Oracle Oracle Certifications 1Z0-574 Questions & Answers

• Question 81:

  You are working with an IT department that has embraced Service-Oriented Integration (SOI). The development team has created a catalog of services that rigidly follow the layering of the SOI architecture as illustrated by the Logical View. Clients are allowed to call only Business Process Services, Business Process Services only call Business Services, Business Services only call Data Services, and so on, with each call going through the Mediation Layer. Unfortunately, the quality assurance team has discovered during user acceptance testing that the latency of applications the Business Process Services is unacceptable.

  What advice would you give the development team to help reduce the latency without sacrificing adherence to the SOI architecture?

  A. Change the SOA Services to bypass the Mediation Layer when calling other SOA Services. The Mediation Layer should be used only between the clients and the SOA Services. The Mediation Layer should not be used between SOA Services.

  B. The developers are accurately following the SOI architecture. Reducing the latency will require that some of the SOI architecture concepts be relaxed or violated.

  C. Remove all data transformation from the Mediation Layer because data transformations are too computationally expensive, where required, change the interface of the SOA Services to use a single data model so that data transformations are not needed.

  D. Allow clients and SOA Services to use large-granularity operations. Each operation on the Business Process Service should return an entire data entity or multiple data entities. This reduces the number of client calls required and, therefore, the overall latency.

  Correct Answer: D

  Explanation:

  Reducing the number of calls could reduce latency.

  Note: The Mediation Layer provides loose coupling for the entire architecture. It decouples the layers of the

  architecture as well as decoupling external users of the layers from the specific layers in the architecture.

  The primary purpose of this layer in the architecture is to facilitate communication between layers in the

  architecture and between this architecture and the systems that connect to this architecture. This layer is

  infrastructure in the truest sense and therefore rarely maps directly to business requirements. However,

  this layer provides key capabilities that make the architecture service oriented and is the primary focus for

  meeting non-functional requirements such as scalability, reliability, availability, maintainability, etc.

  References:

• Question 82:

  DES, 3DES and AES are types of:

  A. message digest algorithms

  B. symmetric key algorithms

  C. asymmetric key algorithms

  D. SSL identity tokens

  Correct Answer: B

  Explanation: Symmetrickey cryptography uses the same key to encrypt and decrypt data. Therefore the sender and receiver must each have a copy of the key. It is important that no other entity gains access to the key otherwise they would be able to decrypt the data as well. Common key algorithms include the Data Encryption Standard (DES), Triple DES (3DES), and Advanced Encryption Standard (AES).

  References:

• Question 83:

  Which of the following are the three major tiers of the Logical view of the Oracle Management Reference Architecture?

  A. Administrative Tier

  B. Client Tier

  C. Management Tier

  D. Managed Services Tier

  E. Managed Target Tier

  Correct Answer: BCE

  Explanation:

  *

  The Client Tier represents access to management content and operations as well as end users accessing the appropriate business solution. Administrators utilize a browser based console to perform their management tasks using a standard browser interface. The management console which is lightweight, easy to access and firewall friendly, enables administrators to centrally manage their entire environment.

  *

  The Management Tier renders the content and interface for the management console that gives access to management operations such as monitoring, administration, configuration, central policy setting, and security. The Management Tier controls the accessing and uploading of management information.

  *

  The Managed Target Tier contains the named infrastructure components that are required to be managed and monitored. It is common to utilize a combination of agent based and gateway (a.k.a. proxy) patterns to monitor and manage hosted and non-hosted targets.

  

• Question 84:

  Which of the following statements is true with respect to distributed computing?

  A. Distributed computing must be chosen regardless of the functional and nonfunctional requirements of the business.

  B. Distributed computing must be the architecture of choice when the scalability and availability requirements can be best met by further layering the system.

  C. Distributed computing is best suited for building and running monolithic applications.

  D. The objective of distributed computing is to reduce latency.

  Correct Answer: BC

  Explanation: Distributed computing provides a scalable runtime platform capable of handling many concurrent users by allowing related components to be spread out but at the same time enabling them to work in unison. It allows applications to be broken down into smaller, modular components and be deployed across a distributed infrastructure that leverages the power and flexibility of networked servers. Layered architecture enables separation of concern by defining individual logical layers that can be deployed independently, taking advantage of the distributed infrastructure. Distributed architectures allow selective scalability of the layers that require more capacity to handle the load. This allows efficient use of the hardware and software resources and optimization of performance by fine-tuning the appropriate layer or component. In contrast to some of the other models, distributed computing generally is a CAPEX model where the distributed infrastructure is built in-house for applications to be deployed.

  Note: In distributed computing a program is split up into parts that run simultaneously on multiple computers communicating over a network. Distributed computing is a form of parallel computing, but parallel computing is most commonly used to describe program parts running simultaneously on multiple processors in the same computer. Both types of processing require dividing a program into parts that can run simultaneously, but distributed programs often must deal with heterogeneous environments, network links of varying latencies, and unpredictable failures in the network or the computers.

  Note 2: Distributed computing allows multiple, autonomous computers to work in concert to solve a problem or provide a business solution. Distributed computing is used in the vast majority of modern enterprise business solutions.

  References:

• Question 85:

  Which of the following are phases of Service Management?

  A. Monitor

  B. Define

  C. Analyze

  D. Report

  E. Enforce and Execute

  Correct Answer: ABDE

  Explanation:

  There are four Service Management Phases:

  *

  Define

  *

  Enforce and execute

  *

  Monitor

  *

  Report

  References:

• Question 86:

  Which of the following are common management and monitoring standards available today?

