Oracle Oracle Database 1Z0-060 Questions & Answers

• Question 201:

  Examine the following steps of privilege analysis for checking and revoking excessive, unused privileges granted to users:

  1.

  Create a policy to capture the privilege used by a user for privilege analysis.

  2.

  Generate a report with the data captured for a specified privilege capture.

  3.

  Start analyzing the data captured by the policy.

  4.

  Revoke the unused privileges.

  5.

  Compare the used and unused privileges' lists.

  6.

  Stop analyzing the data.

  Identify the correct sequence of steps.

  A. 1, 3, 5, 6, 2, 4

  B. 1, 3, 6, 2, 5, 4

  C. 1, 3, 2, 5, 6, 4

  D. 1, 3, 2, 5, 6, 4

  E. 1, 3, 5, 2, 6, 4

  Correct Answer: B

  1. Create a policy to capture the privilege used by a user for privilege analysis.

  3. Start analyzing the data captured by the policy.

  6. Stop analyzing the data.

  2. Generate a report with the data captured for a specified privilege capture.

  5. Compare the used and unused privileges' lists.

  4. Revoke the unused privileges.

• Question 202:

  Your database is running an ARCHIVELOG mode.

  The following parameters are set in your database instance:

  

  Which statement is true about the archived redo log files?

  A. They are created only in the location specified by the LOG_ARCHIVE_DEST_1 parameter.

  B. They are created only in the Fast Recovery Area because configuring the DB_RECOVERY_FILE_DEST and DB_RECOVERY_FILE_DEST_SIZE parameters automatically enables flashback for the database.

  C. They are created in the location specified by the LOG_ARCHIVE_DEST_1 parameter and in the default location $ORACLE_HOME/dbs/arch.

  D. They are created in the location specified by the LOG_ARCHIVE_DEST_1 parameter and in the location specified by the DB_RECOVERY_FILE_DEST parameter.

  Correct Answer: A

  You can choose to archive redo logs to a single destination or to multiple destinations. Destinations can be local--within the local file system or an Oracle Automatic Storage Management (Oracle ASM) disk group--or remote (on a standby database). When you archive to multiple destinations, a copy of each filled redo log file is written to each destination. These redundant copies help ensure that archived logs are always available in the event of a failure at one of the destinations. To archive to only a single destination, specify that destination using the LOG_ARCHIVE_DEST and LOG_ARCHIVE_DUPLEX_DEST initialization parameters.

  ARCHIVE_DEST initialization parameter. To archive to multiple destinations, you can choose to archive to two or more locations using the LOG_ARCHIVE_DEST_n initialization parameters, or to archive only to a primary and secondary destination using the LOG_ARCHIVE_DEST and LOG_ARCHIVE_DUPLEX_DEST initialization parameters.

• Question 203:

  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?

  A. Enable Memory Access Mode, which reads performance data from SGA.

  B. Use emergency monitoring to fetch data directly from SGA analysis.

  C. Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic Workload Repository (AWR) snapshots.

  D. Use Active Session History (ASH) data and hang analysis in regular performance monitoring.

  E. Run ADDM in diagnostic mode.

  Correct Answer: B

• Question 204:

  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.)

  A. ASM disk groups with ASM disks consisting of Exadata Grid Disks.

  B. ASM disk groups with ASM disks consisting of LUNs on any Storage Area Network array

  C. ASM disk groups with ASM disks consisting of any zero-padded NFS-mounted files

  D. Database files stored in ZFS and accessed using conventional NFS mounts.

  E. Database files stored in ZFS and accessed using the Oracle Direct NFS feature

  F. Database files stored in any file system and accessed using the Oracle Direct NFS feature

  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 205:

  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?

  A. It collects data from SGA and compares it with a preserved snapshot.

  B. It collects data from SGA, analyzes it, and provides a report.

  C. It collects data from SGA and compares it with the latest snapshot.

  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.

• Question 206:

  Which three are true about the large pool for an Oracle database instance that supports shared server connections?

