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Oracle 1z0-060 Exam Practice Questions (P. 3)

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Question #11
Which three are true about the large pool for an Oracle database instance that supports shared server connections?
  1. A
    Allocates memory for RMAN backup and restore operations
  2. B
    Allocates memory for shared and private SQL areas
  3. C
    Contains a cursor area for storing runtime information about cursors
  4. D
    Contains stack space
  5. E
    Contains a hash area performing hash joins of tables

Correct Answer:
ABC
The large pool can provide large memory allocations for the following:
/ (B)UGA (User Global Area) for the shared server and the Oracle XA interface (used where transactions interact with multiple databases)
/Message buffers used in the parallel execution of statements
/ (A) Buffers for Recovery Manager (RMAN) I/O slaves
Note:
* large pool
Optional area in the SGA that provides large memory allocations for backup and restore operations, I/O server processes, and session memory for the shared server and Oracle XA.
* Oracle XA
An external interface that allows global transactions to be coordinated by a transaction manager other than Oracle Database.
* UGA
User global area. Session memory that stores session variables, such as logon information, and can also contain the OLAP pool.
* Configuring the Large Pool
Unlike the shared pool, the large pool does not have an LRU list (not D). Oracle Database does not attempt to age objects out of the large pool. Consider configuring a large pool if the database instance uses any of the following Oracle Database features:
* Shared server
In a shared server architecture, the session memory for each client process is included in the shared pool.
* Parallel query
Parallel query uses shared pool memory to cache parallel execution message buffers.
* Recovery Manager
Recovery Manager (RMAN) uses the shared pool to cache I/O buffers during backup and restore operations. For I/O server processes, backup, and restore operations, Oracle Database allocates buffers that are a few hundred kilobytes in size.

Question #12
What are three purposes of the RMAN "FROM" clause?
  1. A
    to support PUSH-based active database duplication
  2. B
    to support synchronization of a standby database with the primary database in a Data environment
  3. C
    to support PULL-based active database duplication
  4. D
    to support file restores over the network in a Data Guard environment
  5. E
    to support file recovery over the network in a Data Guard environment

Correct Answer:
BDE
* With a control file autobackup, RMAN can recover the database even if the current control file, recovery catalog, and server parameter file are inaccessible.
* RMAN uses a recovery catalog to track filenames for all database files in a Data Guard environment. A recovery catalog is a database schema used by RMAN to store metadata about one or more Oracle databases. The catalog also records where the online redo logs, standby redo logs, tempfiles, archived redo logs, backup sets, and image copies are created.

Question #13
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. A
    Enable Memory Access Mode, which reads performance data from SGA.
  2. B
    Use emergency monitoring to fetch data directly from SGA analysis.
  3. C
    Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic Workload Repository (AWR) snapshots.
  4. D
    Use Active Session History (ASH) data and hang analysis in regular performance monitoring.
  5. E
    Run ADDM in diagnostic mode.

Correct Answer:
B

Question #14
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. A
    ASM disk groups with ASM disks consisting of Exadata Grid Disks.
  2. B
    ASM disk groups with ASM disks consisting of LUNs on any Storage Area Network array
  3. C
    ASM disk groups with ASM disks consisting of any zero-padded NFS-mounted files
  4. D
    Database files stored in ZFS and accessed using conventional NFS mounts.
  5. E
    Database files stored in ZFS and accessed using the Oracle Direct NFS feature
  6. F
    Database files stored in any file system and accessed using the Oracle Direct NFS feature
  7. G
    ASM disk groups with ASM disks consisting of LUNs on Pillar Axiom Storage arrays

Correct Answer:
AEG
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.

Question #15
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. A
    It collects data from SGA and compares it with a preserved snapshot.
  2. B
    It collects data from SGA, analyzes it, and provides a report.
  3. C
    It collects data from SGA and compares it with the latest snapshot.
  4. D
    It collects data from both SGA and PGA, analyzes it, and provides a report.

Correct Answer:
B
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.

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