  A. Simple Network Management Protocol (SNMP)

  B. Java Management Extensions (JMX)

  C. the Java EE Management specification (JSR 77)

  D. Information Technology Infrastructure Library (ITIL)

  Correct Answer: ABC

  Explanation:

  *

  Simple Network Management Protocol (SNMP) is a well-known and popular protocol for network management.

  *

  Java Management Extensions (JMX) is a specification for monitoring and managing Java resources such as applications, JVM, and J2EE resources.

  *

  The Java EE Management specification (JSR 77) provides a standard model for managing a J2EE Platform and describes a standard data model for monitoring and managing the runtime state of any Java EE Web application server and its resources.

  References:

• Question 87:

  IT Strategies from Oracle (ITSO) includes many Enterprise Solution Designs (ESD). Which statement best describes what an ESD provides to ITSO?

  A. An ESD describes the business processes and data entities that are incorporated into a specific Oracle application.

  B. An ESD detailsindustry-specific business processes that span two or more Oracle applications.

  C. An ESD describes the current state and desired future-state architecture of a typical enterprise in a vertical industry.

  D. An ESD identifies the Oracle applications that are focused on a particular vertical industry.

  Correct Answer: B

  Explanation: ITSO is made up of three primary elementsOracle Reference Architecture (ORA), Enterrprise Technology Strategies (ETS) and Enterprise Solution Designs (ESD). Enterprise Solution Designs (ESD) are industry specific solution perspectives based on ORA. They define the high level business processes and functions, and the software capabilities in an underlying technology infrastructure that are required to build enterprise-wide industry solutions. ESDs also map the relevant application and technology products against solutions to illustrate how capabilities in Oracle's complete integrated stack can best meet the business, technical and quality of service requirements within a particular industry.

  References:

• Question 88:

  Which statement best describes synchronous versus asynchronous communications in a Service Oriented Integration (SOI) architecture?

  A. Both synchronous and asynchronous communication should be supported by SOI. Synchronous communication provides an easier programming paradigm. Asynchronous communication provides greater decoupling between the requester and the responder.

  B. The SOI architecture should use only synchronous communication because SOA Services are inherently synchronous. If a back end system supports only asynchronous communications, the "bridging synchronous and asynchronous communications" integration pattern can be used to convert from asynchronous communication to synchronous communication.

  C. The SOI architecture should use only asynchronous communication because asynchronous communication provides greater decoupling in the architecture. If a back-end system supports only synchronous communications, the "bridging synchronous and asynchronous communications" integration pattern can be used to convert from synchronous communication to asynchronous communication.

  D. The SOA Services in the SOI architecture should use only synchronous communication because SOA Services are inherently synchronous. All communication with back-end system should be asynchronous to decouple the SOA Services from the back-end systems.

  E. The communication within the SOI architecture should be asynchronous and should follow the publishand-subscribe integration pattern. The publish-and-subscribe pattern is the most flexible and provides the greatest decoupling and message throughput.

  Correct Answer: A

  Explanation:

  When using synchronous communication the service consumer blocks until the service provider responds.

  This is usually the easiest type of communication to program in the consumer application. Thus,

  synchronous communication must be supported by the architecture.

  Many applications included in integration scenarios do not provide a synchronous interface. Asynchronous

  communication is also used when the response time for the source system is too slow to support the

  timelines of the calling systems. Thus the architecture must support asynchronous communications.

  References:

• Question 89:

  Which of the following statements describes the relationship between Cloud computing and Grid computing?

  A. Grid computing is the same as Cloud computing

  B. Grid architectures are likely to be used in building Clouds

  C. Grid computing is an evolution of the Cloud computing architecture

  D. Grid computing and Cloud computing are totally unrelated concepts

  Correct Answer: B

  Explanation: The term utility computing is often used to describe the metered (or pay-per-use) IT services enabled by grid computing. Cloudcomputing (where dynamically scalable and often virtualized resources are provided as a service over the internet) is another term that describes how enterprises are using computing resources--on both private and public networks--over the internet. Because grid computing provides superior flexibility, it is the natural architectural foundation for both utility and cloud computing.

  References:

• Question 90:

  Which of the following are architecture principles that pertain to the management and monitoring framework?

  A. focus on individual resources

  B. service aware

  C. standards-based integration

  D. manual governance processes

  E. discoverable

  Correct Answer: BCE

  Explanation:

  The following list is a sample architecture principles that pertain to the management and monitoring

  framework.

  *

  Service Aware (B)

  Treat a Service as a super infrastructure component.

  As more and more enterprises utilize Services as a means to build and compose business solutions it has

  become critical that IT operations have a comprehensive approach to managing and monitoring these

  Services.

  *

  Standards-based Integration (C)

  Standards based approach to integration to interact with internal and external IT operational systems.

  Standards-based integration improves the ability to interoperate with existing but also future and unknown

  IT operational systems. This facilitates the ability to manage and monitor the IT environment holistically as

  well as minimizing the cost of maintaining the integrations.

  *Discoverable (E)

  Discovery of deployed services and infrastructure components. Services and infrastructure components

  have become more dependent on one another, with many of these

  interdependencies crossing corporate boundaries. Without access to information concerning these

  dynamic

  interdependencies diagnosing problems and correlating

  problems in a complex, distributed environment is a huge challenge. Identifying and understanding

  dependencies

  manually is cost prohibitive, and breaks down with rising complexity and a rapid rate of change.

  Note:

  Other architecture principles that apply here as well:

  *Compliant

  *

  Proactive

  *

  Externalize Management

  *

  Manage and Monitor as One

  *

  Extensible

  References: