at runtime which implementation of Service A to forward the message to.
All three implementations of Service A reside on the same physical server.
You are told that despite the fact that duplicate implementations of Service A exist,
performance is still poor at times. Also, you are informed that a new service capability will
soon need to be added to Service A that will introduce functionality that will require access
to a shared database that is used by many other clients and applications in the IT
enterprise. This is expected to add further performance demands on Service A . How can
this service architecture be changed to improve performance in preparation for the addition
of the new service capability?
There are currently three duplicate implementations of Service A (Implementation 1, Implementation 2, Implementation 3).
The message sent by Service Consumer A is intercepted by Service Agent A (1), which
determines at runtime which implementation of Service A to forward the message to.
All three implementations of Service A reside on the same physical server.
You are told that despite the fact that duplicate implementations of Service A exist,
performance is still poor at times. Also, you are informed that a new service capability will
soon need to be added to Service A that will introduce functionality that will require access
to a shared database that is used by many other clients and applications in the IT
enterprise. This is expected to add further performance demands on Service A . How can
this service architecture be changed to improve performance in preparation for the addition
of the new service capability?
Correct Answer: A
Question 2
Service A is a task service that is required to carry out a series of updates to a set of
databases in order to complete a task. To perform the database updates Service A must
interact with three other services, each of which provides standardized data access
capabilities.
Service A sends its first update request message to Service B (1), which then responds
with a message containing a success or failure code (2). Service A then sends its second
update request message to Service C (3), which also responds with a message containing
a success or failure code (4). Finally, Service A sends a request message to Service D (5),
which responds with its own message containing a success or failure code (6).
You've been asked to change this service composition architecture in order to fulfill a set of
new requirements: First, if the database update performed by Service B fails, then it must
be logged by Service A.
Secondly, if the database update performed by Service C fails,
then a notification e-mail must be sent out to a human administrator. Third, if the database
update performed by either Service C or Service D fails, then both of these updates must
be reversed so that the respective databases are restored back to their original states.
What steps can be taken to fulfill these requirements?
databases in order to complete a task. To perform the database updates Service A must
interact with three other services, each of which provides standardized data access
capabilities.
Service A sends its first update request message to Service B (1), which then responds
with a message containing a success or failure code (2). Service A then sends its second
update request message to Service C (3), which also responds with a message containing
a success or failure code (4). Finally, Service A sends a request message to Service D (5),
which responds with its own message containing a success or failure code (6).
You've been asked to change this service composition architecture in order to fulfill a set of
new requirements: First, if the database update performed by Service B fails, then it must
be logged by Service A.
Secondly, if the database update performed by Service C fails,
then a notification e-mail must be sent out to a human administrator. Third, if the database
update performed by either Service C or Service D fails, then both of these updates must
be reversed so that the respective databases are restored back to their original states.
What steps can be taken to fulfill these requirements?
Correct Answer: D
Question 3
When Service A receives a message from Service Consumer A(1),the message is
processed by Component A.
This component first invokes Component B (2), which uses
values from the message to query Database A in order to retrieve additional data.
Component B then returns the additional data to Component A.
Component A then invokes Component C (3), which interacts with the API of a legacy
system to retrieve a new data value. Component C then returns the data value back to
Component A.
Next, Component A sends some of the data it has accumulated to Component D (4), which
writes the data to a te>X file that is placed in a specific folder. Component D then waits
until this file is imported into a different system via a regularly scheduled batch import.
Upon completion of the import, Component D returns a success or failure code back to
Component A.
Component A finally sends a response to Service Consumer A (5) containing all of the data
collected so far and Service Consumer A writes all of the data to Database B (6).
Components A, B, C.
and D belong to the Service A service architecture. Database A, the
legacy system, and the file folders are shared resources within the IT enterprise.
Service A is an entity service with a service architecture that has grown over the past few
years. As a result of a service inventory-wide redesign project, you are asked to revisit the
Service A service architecture in order to separate the logic provided by Components B, C,
and D into three different utility services without disrupting the behavior of Service A as it
relates to Service Consumer A . What steps can be taken to fulfill these requirements?
processed by Component A.
