Oracle 1Z0-102 Online Practice Questions and Exam Preparation

Oracle 1Z0-102 Online Questions & Answers

• Question 41:

  You have opened a terminal window (or a Window command prompt) to run a WLST script named weeklydeployer.py. You enter the following command:

  Java weblogic.WLST weeklydeployer.py

  Instead of the WLST initializing and the script running, however, you receive the NoClassDefFoundError java exception for weblogic/WLST.

  What is the problem?

  A. You forgot to set PATH to include the java executable.
  B. There is an error in the code of the script.
  C. You forgot to set CLASSPATH to include weblogic.jar.
  D. You are not in the directory where weeklydeployer.py resides.
  E. You should have omitted the ".py" in the file name; it is assumed by WLST.
  F. You forgot to set PATH to include the WLST executable.
  C. You forgot to set CLASSPATH to include weblogic.jar.

  ---

  To set up your environment for WLST:

  1.

  Install and configure the WebLogic Server software

  2.

  Add WebLogic Server classes to the CLASSPATH environment variable

  Note: Although the process should be able to build the correct classpath by default, you might hit this issue in some cases. To overcome the problem, you must explicitly set the classpath in the admin console accordingly. Reference: WebLogic Scripting Tool, Using the WebLogic Scripting Tool

• Question 42:

  Which three statements are true about WebLogic users and groups?

  A. A user is associated with a single security provider.
  B. A user can be a member of several groups.
  C. A group can contain other groups.
  D. A group consists of a name and a password.
  E. A group is associated with multiple security providers.
  F. Both users and groups are assigned a keystore.
  A. A user is associated with a single security provider.
  B. A user can be a member of several groups.
  C. A group can contain other groups.

  ---

  B: For efficient security management, BEA recommends adding users to groups. A group is a collection of users who usually have something in common, such as working in the same department in a company.

  C: Example of group nesting:

  Every user is a member of the everyone group.

  The users group is nested within the everyone group.

  Note: Security Providers - are modules that provide security service to application to protect Weblogic resource. Types of security providers in WebLogic Server are Authentication Provider, Authorization Provider, Auditing Providers, Credential Mapping Provider, Identity Asser- tion Provider, Principal Validation Provider, Adjudication Providers, Role Mapping Providers, Certificate Lookup and Validation Providers, Keystore Providers and Realm Adapter providers

  Incorrect answers:

  D: There is no password for a group.

  F: A keystore is a mechanism designed to store password-protected store private keys and trusted CA certificates. In the WebLogic Server security architecture, the WebLogic Keystore provider is used to access keystores. You cannot use a custom Keystore provider with WebLogic Server.

  References: Securing WebLogic Resources, Users, Groups, And Security Roles

• Question 43:

  Identify two reasons for defining machines and assigning servers to them in Weblogic Server.

  A. A machine can be the proxy to a cluster.
  B. A machine definition is required to configure the Node Manager.
  C. To reference an instance of WebLogic Server, you must know its machine and port.
  D. Machine is a required organizational unit. A domain contains machines and machines contain servers.
  E. WebLogic Server uses server machine assignments to help it choose servers in a cluster on which to replicate session state.
  F. The machine's Cluster Weight attribute may be used by load balancers to help them determine how often to send requests to servers assigned to that machine.
  B. A machine definition is required to configure the Node Manager.
  E. WebLogic Server uses server machine assignments to help it choose servers in a cluster on which to replicate session state.

  ---

  B: The Administration Server uses the machine definition in conjunction with the Node Manager application to start remote WebLogic Server instances.

  E: By default, WebLogic Server attempts to create session state replicas on a different machine than the one that hosts the primary session state. You can further control where secondary states are placed using replication groups. A

  replication group is a preferred list of clustered servers to be used for storing session state replicas.

  Using the WebLogic Server Console, you can define unique machine names that will host individual server instances. These machine names can be associated with new WebLogic Server instances to identify where the servers reside in your

  system. Machine names are generally used to indicate servers that run on the same machine.

  Reference: Administration Console Online Help, Machines Reference: Failover and Replication in a Cluster

• Question 44:

  Your server includes an application that uses a generic JDBC data source to connect to a database. However, the network connection between the server and the database is not 100% reliable. You wish to avoid scenarios in which the application fails due to a failed JDBC connection. Identify two data source attributes to help accomplish this.

  A. Statement Cache
  B. Pool Reserve Mode
  C. Test Table Name
  D. Test Connection Mode
  E. Test Connections on Reserve
  A. Statement Cache
  E. Test Connections on Reserve

  ---

  A: Each connection in a data source has its own individual cache of prepared and callable statements used on the connection. However, you configure statement cache options per data source. That is, the statement cache for each connection in a data source uses the statement cache options specified for the data source, but each connection caches it's own statements.

  E: When Test Connections On Reserve is enabled, when your application requests a connection from the data source, WebLogic Server tests the connection using the query specified in Test Table Name before giving the connection to the application. Testing reserved connections can cause a delay in satisfying connection requests, but it makes sure that the connection is viable when the application gets the connection.

  Reference: Oracle Fusion Middleware Oracle WebLogic Server Administration Console Online Help 11g Release 1, Configuring JDBC Data Sources http://docs.oracle.com/cd/E12839_01/web.1111/e13737/jdbc_datasources.htm#i1192665

• Question 45:

  View the Exhibit.

  

  You previously deployed an application but later decide to change various configuration parameters, such as timeouts. You access the application's Configuration tab in the console and make your configurations, as shown in the Exhibit. In which file does WebLogic record these modifications?

