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Oracle IT Architecture Essentials

Question No: 91

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

  1. Simple Network Management Protocol (SNMP)

  2. Java Management Extensions (JMX)

  3. the Java EE Management specification (JSR 77)

  4. Information Technology Infrastructure Library (ITIL)

Answer: A,B,C

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.

    Reference: Oracle Reference Architecture, Management and Monitoring, Release 3.0

    Question No: 92

    Which of the following are phases of Service Management?

    1. Monitor

    2. Define

    3. Analyze

    4. Report

    5. Enforce and Execute

    Answer: A,B,D,E

    Explanation: There are four Service Management Phases:

  • Define

  • Enforce and execute

  • Monitor

  • Report

Reference: Oracle Reference Architecture, Management and Monitoring, Release 3.0

Question No: 93

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

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

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

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

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

Answer: B,C

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.

Reference: Oracle Reference Architecture, Application Infrastructure Foundation, Release 3.0

Question No: 94

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

  1. Administrative Tier

  2. Client Tier

  3. Management Tier

  4. Managed Services Tier

  5. Managed Target Tier

Answer: B,C,E

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.

Dumps4Cert 2018 PDF and VCE

Reference: Oracle Reference Architecture,Management and Monitoring, Release 3.0

Question No: 95

DES, 3DES and AES are types of:

  1. message digest algorithms

  2. symmetric key algorithms

  3. asymmetric key algorithms

  4. SSL identity tokens

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).

Reference: Oracle Reference Architecture,Security, Release 3.1

Question No: 96

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?

  1. 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.

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

  3. 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.

  4. 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.

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.

Reference: Oracle Reference Architecture, Service-Oriented Integration, Release 3.0

Question No: 97

Which of the following statements are true about applying security to SOA Services?

  1. SOA Services must base access control decisions on roles, attributes, rules, and so on, that are universal to all consumers.

  2. SOA Services are difficult to secure due to a lack of security standards for Web Services.

  3. SOA Services are a type of monolithic application with self-contained identity and role management.

  4. Data returned by a SOA Service may need to be redacted according to data classification schemes, depending on the privileges of users.

Answer: A,D

Explanation: A: In terms of access control, SOA Services must base access control decisions on roles, attributes, rules, etc. that are universal to all consumers.

D: data provided by a SOA Service must adhere to data classification restrictions that might differ between consumers. For instance, the same query

service may need to redact various rows or columns of data based on restrictions assigned to classes of consumers.

Reference: Oracle Reference Architecture,Security, Release 3.1

Question No: 98

Which statement best describes the relationship between the Logical View and the Development view of the Service-Oriented Integration architecture?

  1. The two architectural views are Independent and there is no relationship between them.

  2. The Logical View defines the rationale for layers within the architecture. The Development View specifies the developer tools used for each layer.

  3. The Logical View defines the layers of the architecture and the capabilities within each layer. The Development View describes how aspects of the architecture impact developers following the architecture.

  4. The Logical View defines the layers of the architecture and the capabilities within each layer. The Development View specifies the developer tools that provide the capabilities for each layer.

  5. The Logical View specifies the developer tools required by each layer in the architecture. The Development View describes the developer impact of the tools specified.

Answer: C

Explanation: * The Logical View of the architecture describes the various layers in the architecture.

Each layer encapsulates specific capabilities for the overall architecture. Upper layers in the architecture leverage the capabilities provided by the lower layers.

*The Development View of the architecture describes aspects of the architecture that are of interest to developers building assets that conform to and leverage the architecture.

In a service-oriented integration architecture the primary developer artifacts are the SOA Services that are created to expose data and functionality contained in source systems.

Reference: Oracle Reference Architecture, Service-Oriented Integration, Release 3.0

Question No: 99

Service composition is the creating of a new SOA Service by aggregating existing SOA Services. Which statements are correct concerning the use of service composition within the Service-Oriented Integration architecture?

  1. The SOI architecture is a layered architecture; therefore service composition is not allowed.

  2. Service composition is allowed, even encouraged, by the SOI architecture.

  3. Service composition within the SOI architecture is allowed only when the aggregation is over SOA Services from lower layers in the architecture.

  4. Service composition should be avoided because service aggregation is provided by the Mediation Layer.

  5. Service composition is allowed, but is discouraged because service composition leads to complex dependencies.

Answer: C

Explanation: Service composition is the ability to leverage lower-level services to create a higher-level service

When doing composition, the developer should respect the layering of the

architecture. Thus, a Business Service could leverage existing Connectivity Services or Data Services and a Data Service could leverage existing Connectivity Services. But, a Data Service should not call a Business Service and a Connectivity Service should not call a Data Service or a Business Service

Reference: Oracle Reference Architecture, Service-Oriented Integration, Release 3.0

Question No: 100

Choose the three statements from the following list that accurately reflect architectural principles of Oracle Reference Architecture User Interaction.

  1. The architecture must support separating configuration and other types of metadata from the source code.

  2. The architecture must support orchestration of business application functions.

  3. The architecture must support end-user access to a wide variety of server-side functionality.

  4. The architecture must not attempt to replicate the capabilities of traditional client-server GUIs.

  5. The architecture must provide secure interaction between the end user and the server- side resources.

  6. The architecture must provide the end user with the capability to switch quickly between applications.

Answer: A,C,E

Explanation: * Meta-data support

The architecture must support separating configuration and other types of meta-data from the source code.

*Access to Functionality

The architecture must support end user access to a wide variety of server-side functionality.

*Secure Interactions

The architecture must provide secure interaction between the end user and the server-side resources.

Reference: Oracle Reference Architecture, User Interaction, Release 3.0

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