How to pass SOA S90.09 exam with the help of dumps?

Question # 1

Our service inventory contains the following three services that provide invoice-related dataaccess capabilities: Invoice, InvProc, and Proclnv. These services were created at differenttimes by different project teams and were not required to comply to any design standards.Therefore each of these services has a different data model for representing invoice data.Currently each of these three services has one service consumer: Service Consumer Aaccesses the Invoice service(1). Service Consumer B (2) accesses the InvProc service,and Service Consumer C (3) accesses the Proclnv service. Each service consumerinvokes a data access capability of an invoice-related service, requiring that service tointeract with the shared accounting database that is used by all invoice-related services (4,5, 6).Additionally, Service Consumer D was designed to access invoice data from the sharedaccounting database directly (7), (Within the context of this architecture. Service ConsumerD is labeled as a service consumer because it is accessing a resource that is related to theillustrated service architectures.)Assuming that the Invoice service, InvProc service, and ProcInv service are part of thesame service inventory, what steps would be required to fully apply the Official Endpointpattern?

A. One of the invoice-related services needs to be chosen as the official service providinginvoice data access capabilities. Service Consumers A, B, and C then need to beredesigned to only access the chosen invoice-related service. Because Service ConsumerD does not rely on an invoice-related service, it is not affected by the Official Endpointpattern and can continue to access the accounting database directly. The ServiceAbstraction principle can be further applied to hide the existence of the shared accountingdatabase and other implementation details from current and future service consumers.
B. One of the invoice-related services needs to be chosen as the official service providinginvoice data access capabilities. Service Consumers A, B, and C then need to beredesigned to only access the chosen invoice-related service. Service Consumer D alsoneeds to be redesigned to not access the shared accounting database directly, but to alsoperform its data access by interacting with the official invoice-related service. The ServiceAbstraction principle can be further applied to hide the existence of the shared accountingdatabase and other implementation details from current and future service consumers.
C. Because Service Consumers A, B, and C are already carrying out their data access viapublished contracts, they are not affected by the Official Endpoint pattern. ServiceConsumer D needs to be redesigned to not access the shared accounting databasedirectly, but to perform its data access by interacting with the official invoice-related service.The Service Abstraction principle can be further applied to hide the existence of the sharedaccounting database and other implementation details from current and future serviceconsumers.
D. None of the above.

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Question # 2

The Client and Vendor services are agnostic services that are both currently part ofmultiple service compositions. As a result, these services are sometimes subjected toconcurrent access by multiple service consumers.The Client service is an entity service that primarily provides data access logic to a clientdatabase but also provides some calculation logic associated with determining a client'scredit rating. The Vendor service is also an entity service that provides some data accesslogic but can also generate various dynamic reports.After reviewing historical statistics about the runtime activity of the two services, it wasdiscovered that the majority of concurrent runtime access is related to the processing ofbusiness rules. With the Client service, it is the calculation logic that is frequently requiredand with the Vendor service it is the dynamic reporting logic that needs to be accessedseparately from the actual report generation.Currently, due to the increasing amount of concurrent access by service consumers, theruntime performance of both the Client and Vendor services has worsened and hastherefore reduced their effectiveness as service composition members. What steps can betaken to solve this problem without introducing new services?

A. The Rules Centralization pattern can be applied by extracting the business rule logicfrom the Client and Vendor services and placing it into a new Rules service. This willnaturally improve the runtime performance of the Client and Vendor services because theywill no longer be subjected to the high concurrent access of service consumers that requireaccess to the business rules logic.
B. The Redundant Implementation pattern can be applied to the Client and Vendorservices, thereby establishing duplicate implementations that can be accessed when aservice reaches its runtime usage threshold. The Intermediate Routing pattern can befurther applied to provide load balancing logic that can, at runtime, determine which of theredundant service implementations is the least busy for a given service consumer request.
C. The Rules Centralization pattern can be applied together with the RedundantImplementation pattern to establish a scalable Rules service that is redundantlyimplemented and therefore capable of supporting high concurrent access from manyservice consumers. The Service Abstraction principle can be further applied to hide theimplementation details of the Rules service.
D. None of the above.

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Question # 3

Service A is a task service that is required to carry out a series of updates to a set ofdatabases in order to complete a task. To perform the database updates Service A mustinteract with three other services, each of which provides standardized data accesscapabilities.Service A sends its first update request message to Service B (1), which then respondswith a message containing a success or failure code (2). Service A then sends its secondupdate request message to Service C (3), which also responds with a message containinga 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 given a requirement that all database updates must either be completedsuccessfully or not at all. This means that if any of the three response messages receivedby Service A contain a failure code, all of the updates carried out until that point must bereversed. Note that if Service A does not receive a response message back from ServicesB, C, or D, it must assume that a failure has occurred. How can this service compositionarchitecture be changed to fulfill these requirements?

