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Q71. 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 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 RESTRICTED command. 

D. Take the USERDATA tablespace offline in ACCOUNTS_PDB. 

Answer:

Explanation: * 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. 


Q72. You are about to plug a multi-terabyte non-CDB into an existing multitenant container database (CDB). 

The characteristics of the non-CDB are as follows: 

Version: Oracle Database 11g Release 2 (11.2.0.2.0) 64-bit Character set: AL32UTF8 National character set: AL16UTF16 O/S: Oracle Linux 6 64-bit 

The characteristics of the CDB are as follows: 

Version: Oracle Database 12c Release 1 64-bit Character Set: AL32UTF8 National character set: AL16UTF16 O/S: Oracle Linux 6 64-bit 

Which technique should you use to minimize down time while plugging this non-CDB into the CDB? 

A. Transportable database 

B. Transportable tablespace 

C. Data Pump full export/import 

D. The DBMS_PDB package 

E. RMAN 

Answer:

Explanation: * Overview, example: 

-Log into ncdb12c as sys 

-Get the database in a consistent state by shutting it down cleanly. 

-Open the database in read only mode 

-Run DBMS_PDB.DESCRIBE to create an XML file describing the database. 

-Shut down ncdb12c 

-Connect to target CDB (CDB2) 

-Check whether non-cdb (NCDB12c) can be plugged into CDB(CDB2) 

-Plug-in Non-CDB (NCDB12c) as PDB(NCDB12c) into target CDB(CDB2). 

-Access the PDB and run the noncdb_to_pdb.sql script. 

-Open the new PDB in read/write mode. 

* You can easily plug an Oracle Database 12c non-CDB into a CDB. Just create a PDB manifest file for the non-CDB, and then use the manifest file to create a cloned PDB in the CDB. 

* Note that to plugin a non-CDB database into a CDB, the non-CDB database needs to be of version 12c as well. So existing 11g databases will need to be upgraded to 12c before they can be part of a 12c CDB. 


Q73. You are administering a database stored in Automatic Storage Management (ASM). You use RMAN to back up the database and the MD_BACKUP command to back up the ASM metadata regularly. You lost an ASM disk group DG1 due to hardware failure. 

In which three ways can you re-create the lost disk group and restore the data? 

A. Use the MD_RESTORE command to restore metadata for an existing disk group by passing the existing disk group name as an input parameter and use RMAN to restore the data. 

B. Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group and data on the disk group. 

C. Use the MD_RESTORE command to restore the disk group with the changed disk group specification, failure group specification, name, and other attributes and use RMAN to restore the data. 

D. Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group name and same set of disks and failure group configuration, and use RMAN to restore the data. 

E. Use the MD_RESTORE command to restore both the metadata and data for the failed disk group. 

F. Use the MKDG command to add a new disk group DG1 with the same or different specifications for failure group and other attributes and use RMAN to restore the data. 

Answer: A,C,F 

Explanation: AC (not E): 

The md_restore command allows you to restore a disk group from the metadata created by 

the md_backup command. 

md_restore can’t restore data, only metadata. 


Q74. Identify two correct statements about multitenant architectures. 

A. Multitenant architecture can be deployed only in a Real Application Clusters (RAC) configuration. 

B. Multiple pluggable databases (PDBs) share certain multitenant container database (CDB) resources. 

C. Multiple CDBs share certain PDB resources. 

D. Multiple non-RAC CDB instances can mount the same PDB as long as they are on the same server. 

E. Patches are always applied at the CDB level. 

F. A PDB can have a private undo tablespace. 

Answer: B,E 

Explanation: B: Using 12c Resource manager you will be able control CPU, Exadata I/O, sessions and parallel servers. A new 12c CDB Resource Manager Plan will use so-called “Shares” (resource allocations) to specify how CPU is distributed between PDBs. A CDB Resource Manager Plan also can use “utilization limits” to limit the CPU usage for a PDB. With a default directive, you do not need to modify the resource plan for each PDB plug and unplug. 

E: New paradigms for rapid patching and upgrades. 

The investment of time and effort to patch one multitenant container database results in patching all of its many pluggable databases. To patch a single pluggable database, you simply unplug/plug to a multitenant container database at a different Oracle Database software version. 

Incorrect: Not A: 

* The Oracle RAC documentation describes special considerations for a CDB in an Oracle RAC environment. 

* Oracle Multitenant is a new option for Oracle Database 12c Enterprise Edition that helps customers reduce IT costs by simplifying consolidation, provisioning, upgrades, and more. It is supported by a new architecture that allows a container database to hold many pluggable databases. And it fully complements other options, including Oracle Real Application Clusters and Oracle Active Data Guard. An existing database can be simply adopted, with no change, as a pluggable database; and no changes are needed in the other tiers of the application. Not D: You can unplug a PDB from one CDB and plug it into a different CDB without altering your schemas or applications. A PDB can be plugged into only one CDB at a time. 

not F: 

* UNDO tablespace can NOT be local and stays on the CDB level. 

