1Z0-599 Online Practice Questions and Answers

Correct Answer: D

Note:

You can use the 12.1.1 WebLogic Upgrade Wizard to upgrade domains created in WebLogic Server 8.1.

You can also use the WebLogic Upgrade Wizard to upgrade a WebLogic domain created in WebLogic

Server 9.x or 10.x to 12.1.1, but this is optional.

Correct Answer: B

The WebLogic Server-specific deployment descriptor weblogic.xml. If your Web application does not

contain a weblogic.xml deployment descriptor, WebLogic Server automatically selects the default values of

the deployment descriptor elements.

Note:

A Web archive (WAR file) contains the files that make up a Web application. A WAR file is deployed as a

unit on one or more WebLogic Server instances. A WAR file deployed to WebLogic Server always includes

the following files:

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One servlet or Java Server Page (JSP), along with any helper classes.

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An optional web.xml deployment descriptor, which is a Java EE standard XML document that describes the contents of a WAR file.

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A weblogic.xml deployment descriptor, which is an XML document containing WebLogic Server-specific elements for Web applications.

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A WAR file can also include HTML or XML pages and supporting files such as image and multimedia files.

Reference: weblogic.xml Deployment Descriptor Elements

Correct Answer: B

Using FastSwap Deployment to Minimize Redeployment

Java EE 5 introduces the ability to redefine a class at runtime without dropping its ClassLoader or abandoning existing instances. This allows containers to reload altered classes without disturbing running applications, vastly speeding up iterative development cycles and improving the overall development and testing experiences. The usefulness of the Java EE dynamic class redefinition is severely curtailed, however, by the restriction that the shape of the class its declared fields and methods cannot change. The purpose of FastSwap is to remove this restriction in WLS, allowing the dynamic redefinition of classes with new shapes to facilitate iterative development.

With FastSwap, Java classes are redefined in-place without reloading the ClassLoader, thereby having the decided advantage of fast turnaround times. This means that you do not have to wait for an application to redeploy and then navigate back to wherever you were in the Web page flow. Instead, you can make your

changes, auto compile, and then see the effects immediately.

Reference: Using FastSwap Deployment to Minimize Redeployment

Correct Answer: ACE

Use multi-node and clustering to get performance suitable for a product environment.

Correct Answer: CD

C: The saviour of having to type in the username and password each and every time that you start a server. A very useful little file to have, particularly if you have multiple managed servers.

By default, this appears in the Admin Servers security directory ($DOMAIN_HOME/servers/AdminServer/ security) when a domain is created in development mode and is called boot.properties. The file is only created for the admin server, not for any additional servers; simply copying the security directory over is enough. The password is encrypted for the domain, so it can only be used for servers within that domain.

In production mode, the boot.properties file doesn't exist.

D: Development mode enables a WebLogic Server instance to automatically deploy and update applications that are in the domain_name/autodeploy directory (where domain_name is the name of a WebLogic Server domain). Production mode disables the auto-deployment feature and prevents any applications you place in the autodeploy directory after you switch to production mode from being deployed.

Note:

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By default, a WebLogic Server domain runs in development mode.

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You can run a WebLogic Server domain in two different modes: development and production. Only development mode allows you use the auto-deployment feature

Correct Answer: D

WAN HTTP Session State Replication

Resources in a wide area network (WAN) are frequently spread across separate geographical regions. In

addition to requiring network traffic to cross long distances, these resources are often separated by

multiple routers and other network bottle necks. Network communication in a WAN generally has higher

latency and slower interconnect. Slower network performance within a WAN makes it difficult to use a

synchronous replication mechanism like the one used within a MAN. WebLogic Server provides failover

across clusters in WAN by using an asynchronous data replication scheme.

Note:

HTTP Session State Replication

Weblogic Server uses two methods for replicating HTTP session state across clusters:

in-memory replication

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Using in-memory replication, WebLogic Server copies a session state from one server instance to another. The primary server creates a primary session state on the server to which the client first connects, and a secondary replica on another WebLogic Server instance in the cluster. The replica is kept up-to-date so that it may be used if the server that hosts the servlet fails.

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JDBC-based persistence In JDBC-based persistence, WebLogic Server maintains the HTTP session state of a servlet or JSP using file-based or JDBC-based persistence. JDBC-based persistence is also used for HTTP session state replication within a Wide Area Network (WAN).

Correct Answer: CEF

Note:

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Two or more Managed Servers can be configured as a WebLogic Server cluster to increase application scalability and availability. In a WebLogic Server cluster, most resources and services are deployed identically to each Managed Server (as opposed to a single Managed Server), enabling failover and load balancing. A single domain can contain multiple WebLogic Server clusters, as well as multiple Managed

Servers that are not configured as clusters. The key difference between clustered and non-clustered Managed Servers is support for failover and load balancing. These features are available only in a cluster of Managed Servers.

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A WebLogic Server cluster provides these benefits: Scalability The capacity of an application deployed on a WebLogic Server cluster can be increased dynamically to meet demand. You can add server instances to a cluster without interruption of service--the application continues to run without impact to clients and end users. High-Availability In a WebLogic Server cluster, application processing can continue when a server instance fails. You "cluster" application components by deploying them on multiple server instances in the cluster--so, if a server instance on which a component is running fails, another server instance on which that component is deployed can continue application processing.

Correct Answer: ABDE

The following principles encourage RESTful applications to be simple, lightweight, and fast:

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Resource identification through URI

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Uniform interface: Resources are manipulated using a fixed set of four create, read, update, delete operations: PUT, GET, POST, and DELETE. PUT creates a new resource, which can be then deleted by using DELETE. GET retrieves the current state of a resource in some representation. POST transfers a new state onto a resource. See Responding to HTTP Methods and Requests for more information.

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Self-descriptive messages

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Stateful interactions through hyperlinks

Reference: The Java EE 6 Tutorial, What Are RESTful Web Services?

Correct Answer: CE

C:

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A WebLogic Messaging Bridge communicates with the configured source and target bridge destinations. For each mapping of a source destination to a target destination, you must configure a messaging bridge instance. Each messaging bridge instance defines the source and target destination for the mapping, a message filtering selector, a QOS, transaction semantics, and various reconnection parameters.

Note:

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In your JMS Foreign Server configuration:

/ Specify oracle.jms.AQjmsInitialContextFactory as the JNDI Initial Context Factory. / Configure the JDBC

data sources needed for your application environment.

Correct Answer: A