A. The Reliable Messaging pattern can be applied to guarantee the delivery of positive ornegative acknowledgements. This way, Service A will always be informed of whether afailure condition has occurred with any of the database updates performed by Services B,C, and D. Furthermore, the Service Loose Coupling principle can be applied to ensure thatthe request and response messages exchanged by the services do not contain anyimplementation details that would indirectly couple Service A to any of the databases.
B. The Atomic Service Transaction pattern can be applied individually to Services B, C,and D so that each of these services performs its own database update within the scope ofan atomic transaction. If anyone update fails, that change can be rolled back on thatdatabase. Furthermore, the Service Loose Coupling principle can be applied to ensure thatService A is kept out of the scope of the atomic transaction so that it is not negativelycoupled to the proprietary database technologies that are required to enable the atomictransaction functionality.
C. The Compensating Service Transaction can be applied to Service A so that when anyone response message containing a failure code is received by Service A, it can invokeexception handling logic that will log the failed database updates. The Service LooseCoupling principle can be further applied to ensure that Services B, C, or D are notindirectly coupled to the exception handling logic, especially if Service A requires additionalaccess to Services B, C, or D in order to collect more information for logging purposes.
D. None of the above.

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Question # 4

Service A is an entity service that provides a Get capability that returns a data value that isfrequently changed.Service Consumer A invokes Service A in order to request this data value (1). For ServiceA to carry out this request, it must invoke Service B (2), a utility service that interacts (3.4)with the database in which the data value is stored, Regardless of whether the data valuechanged. Service B returns the latest value to Service A (5), and Service A returns thelatest value to Service Consumer A (6).The data value is changed when the legacy client program updates the database (7). Whenthis change happens is not predictable. Note also that Service A and Service B are notalways available at the same time.Any time the data value changes. Service Consumer A needs to receive it as soon aspossible. Therefore, Service Consumer A initiates the message exchange shown in theFigure several times a day. When it receives the same data value as before, the responsefrom Service A is ignored. When Service A provides an updated data value, ServiceConsumer A can process it to carry out its task.Because Service A and Service B are not always available at the same times, messagesare getting lost and several invocation attempts by Service Consumer A fail. What stepscan be taken to solve this problem?

A. The Asynchronous Queuing pattern can be applied so that messaging queues areestablished between Service A and Service B and between Service Consumer A andService A . This way, messages are never lost due to the unavailability of Service A orService B .
B. The Asynchronous Queuing pattern can be applied so that a messaging queue isestablished between Service A and Service B . This way, messages are never lost due tothe unavailability of Service A or Service B . The Service Agent pattern can be furtherapplied to establish a service agent that makes a log entry and issues a notification whenre-transmission attempts by the messaging queue exceeds a pre-determined quantity.
C. The Asynchronous Queuing pattern can be applied so that a messaging queue isestablished between Service Consumer A and Service A. This way, messages are neverlost due to the unavailability of Service A or Service B. The Service Agent pattern can befurther applied to establish a service agent that makes a log entry each time a runtimeexception occurs.
D. None of the above.

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Question # 5

Service Consumer A sends a message to Service A (1), which then forwards the messageto Service B (2). Service B forwards the message to Service C (3), which finally forwardsthe message to Service D (4).Services A, B, and C each contain logic that reads the content of the message and, basedon this content, determines which service to forward the message to. As a result, what isshown in the Figure is one of several possible runtime scenarios.You are told that the current service composition architecture is having performanceproblems because of two specific reasons. First, too many services need to be explicitlyinvoked in order for the message to arrive at its destination. Secondly, because each of theintermediary services is required to read the entire message contents in order to determinewhere to forward the message to, it is taking too long for the overall task to complete. Whatsteps can be taken to solve these problems without sacrificing any of the functionality thatcurrently exists?

A. The Intermediate Routing pattern can be applied together with the Service Agent patternin order to establish a set of service agents capable of intercepting and forwarding themessage based on pre-defined routing logic. To avoid the need for service agents to readthe entire message contents, the Messaging Metadata pattern can be applied so thatcontent relevant to the routing logic is placed in the header of a message. This way, onlythe message header content needs to be read by the service agents.
B. The Intermediate Routing pattern can be applied together with the Service Agent patternin order to establish a set of service agents capable of intercepting and forwarding themessage based on pre-defined routing logic. To avoid the need for service agents to readthe entire message contents, the Rules Centralization pattern can be applied so thatcontent relevant to the routing logic is isolated into a separate Rules service. This way,service agents are only required to access the Rules service in order to determine where toforward messages to. The Standardized Service Contract principle will need to be appliedto ensure that the new Rules service and the new service agents provide service contractsthat are compliant to existing design standards.
C. The Intermediate Routing pattern can be applied together with the Service Agent patternin order to establish a set of service agents capable of intercepting and forwarding themessage based on pre-defined routing logic. The Service Discoverability principle can beapplied to improve the communications quality of message contents, which will reduce thetime required by service agents to read the message contents at runtime.
D. None of the above.

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Question # 6

Service A is a utility service that provides generic data access logic to a database thatcontains data that is periodically replicated from a shared database (1). Because theStandardized Service Contract principle was applied to the design of Service A, its servicecontract has been fully standardized.Service A is being accessed by three service consumers. Service Consumer A accesses acomponent that is part of the Service A implementation by invoking it directly (2). ServiceConsumer B invokes Service A by accessing its service contract (3). Service Consumer Cdirectly accesses the replicated database that is part of the Service A implementation (4).You've been told that the reason Service Consumers A and C bypass the publishedService A service contract is because, for security reasons, they are not allowed to accessa subset of the operations in the WSDL definition that expresses the service contract. Howcan the Service A architecture be changed to enforce these security restrictions whileavoiding negative forms of coupling?

