Oracle Oracle Java 1Z0-102 Questions & Answers

• Question 1:

  Which two statements are true about data sources that have been created?

  A. Data sources must be targeted to a server.

  B. Data sources must be bound in the JDNI tree of a server.

  C. Data sources are an Oracle WebLogic Server-specific feature.

  D. Data sources are tied directly to a connection pool.

  E. Data sources are required for a domain.

  Correct Answer: BD

  In WebLogic Server, you configure database connectivity by adding data sources to your WebLogic domain. WebLogic JDBC data sources provide database access and database connection management. Each data source contains a pool of database connections that are created when the data source is created and at server startup. Applications reserve a database connection from the data source by looking up the data source on the JNDI tree or in the local application context and then calling getConnection(). When finished with the connection, the application should call connection.close() as early as possible, which returns the database connection to the pool for other applications to use.

• Question 2:

  Consider the following excerpt from mod_wl_ohs.conf:

  WebLogicCluster 192.168.13.1:7001, 192.168.13.2:7001,192.168.13.2:7001

  SetHandler weblogic-handler

  Assuming that this is a valid is a valid configuration, which two conclusions can you make?

  A. A web application name "welcome" is configured to use session replication.

  B. A web application that uses the paths "welcome" is targeted to the cluster.

  C. The proxy server will ignore any requests that contain the name "welcome."

  D. The proxy server is listening on the host name "welcome."

  E. A cluster exists that consists of at least two managed servers.

  F. All cluster members are running on the same machine.

  Correct Answer: BE

  B: To proxy requests by path, use the Location block and the SetHandler statement. When to use

  Use to apply directives to content that lives outside the filesystem. For content that lives in the filesystem, use and . An exception is , which is an easy way to apply a configuration to the entire server.

  For all origin (non-proxy) requests, the URL to be matched is a URL-path of the form /path/. No scheme, hostname, port, or query string may be included. For proxy requests, the URL to be matched is of the form scheme://servername/path, and you must include the prefix.

  E: Add an IfModule block that defines one of the following:

  For a non-clustered WebLogic Server instance:

  The WebLogicHost and WebLogicPort parameters.

  For a cluster of WebLogic Servers instances:

  The WebLogicCluster parameter.

  If you are proxying requests by MIME type to a cluster of WebLogic Servers, use the WebLogicCluster parameter.

  For example:

  WebLogicCluster

  w1s1.com:7001,w1s2.com:7001,w1s3.com:7001

  Note #1: The ... section is used to mark directives that are conditional on the presence of a specific module. The directives within an

  section are only processed if the test is true. If test is false, everything between the start and end markers is ignored.

  The test in the section directive can be one of two forms:

  module name

  !module name

  Note #2:

  Directive

  Description: Applies the enclosed directives only to matching URLs Syntax: ...

  Context: server config, virtual host

  Status: Core

  Module: core

  The directive limits the scope of the enclosed directives by URL. It is similar to the directive, and starts a subsection which is terminated

  with a directive. sections are processed in the order they appear in the configuration file, after the sections and .htaccess files

  are read, and after the sections.

  sections operate completely outside the filesystem. This has several consequences. Most importantly, directives should not be used to

  control access to filesystem locations. Since several different URLs may map to the same filesystem location, such access controls may by circumvented.

  Reference: eDocs Home > BEA WebLogic Server 8.1 Documentation > Using Web Server Plug- Ins with WebLogic Server > Installing and Configuring the Apache HTTP Server Plug-In

• Question 3:

  You are installing Oracle WebLogic Server 11g for some new developers in the department. They have asked for a very generic installation for development and want you to ensure that the "MedRec" sample domain is included. What should you do to accomplish this?

  A. Select the typical installation because the "MedRec" sample domain is included in it.

  B. You won't be able to do this, because all the samples were removed from the installer after 10g.

  C. Select the custom installation and select Server Examples.

  D. After installation, create a sample domain named "MedRec" by using the Configuration Wizard.

  Correct Answer: C

  MedRec-Spring is not installed by default when you install WebLogic Server. You must choose Custom installation, then select Server Examples from the Choose Products and Component page.

  Note: MedRec is an end-to-end sample Java EE application shipped with WebLogic Server that simulates an independent, centralized medical record management system. The MedRec application provides a framework for patients, doctors, and administrators to manage patient data using a variety of different clients.

