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1z0-133
Oracle WebLogic Server 12c: Administration I Questions and Answers

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Viewing questions 11-20 out of questions

Questions # 11:

You are using the administration console to monitor transactions on a managed server. In the Summary subtab, under the JTA tab, you notice that the total count of transactions does not equal the sum of the committed transactions and all of the various rolled back transaction categories. How do you explain this?

Options:

The total count field includes committed, rolled back, and heuristic completions

The total count field includes in-progress transactions, but the others only show completed transactions

The total count includes distributed and local transactions. The committed count and the various rolled back counts are for distributed transactions only

The total count includes all transactions since the server was started. The other counts only include the transactions included in the latest transaction log

Answer

Explanation

References:

Questions # 12:

You configure a data source with a non XA driver because your (non-Oracle) database does not provide XA drivers.

The data source will sometimes participate in global transactions with an EJB, so as you configure the data source you select “Supports Global Transactions” and One-phase commit.

Why is this configuration wrong?

Options:

You must choose an XA driver when a data source participates in global transactions.

"One' Phase Commit" always returns "ready" during phase one of the two-phase commit process’ so it is possible you will have heuristic errors in the database.

"One-Phase Commit" processes this data source last in the global transactions, if the EJB must go last, you cannot use this configuration.

"One-Phase Commit" only allows this data source to participate in global transaction, so you cannot have a global transaction that includes an EJB.

Answer

Questions # 13:

When creating a dynamic cluster, you have multiple options concerning how dynamic servers are distributed across machines in your domain. Identify three supported configurations. (Choose three.)

Options:

Use a single machine.

Use all machines in a subnet.

Use all machines in the domain.

Use all percentage of machines in the domain.

Use all machines whose names match an expression.

Answer

A, C, E

Questions # 14:

One Managed Server that is part of a large domain throws java.lang.OutOfMemory errors (OOM) occasionally.

You have been monitoring this server with the jvisualVM tool but that didn’t help because the issue occurs infrequently and not a specific scenario. So you decided to force the server to dump the heap memory as soon as an OOM gets thrown in order to analyze the dump file later.

How do you modify the Java HotSpot startup command to enable this feature and save the dump in the directory D:\hprof-dumps\?

Options:

Add -XX:+DumpHeapOnOutOfMemory -XX:DumpPath= D:\hprof-dumps.

Add -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=D:\hprof-dumps.

Add -XX:+DumpHeapOnOutOfMemoryError -XX:HeapPath=D:\hprof-dump.

Add -XX:+HeapDumpOnOutOfMemory -XX:HeapDumpPath=D:\hprof-dumps.

Add -XX:+HeapDumpOnOutOfMemoryError -XX:DumpPath=D:\hprof-dumps.

Add -XX:+HeapDumpOnOutOfMemoryException -XX:HeapDumpPath=D:\hprof-dumps.

Answer

Questions # 15:

Your server includes an application that users a generic JDBC data source to connect to a database. However, the network connection between the server and the database is not 100% reliable.

Identify two data source attributes that, if set properly can help avoid situations in which the application fails due to a failed JDBC connection. (Choose two.)

Options:

Statement Cache Type

Pool Reserve Mode

Test Table Name

Test Connection Mode

Test Connections on Reserve

Answer

C, E

Explanation

References:

Questions # 16:

Which two statements are true about multicast communication within a cluster? (Choose two.)

Options:

Multicast can be used for cluster heartbeat messages.

Multicast is used to replicate session state between servers.

Multiple cluster can share the same multicast address and port.

You may disable multicast on individual cluster members.

Multicast traffic is often limited to a single subnet.

Answer

A, E

Questions # 17:

You create a new dynamic cluster with the following parameters:

Number of servers: 2

Listen port: 8101

Enable calculated listen ports: true

To which two port numbers will the resulting two dynamic servers bind? (Choose two.)

Options:

8101

8102

8103

8100

8104

Answer

A, D

Questions # 18:

You need to scale out an existing domain to include a new machine. You install WebLogic Server on the new machine. Which three steps are required to create the domain directory on the new machine? (Choose three.)

Options:

Use the Configuration Wizard to clone the domain

Run the pack tool on the administration server’s machine

Transfer the installation certificate to the administration server’s machine

Transfer the managed server template to the new machine

Use the Administration Console to clone the administration server

Run the unpack tool on the new machine

Answer

B, D, F

Explanation

References:

Questions # 19:

You need to configure WebLogic Server to satisfy the needs of your new application that will update more than one data set on several databases in the same transaction.

All updates will be committed or rolled back at the end of the transaction.

Which setting should be considered?

Options:

Enable Use XA Data Source Interface in the transaction properties of each data source.

WebLogic Server supports distributed transactions by default, so no specific settings are required.

Split the transaction into multiple local transactions.

Configure your data sources with the available XA-compliant driver for your DBMS.

Enable Two-Phase Commit in each data source.

Answer

Questions # 20:

A web application is configured for in-memory replication and is deployed to a cluster. This cluster is distributed across two buildings on a university campus. For performance reasons, you require that session replication occur within the building whenever possible.

How do you implement this requirement?