A. The Contract Centralization pattern can be applied to force all service consumers toaccess the Service A architecture via its published service contract. This will preventnegative forms of coupling that could lead to problems when the database is replaced. TheService Abstraction principle can then be applied to hide underlying service architecturedetails so that future service consumers cannot be designed to access any part of theunderlying service implementation.
B. The Contract Centralization pattern can be applied to force service consumers to accessthe Service A architecture via its published service contract only. The Service LooseCoupling principle can then be applied to ensure that the centralized service contract doesnot contain any content that is dependent on or derived from the underlying serviceimplementation.
C. The Concurrent Contracts pattern can be applied to Service A in order to establish oneor more alternative service contracts. This allows service consumers with different levels ofsecurity clearance to continue accessing the service logic via its published servicecontracts.
D. None of the above.

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Question # 7

Services A, B, and C are non-agnostic task services. Service A and Service B use thesame shared state database to defer their state data at runtime.An assessment of these three services reveals that each contains some agnostic logic, butbecause it is bundled together with the non-agnostic logic, the agnostic logic cannot bemade available for reuse.The assessment also determines that because Service A and Service B and the sharedstate database are each located in physically separate environments, the remotecommunication required for Service A and Service B to interact with the shared statedatabase is causing an unreasonable decrease in runtime performance.How can the application of the Orchestration pattern improve this architecture?

A. The application of the Orchestration pattern will result in an environment whereby theState Repository and Service Data Replication patterns are naturally applied, allowing theshared state database to be replicated for Services A and B so that each task service canhave its own dedicated state database. The Process Centralization pattern can also beapplied to Services A and B, so that their logic is physically centralized, turning them intoorchestrated task services.
B. The application of the Orchestration pattern will result in an environment whereby theProcess Abstraction and Process Centralization patterns are naturally applied to ServicesA, B, and C, resulting in a clean separation of non-agnostic task services from newlydesigned agnostic services with reuse potential. Also, the State Repository pattern can beapplied by the availability of a central state database that can be shared by Services A andB. This database can be made available as a local part of the environment so that ServicesA and B can avoid remote communication.
C. The application of the Orchestration pattern will result in an environment whereby theCompensating Service Transaction is naturally applied, resulting in the opportunity tocreate sophisticated exception logic that can be used to compensate for the performanceproblems caused by Services A and B having to remotely access the state database. TheProcess Abstraction and Service Broker patterns are also naturally applied, enabling theseparation of non-agnostic logic and agnostic logic while providing common transformationfunctions required to overcome any disparity in the service contracts that will need to becreated for the new agnostic services.
D. None of the above.

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Question # 8

Service A. Service B. and Service C are each designed to access the same shared legacysystem. The service contracts for Service A, Service B, and Service C are standardizedand decoupled from the underlying service logic. Service A and Service B are agnosticservices that are frequently reused by different service compositions. Service C is a nonagnostic task service that requires access to the legacy system in order to retrievebusiness rules required for the service to make runtime decisions that determine its servicecomposition logic. The legacy system uses a proprietary file format that Services A, B, andC need to convert to and from.Service A is an agnostic utility service that is used by other services to gain access to thelegacy system. Services B and C were not designed to access the legacy system viaService A because the Service A service contract was derived from the legacy system APIand is therefore not standardized and exhibits negative contract-to-implementationcoupling. You are told that additional services need to be created, all of which need accessto the legacy system. You are also told that the legacy system may be replaced in the nearfuture. What steps can be taken to ensure that the replacement of the legacy system has aminimal impact on Services B and C and any future services that are designed to rely uponit?

A. The Service Abstraction, Service Reusability, and Service Autonomy principles need tobe applied in order to support the application of the Official Endpoint pattern to Service A .This would position Service A as the official utility service through which the legacy systemcan be accessed. Service B will need to be redesigned to access Service A instead ofaccessing the legacy system directly. Due to the dependency on business rules embeddedwithin the legacy system the option of applying the Rules Centralization pattern is notavailable. Service C will therefore need to continue accessing the legacy system directly.
B. The Standardized Service Contract and Service Loose Coupling principles can beapplied in order to establish a standardized service contract for Service A that will eliminateits negative contract coupling. Service B will need to be redesigned to access Service Ainstead of accessing the legacy system directly. Due to the dependency on business rulesembedded within the legacy system the option of applying the Rules Centralization patternis not available. Service C will therefore need to continue accessing the legacy systemdirectly.
C. The Legacy Wrapper pattern can be applied together with the Standardized ServiceContract principle in order to establish a standardized service contract for Service A thatwill eliminate its negative contract coupling. The Official Endpoint pattern can then beapplied to position Service A as the official utility service through which the legacy systemcan be accessed. Services B and C will need to be redesigned to access Service A insteadof accessing the legacy system directly.
D. None of the above.

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