  MedRec demonstrates WebLogic Server and Java EE features, and highlights Oracle- recommended best practices. MedRec is included in the WebLogic Server distribution, and can be accessed from the Start menu on Windows machines. For Linux and other platforms, you can start MedRec from the WL_HOME\samples \domains\medrec directory, where WL_HOME is the top-level installation directory for WebLogic Server. A Spring version of the application is accessible from the WL_HOME\samples\domains\medrec-spring directory.

  Reference: Oracle Fusion Middleware Spring Support in Oracle WebLogic Server 11g Developing Spring-Based Applications for Oracle WebLogic Server

• Question 4:

  When describing a WebLogic domain, which three statements are true?

  A. A domain may be set up in either Production Mode Production Mode or Development Mode.

  B. All instances of WebLogic Server must be defined within a domain.

  C. The domain configuration is stored in Oracle database by default.

  D. Any instance of WebLogic Server may update the domain configuration

  E. The security realm for a domain is optional.

  F. A domain maybe created by using the Configuration Wizard.

  Correct Answer: ABF

  A: All servers in a domain run either in development mode or production mode.

  F: If you want to create a new domain, you can use the Configuration Wizard (or WLST or Unpack command).

  Incorrect answers:

  D: Only an administration server can update the domain configuration.

• Question 5:

  You are responsible for configuration a WebLogic domain to support an order processing application. This application will communicate with multiple JDBC data sources to fulfill each customer order. To maintain data integrity across these databases, work will be performed within a global transaction.

  However, you have learned that one of the data sources in the transaction does not have an XA driver. Which option should you select on this non-XA data source to ensure that orders are still processed as global transactions?

  A. Ignore Heuristics

  B. Planned to Thread

  C. Password Encrypted

  D. Logging Last Resource

  E. Test Connections on Reserve

  Correct Answer: D

  The Logging Last Resource option:

  Enables a non-XA JDBC connection to participate in distributed transactions using the Logging Last Resource (LLR) transaction optimization. Recommended in

  place of Emulate Two-Phase Commit.

  With this option, the transaction branch in which the connection is used is processed as the last resource in the transaction and is processed as a one-phase

  commit operation. The result of the operation is written in a log file on the resource itself, and the result determines the success or failure of the prepare phase of

  the transaction. This option offers some performance benefits with greater data safety than Emulate Two-Phase Commit.

  Note: The transaction protocol for a JDBC data source determines how connections from the data source are handled during transaction processing. Transactions

  within a JDBC data source are either global (XA) and non-global (local).

  Incorrect answers:

  E: Test Connections on Reserve is related to connections, not to transactions:

  When Test Connections on Reserve is enabled, the server instance checks a database connection prior to returning the connection to a client. This helps reduce

  the risk of passing invalid connections to clients.

  Reference: OTN Home > Oracle WebLogic Server 10.3.1 Documentation > Administration Console Online Help > JDBC Data Source: Configuration: Transaction

• Question 6:

  Which four tasks are required to use database persistence for JMS messages?

  A. Assign a data source to a JDBC store.

  B. Configure a data source's delivery mode.

  C. Assign a JDBC store to a JMS server.

  D. Create a JDBC data source.

  E. Disable a server's file store.

  F. Create a JDBC store.

  Correct Answer: ACDF

  The main steps for creating a JDBC store are as follows:

  1.

  Create a JDBC data source (D) or multi data source to interface with the JDBC store.

  2.

  Create a JDBC store (F) and associate it with the JDBC data source (A) or multi data source.

  3.

  It is highly recommended that you configure the Prefix option to a unique value for each configured JDBC store table.

  4.

  Associate the JDBC store with the subsystem(s) that will be using it, such as:

  *

  For JMS servers, select the JDBC store (C) on the General Configuration page.

  *

  For Store-and-Forward agents, select the JDBC store on the General Configuration page.

  Note: The WebLogic Persistent Store provides a built-in, high-performance storage solution for all subsystems and services that require persistence. For example, it can store persistent JMS messages or temporarily store messages sent using the Store-and-Forward feature. Each WebLogic Server instance in a domain has a default persistent store that requires no configuration and which can be simultaneously used by subsystems that prefer to use the system's default storage. However, you can also configure a dedicated file-based store or JDBC database-accessible store to suit your JMS implementation.

  Reference: Documentation Home > BEA WebLogic Server 9.2 Documentation > Configuring WebLogic Server Environments > Using the WebLogic Persistent Store, Main Steps for Configuring a JDBC Store

• Question 7:

  Indentify two server attributes that you must configure to communicate with the server via HTTPS.