  A. config.xml
  B. weblogic.xml
  C. Application.xml
  D. Plan.xml
  D. Plan.xml

  ---

  The following attributes are displayed in the exhibit:

  Session Invalidation Interval (in seconds)

  Session Timeout (in seconds)

  debug-enabled

  Maximum in-memory Sessions

  These attributes are stored in the weblogic.xml file as the following elements:

  invalidation-interval-sec

  timeout-secs

  debug-enabled

  max-in-memory-sessions

  Incorrect answers:

  A: config.xml does not contain session related information.

  The config.xml file consists of a series of XML elements. The Domain element is the top-level element, and all elements in the Domain are children of the Domain element. The Domain element includes child elements, such as the Server,

  Cluster, and Application elements. These child elements may have children themselves.

  For example, the Server element includes the child elements WebServer, SSL and Log. The Application element includes the child elements EJBComponent and WebAppComponent. Each element has one or more configurable attributes. An attribute has a corresponding attribute in the configuration API. For example, the Server element has a ListenPort attribute, and likewise, the weblogic.management.configuration.ServerMBean class has a ListenPort attribute.

  Reference: weblogic.xml Deployment Descriptor Elements

• Question 46:

  You use a web browser to log in to a web application that is deployed to WebLogic Server. When you click link named "publish" on the site, an "Access Denied" message appears. Which two statements must be true about this server's security configuration?

  A. The application is not associated with any security roles.
  B. Multiple security realms are active at the same time.
  C. Your user account is a member of a group.
  D. Your user account exists in an authentication provider.
  E. A security policy is attached to the "publish" link URL.
  D. Your user account exists in an authentication provider.
  E. A security policy is attached to the "publish" link URL.

  ---

  D: You were able to log in to the web application that is deployed through WebLogic. In WebLogic Server, Authentication providers are used to prove the identity of users or system processes. This implies that your account exists in an authentication provider.

  E: Extra security is needed to use the publish link. This could be explained by a security policy attached the publish Link URL.

  Reference: Developing Security Providers for WebLogic Server, Authentication Providers

• Question 47:

  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
  A. Configuration Wizard
  C. WLST
  E. Unpack command

  ---

  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 48:

  Your production JMS server and/or its consumers are not able to handle the incoming message workload. The number of messages on the server never stabilizes and the server eventually becomes overload. Which JMS server attribute will best help prevent the JMS server from being overloaded by producers?

  A. Producer Pause High
  B. Messages Threshold High
  C. Reconnect Polity
  D. Paging Directory
  E. Pool Maximum Capacity
  B. Messages Threshold High

  ---

  JMS Configuration option ' Messages Threshold High':

  The upper threshold (number of messages stored in this JMS server) that triggers flow control and logging events. A value of -1 disables the events for this JMS server. If the number of messages exceeds this threshold, the triggered events

  are:

  Log Messages

  -

  A message is logged on the server indicating a high threshold condition. Flow Control

  -

  If flow control is enabled, the JMS server becomes armed and instructs producers to begin decreasing their message flow.

  Reference: Administration Console Online Help, JMS Server: Configuration: Thresholds and Quotas

• Question 49:

  Identify four attributes of a JDBC data source.

  A. URL
  B. Targets
  C. JNDI Name
  D. Delivery Mode
  E. Database Driver
  F. Server Log
  A. URL
  B. Targets
  C. JNDI Name
  E. Database Driver

  ---

  A: When creating a JDBC data source using the Administration Console, you are prompted to select a JDBC driver. The Administration Console provides the driver class name and helps you construct the URL as required by the driver.

  B: JDBC Data Source: Targets. Use this page to select the servers or clusters on which you would like to deploy this JDBC data source.

  C: JNDI Name, The JNDI path to where this data source is bound. By default, the JNDI name is the name of the data source.

  E: When deciding which JDBC driver to use to connect to a database, you should try drivers from various vendors in your environment. In general, JDBC driver performance is dependent on many factors, especially the SQL code used in applications and the JDBC driver implementation.

  Reference: Configuring and Managing WebLogic JDBC, Understanding JDBC Data Sources

• Question 50:

  When a typical application utilizes a JDBC data source, the process involves several steps. Identify three of these steps.

  A. The application returns the connection to the data source.
  B. The application looks up the data source using the JNDI name.
  C. The application tests the connection to verify the database's availability.
  D. The application adds a new connection to the data source if none are available.
  E. The application requests a connection from the data source.
  B. The application looks up the data source using the JNDI name.
  D. The application adds a new connection to the data source if none are available.
  E. The application requests a connection from the data source.

  ---

  Applications look up the data source on the JNDI tree or in the local application context (B) and then reserve a database connection with the getConnection (E) method. Data sources and their connection pools provide connection management processes that help keep your system running and performant.

  B: JNDI Name - Enter the JNDI path to where this JDBC data source will be bound. Applications look up the data source on the JNDI tree by this name when reserving a connection.

  Note: If you've done any work with JDBC DataSources in a Web application, you already understand the basic process: create an initial JNDI (Java Naming and Directory Interface) context, then use the context to perform a "lookup" to retrieve your DataSource.

  Incorrect answers:

  C: The test is optional and if it is executed by weblogic before releasing the connection to the application

  Reference: Administration Console Online Help, Create JDBC data sources http://docs.oracle.com/cd/E15051_01/wls/docs103/ConsoleHelp/taskhelp/jdbc/ jdbc_datasources/ CreateDataSources.html