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Free Oracle 1Z0-060 Exam Braindumps (page: 5)

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PDF with 216 Questions

You notice that the performance of your production 24/7 Oracle 12c database significantly degraded. Sometimes you are not able to connect to the instance because it hangs. You do not want to restart the database instance.

How can you detect the cause of the degraded performance?

  1. Enable Memory Access Mode, which reads performance data from SG
  2. Use emergency monitoring to fetch data directly from SGA analysis.
  3. Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic Workload Repository (AWR) snapshots.
  4. Use Active Session History (ASH) data and hang analysis in regular performance monitoring.
  5. Run ADDM in diagnostic mode.

Answer(s): B



You plan to use the In-Database Archiving feature of Oracle Database 12c, and store rows that are inactive for over three months, in Hybrid Columnar Compressed (HCC) format.
Which three storage options support the use of HCC? (Choose three.)

  1. ASM disk groups with ASM disks consisting of Exadata Grid Disks.
  2. ASM disk groups with ASM disks consisting of LUNs on any Storage Area Network array
  3. ASM disk groups with ASM disks consisting of any zero-padded NFS-mounted files
  4. Database files stored in ZFS and accessed using conventional NFS mounts.
  5. Database files stored in ZFS and accessed using the Oracle Direct NFS feature
  6. Database files stored in any file system and accessed using the Oracle Direct NFS feature
  7. ASM disk groups with ASM disks consisting of LUNs on Pillar Axiom Storage arrays

Answer(s): A,E,G

Explanation:

HCC requires the use of Oracle Storage – Exadata (A), Pillar Axiom (G) or Sun ZFS Storage Appliance (ZFSSA).

Note:
* Hybrid Columnar Compression, initially only available on Exadata, has been extended to support Pillar Axiom and Sun ZFS Storage Appliance (ZFSSA) storage when used with Oracle Database Enterprise Edition
11.2.0.3 and above
* Oracle offers the ability to manage NFS using a feature called Oracle Direct NFS (dNFS). Oracle Direct NFS implements NFS V3 protocol within the Oracle database kernel itself. Oracle Direct NFS client overcomes many of the challenges associated with using NFS with the Oracle Database with simple configuration, better performance than traditional NFS clients, and offers consistent configuration across platforms.



In your multitenant container database (CDB) containing pluggable databases (PDB), users complain about performance degradation.

How does real-time Automatic Database Diagnostic Monitor (ADDM) check performance degradation and provide solutions?

  1. It collects data from SGA and compares it with a preserved snapshot.
  2. It collects data from SGA, analyzes it, and provides a report.
  3. It collects data from SGA and compares it with the latest snapshot.
  4. It collects data from both SGA and PGA, analyzes it, and provides a report.

Answer(s): B

Explanation:

Note:
* The multitenant architecture enables an Oracle database to function as a multitenant container database (CDB) that includes zero, one, or many customer-created pluggable databases (PDBs). A PDB is a portable collection of schemas, schema objects, and nonschema objects that appears to an Oracle Net client as a non- CDB. All Oracle databases before Oracle Database 12c were non-CDBs.
* The System Global Area (SGA) is a group of shared memory areas that are dedicated to an Oracle “instance” (an instance is your database programs and RAM).
* The PGA (Program or Process Global Area) is a memory area (RAM) that stores data and control information for a single process.



The tnsnames.ora file has an entry for the service alias ORCL as follows:

The TNSPING command executes successfully when tested with ORCL; however, from the same OS user session, you are not able to connect to the database instance with the following command:

SQL > CONNECT scott/tiger@orcl

What could be the reason for this?

  1. The listener is not running on the database node.
  2. The TNS_ADMIN environment variable is set to the wrong value.
  3. The orcl.oracle.com database service is not registered with the listener.
  4. The DEFAULT_DOMAIN parameter is set to the wrong value in the sqlnet.ora file.
  5. The listener is running on a different port.

Answer(s): C

Explanation:

Service registration enables the listener to determine whether a database service and its service handlers are available. A service handler is a dedicated server process or dispatcher that acts as a connection point to a database. During registration, the LREG process provides the listener with the instance name, database service names, and the type and addresses of service handlers. This information enables the listener to start a service handler when a client request arrives.



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