  A. Allocates memory for RMAN backup and restore operations

  B. Allocates memory for shared and private SQL areas

  C. Contains a cursor area for storing runtime information about cursors

  D. Contains stack space

  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 207:

  What are three purposes of the RMAN "FROM" clause?

  A. to support PUSH-based active database duplication

  B. to support synchronization of a standby database with the primary database in a Data environment

  C. to support PULL-based active database duplication

  D. to support file restores over the network in a Data Guard environment

  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 208:

  Which three are direct benefits of the multiprocess, multithreaded architecture of Oracle Database 12c when it is enabled?

  A. Reduced logical I/O

  B. Reduced virtual memory utilization

  C. Improved parallel Execution performance

  D. Improved Serial Execution performance

  E. Reduced physical I/O

  F. Reduced CPU utilization

  Correct Answer: BCF

  * Multiprocess and Multithreaded Oracle Database Systems

  Multiprocess Oracle Database (also called multiuser Oracle Database) uses several processes to run different parts of the Oracle Database code and additional Oracle processes for the users--either one process for each connected user or one or more processes shared by multiple users. Most databases are multiuser because a primary advantage of a database is managing data needed by multiple users simultaneously.

  Each process in a database instance performs a specific job. By dividing the work of the database and applications into several processes, multiple users and applications can connect to an instance simultaneously while the system gives good performance.

  * In previous releases, Oracle processes did not run as threads on UNIX and Linux systems. Starting in Oracle Database 12c, the multithreaded Oracle Database model enables Oracle processes to execute as operating system threads in separate address spaces.

• Question 209:

  In order to exploit some new storage tiers that have been provisioned by a storage administrator, the partitions of a large heap table must be moved to other tablespaces in your Oracle 12c database?

  Both local and global partitioned B-tree Indexes are defined on the table.

  A high volume of transactions access the table during the day and a medium volume of transactions access it at night and during weekends.

  Minimal disruption to availability is required.

  Which three statements are true about this requirement? (Choose three.)

  A. The partitions can be moved online to new tablespaces.

  B. Global indexes must be rebuilt manually after moving the partitions.

  C. The partitions can be compressed in the same tablespaces.

  D. The partitions can be compressed in the new tablespaces.

  E. Local indexes must be rebuilt manually after moving the partitions.

  Correct Answer: ACD

  A: You can create and rebuild indexes online. Therefore, you can update base tables at the same time you are building or rebuilding indexes on that table. You can perform DML operations while the index build is taking place, but DDL operations are not allowed. Parallel execution is not supported when creating or rebuilding an index online.

  D: Moving (Rebuilding) Index-Organized Tables Because index-organized tables are primarily stored in a B-tree index, you can encounter fragmentation as a consequence of incremental updates. However, you can use the ALTER TABLE...MOVE statement to rebuild the index and reduce this fragmentation.

  C: If a table can be compressed in the new tablespace, also it can be compressed in the same tablespace.

  Incorrect Answers:

  B, E: Local and Global indexes can be automatically rebuild with UPDATE INDEXES when you move the

  table.

  References: http://www.oracle.com/technetwork/issue-archive/2014/14-may/o34dba-2193424.html

• Question 210:

  Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database.

  You issue the command to open ACCOUNTS_PDB and find that the USERDATA.DBF data file for the default permanent tablespace USERDATA belonging to ACCOUNTS_PDB is corrupted.

  What should you do before executing the commands to restore and recover the data file in ACCOUNTS_PDB?

  A. Place CDB1 in the mount stage and then take the USERDATA tablespace offline in ACCOUNTS_PDB.

  B. Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.

  C. Issue the ALTER PLUGGABLE DATABASE accounts_pdb OPEN RESTRICTED command.

  D. Take the USERDATA tablespace offline in ACCOUNTS_PDB.

  Correct Answer: D

  * You can take an online tablespace offline so that it is temporarily unavailable for general use. The rest of the database remains open and available for users to access data. Conversely, you can bring an offline tablespace online to make the schema objects within the tablespace available to database users. The database must be open to alter the availability of a tablespace.