How to Pass the Oracle 1z0-599 Exam: Comprehensive Oracle WebLogic Server 12c Essentials Guide and Tips

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

* Resource identification through URI

* 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.

* Self-descriptive messages

* Stateful interactions through hyperlinks

Note:

* Apache Maven is a software tool for building and managing Java-based projects. WebLogic Server provides support for Maven through the provisioning of plug-ins that enable you to perform various operations on WebLogic Server from within a Maven environment.

* Continuous Integration is a software engineering practice which attempts to improve quality and reduce time to deliver software by applying small, frequent quality control efforts. It is characterized by these key practices:

Use of a version control system

All developers commit to the ‘HEAD’ (main code line) every day

The product is built on every commit

The build must be automated and fast

Automated deployment to a production-like environment

Automated testing

Results of all builds are published (so everyone can see who broke the build)

Deliverables are easily available (for developers, testers, other stakeholders)

* WebLogic Server supports Fast Connection Failover, a Oracle feature which provides an application independent method to implement RAC event notifications, such a detection and cleanup of invalid connections, load balancing of available connections, and work redistribution on active RAC instances.

* A GridLink data source uses Fast Connection Failover and responds to Oracle RAC

events using ONS. This ensures that the connection pool in the GridLink data source

contains valid connections (including reserved connections) without the need to poll

and test connections

Note:

* 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.

* 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.

You can configure a JDBC TLOG store to persist transaction logs to a database, which provides the following benefits:

* Leverages replication and HA characteristics of the underlying database.

* Simplifies disaster recovery by allowing the easy synchronization of the state of the database and TLOGs.

* Improved Transaction Recovery service migration as the transaction logs to do not need to be migrated (copied) to a new location.

* You can configure a JDBC TLOG store to persist transaction logs to a database, which allows you to leverage replication and HA characteristics of the underlying database, simplify disaster recovery, and improve Transaction Recovery service migration.

incorrect:

not B: Read-only, One-phase Commit Optimization requires Oracle DB 11.1.0.7.3PSU or above.

Note:

* In managing multiple servers, Node Manager uses multiple configuration files and outputs log files to multiple directories.

* nodemanager.domains

This file contains mappings between the names of domains managed by Node Manager and their corresponding directories.

* Node Manager in the WebLogic Server Environment

Reference; Node Manager Administrator's Guide for Oracle WebLogic Server 12c

Incorrect:

Not A: New or enhanced WebLogic 12c features include

JAVA EE 6 support all kinds of JEE6 specifications

Not C: 12c do include a new Maven plug-in

Not D: For 1.6 adapters, you can embed metadata annotations in the resource adapter class files to specify deployment information, eliminating the need to create the ra.xml file manually.