  A. SSL Listen Address

  B. SSL Listen Port

  C. SSL Listen Port Enabled

  D. Production Mode Enabled

  E. Startup Mode

  Correct Answer: BC

  B: WebLogic Server supports SSL on a dedicated listen port which defaults to 7002. To establish an SSL connection, a Web browser connects to WebLogic Server by supplying the SSL listen port and the HTTPs schema in the connection URL, for example, https://myserver:7002.

  C: Note: Enabling SSL under WLS 10.3

  Steps to configure WLS for SSL:

  1) Open the WLS console

  2) Select from the Domain Structure -> (your domain) -> Environment -> Servers

  3) Select the server from the Summary of Servers page you wish to configure for SSL.

  4) Under the Settings for (server name) page, select the Configuration tab, then General tab (the defaults).

  5) If WLS is running in production mode, select the Lock and Edit button.

  6) Select the SSL Listen Port Enabled checkbox, and enter your preferred port in the SSL Listen Port.

  7) Press the Save button.

  8) If WLS is running in production mode, select the Release Configuration button.

  Incorrect answers:

  A: There is no such thing as SSL Listen address. Using a sloppy language it can be used as a synonym to SSL Listen Port. SSL Listen port do exist.

  Reference: Oracle HTTP Server Attribute Descriptions

• Question 8:

  Consider a cluster of four servers: ServerA, ServerB, ServerC, and ServerD. The cluster hosts a web application and is accessed using a proxy pug-in. This web application is configured to use in-memory session replication.

  A user is directed to ServerA. An HTTP session is established on ServerA and is also replicated to ServerC. If ServerA subsequently fails, which server will this user be redirected to?

  A. none; the user will receive an error message

  B. ServerB

  C. ServerC

  D. ServerD

  E. Any other available server

  Correct Answer: C

  To support automatic failover for servlet and JSP HTTP session states, WebLogic Server replicates the session state in memory. WebLogic 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. The process of copying a session state from one server instance to another is called in-memory replication.

• Question 9:

  Which three techniques can create a new WebLogic domain?

  A. Configuration Wizard

  B. Domain Template Builder

  C. WLST

  D. Administration console

  E. Unpack command

  F. Node Manager

  Correct Answer: ACE

  A, C: WLST enables you to create a new domain or update an existing domain without connecting to a running WebLogic Server (that is, using WLST offline)-supporting the same functionality as the Configuration Wizard.

  Incorrect answers:

  If a domain's Administration Server is running, you can use the Administration

  D:

  Console to add and remove servers in the domain and to configure all of the domain's properties. In addition, you can use the Administration Console to monitor

  the performance and overall health of a domain.

  If you want to create a new domain, use the Configuration Wizard

  E: Create a template that defines the full set of resources within a domain, including infrastructure components, applications, services, security options, and

  general environment and operating system parameters.

  You can the template that you create, as the basis for creating a domain by using the Configuration Wizard, WLST, or the unpack command.

• Question 10:

  Which four statements are true about WLST?

  A. You can create a domain with WLST.

  B. WLST commands are case-insensitive.

  C. You can shut down servers with WLST.

  D. All WLST commands include parentheses.

  E. WLST is based on the Perl scripting language.

  F. You can connect to any server through WLST.

  G. The Administration Server needs to be running to use WLST.

  Correct Answer: ABCD

  A: WLST enables you to create a new domain or update an existing domain without connecting to a running WebLogic Server (that is, using WLST offline)-supporting the same functionality as the Configuration Wizard.

  B: WLST command names and arguments are case sensitive.

  C: The WLST shutdown command Gracefully shuts down a running server instance or a cluster. The shutdown command waits for all the in-process work to be completed before shutting down the server or cluster.

  You shut down a server to which WLST is connected by entering the shutdown command without any arguments.

  D: All WLST commands include parentheses. Example: exit(),startApplication(appName, [options])

  Incorrect answers:

  E: WLST is based on the Java scripting interpreter, Jython.

  F: The WLST connect command only to a WebLogic Server instance.

  G: Without connecting to a running WebLogic Server instance, you can use WLST to create domain templates, create a new domain based on existing templates, or extend an existing, inactive domain. You cannot use WLST offline to view performance data about resources in a domain or modify security data (such as adding or removing users).

  WLST offline provides read and write access to the configuration data that is persisted in the domain's config directory or in a domain template JAR created using Template Builder.

  Reference: Documentation Home > BEA WebLogic Server 9.2 Documentation > WebLogic Scripting Tool > WLST Command and Variable Reference