This component first invokes Component B (2), which uses
values from the message to query Database A in order to retrieve additional data.
Component B then returns the additional data to Component A.
Component A then invokes Component C (3), which interacts with the API of a legacy
system to retrieve a new data value. Component C then returns the data value back to
Component A.
Next, Component A sends some of the data it has accumulated to Component D (4), which
writes the data to a te>X file that is placed in a specific folder. Component D then waits
until this file is imported into a different system via a regularly scheduled batch import.
Upon completion of the import, Component D returns a success or failure code back to
Component A.
Component A finally sends a response to Service Consumer A (5) containing all of the data
collected so far and Service Consumer A writes all of the data to Database B (6).
Components A, B, C.
and D belong to the Service A service architecture. Database A, the
legacy system, and the file folders are shared resources within the IT enterprise.
Service A is an entity service with a service architecture that has grown over the past few
years. As a result of a service inventory-wide redesign project, you are asked to revisit the
Service A service architecture in order to separate the logic provided by Components B, C,
and D into three different utility services without disrupting the behavior of Service A as it
relates to Service Consumer A . What steps can be taken to fulfill these requirements?
Correct Answer: C
Question 4
When Service A receives a message from Service Consumer A(1),the message is
processed by Component A.
This component first invokes Component B (2), which uses values from the message to query Database A in order to retrieve additional data.
Component B then returns the additional data to Component A.
Component A then invokes Component C (3), which interacts with the API of a legacy
system to retrieve a new data value. Component C then returns the data value back to
Component A.
Next, Component A sends some of the data it has accumulated to Component D (4), which
writes the data to a text file that is placed in a specific folder. Component D then waits until
this file is imported into a different system via a regularly scheduled batch import. Upon
completion of the import, Component D returns a success or failure code back to
Component A.
Component A finally sends a response to Service Consumer A (5) containing all of the data
collected so far and Service Consumer A writes all of the data to Database B (6).
Components A, B, C.
and D belong to the Service A service architecture. Database A, the legacy system, and the file folders are shared resources within the IT enterprise.
Service A is a task service that completes an entire business task on its own without having
to compose other services. However, you have received many complaints about the
reliability of Service A . Specifically, it has three problems. First, when Component B
accesses Database A, it may not receive a response for several minutes when the
database is being accessed by other applications in the IT enterprise. Secondly, the legacy
system accessed by Component C frequently crashes and therefore becomes unavailable
for extended periods of time. Third, for Component D to respond to Component A, it must
first wait for the batch import of the files to occur. This can take several minutes during
which Service Consumer A remains stateful and consumes excessive memory. What steps
can be taken to address these three problems?
processed by Component A.
This component first invokes Component B (2), which uses values from the message to query Database A in order to retrieve additional data.
Component B then returns the additional data to Component A.
Component A then invokes Component C (3), which interacts with the API of a legacy
system to retrieve a new data value. Component C then returns the data value back to
Component A.
Next, Component A sends some of the data it has accumulated to Component D (4), which
writes the data to a text file that is placed in a specific folder. Component D then waits until
this file is imported into a different system via a regularly scheduled batch import. Upon
completion of the import, Component D returns a success or failure code back to
Component A.
Component A finally sends a response to Service Consumer A (5) containing all of the data
collected so far and Service Consumer A writes all of the data to Database B (6).
Components A, B, C.
and D belong to the Service A service architecture. Database A, the legacy system, and the file folders are shared resources within the IT enterprise.
Service A is a task service that completes an entire business task on its own without having
to compose other services. However, you have received many complaints about the
reliability of Service A . Specifically, it has three problems. First, when Component B
accesses Database A, it may not receive a response for several minutes when the
database is being accessed by other applications in the IT enterprise. Secondly, the legacy
system accessed by Component C frequently crashes and therefore becomes unavailable
for extended periods of time. Third, for Component D to respond to Component A, it must
first wait for the batch import of the files to occur. This can take several minutes during
which Service Consumer A remains stateful and consumes excessive memory. What steps
can be taken to address these three problems?
Correct Answer: D