* Redo and undo go hand in hand, and so the CDB as a whole has a single undo tablespace per RAC instance. 


Q75. In your multitenant container database (CDB) with two pluggable database (PDBs). You want to create a new PDB by using SQL Developer. 

Which statement is true? 

A. The CDB must be open. 

B. The CDB must be in the mount stage. 

C. The CDB must be in the nomount stage. 

D. Alt existing PDBs must be closed. 

Answer:

Explanation: 

* Creating a PDB Rather than constructing the data dictionary tables that define an empty PDB from scratch, and then populating its Obj$ and Dependency$ tables, the empty PDB is created when the CDB is created. (Here, we use empty to mean containing no customer-created artifacts.) It is referred to as the seed PDB and has the name PDB$Seed. Every CDB non-negotiably contains a seed PDB; it is non-negotiably always open in read-only mode. This has no conceptual significance; rather, it is just an optimization device. The create PDB operation is implemented as a special case of the clone PDB operation. The size of the seed PDB is only about 1 gigabyte and it takes only a few seconds on a typical machine to copy it. 


Q76. Examine the query and its output: 

SQL> SELECT REASON, metric_value FROM dba_outstanding_alerts; 

REASONMETRIC_VALUE 

Tablespace [TEST] is [28 perce 28.125 nt] full 

Metrics "Current Logons Count"29 

Metrics "Database Time Spent99.0375405 waiting (%)" is at 99.03754 for event class "Application" db_recovery_file_dest_size of97 4294967296 bytes is 97.298 used and has 116228096 remaining bytes available. 

After 30 minutes, you execute the same query: 

SQL> SELECT reason, metric_value FROM dba_outstanding_alerets; 

REASONMETRIC_VALUE 

Tablespace [TEST] is [28 percs 28.125 nt] full 

What might have caused three of the alerts to disappear? 

A. The threshold alerts were cleared and transferred to d0A_alert_history. 

B. An Automatic Workload Repository (AWR) snapshot was taken before the execution of the second 

C. An Automatic Database Diagnostic Monitor (ADOM) report was generated before the execution of the second query. 

D. The database instance was restarted before the execution of the second query. 

Answer:


Q77. 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 disrupt ion to availability is required. 

Which three statements are true about this requirement? 

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. 

Answer: A,C,D 

Explanation: 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: 

Not B, not E: Local and Global indexes can be automatically rebuild with UPDATE 

INDEXES when you move the table. 


Q78. You are about to plug a multi-terabyte non-CDB into an existing multitenant container database (CDB) as a pluggable database (PDB). 

The characteristics of the non-CDB are as follows: 

Version: Oracle Database 12c Releases 1 64-bit Character set: WE8ISO8859P15 National character set: AL16UTF16 O/S: Oracle Linux 6 64-bit 

The characteristics of the CDB are as follows: 

Version: Oracle Database 12c Release 1 64-bit Character set: AL32UTF8 O/S: Oracle Linux 6 64-bit 

Which technique should you use to minimize down time while plugging this non-CDB into the CDB? 

A. Transportable database 

B. Transportable tablespace 

C. Data Pump full export / import 

D. The DBMS_PDB package 

E. RMAN 

Answer: D Explanation: 

Note: 

* Generating a Pluggable Database Manifest File for the Non-CDB 

Execute the dbms_pdb.describe procedure to generate the manifest file. 

exec dbms_pdb.describe(pdb_descr_file=>'/u01/app/oracle/oradata/noncdb/noncdb.xml'); 

Shut down the noncdb instance to prepare to copy the data files in the next section. 

shutdown immediate exit 


Q79. Oracle Grid Infrastructure for a stand-alone server is installed on your production host before installing the Oracle Database server. The database and listener are configured by using Oracle Restart. 

Examine the following command and its output: 

$ crsctl config has 

CRS-4622: Oracle High Availability Services auto start is enabled. 

What does this imply? 

A. When you start an instance on a high with SQL *Plus dependent listeners and ASM disk groups are automatically started. 

B. When a database instance is started by using the SRVCTL utility and listener startup fails, the instance is still started. 

C. When a database is created by using SQL* Plus, it is automatically added to the Oracle Restart configuration. 

D. When you create a database service by modifying the SERVICE_NAMES initialization parameter, it is automatically added to the Oracle Restart configuration. 

Answer:

Explanation: About Startup Dependencies Oracle Restart ensures that Oracle components are started in the proper order, in accordance with component dependencies. For example, if database files are stored in Oracle ASM disk groups, then before starting the database instance, Oracle Restart ensures that the Oracle ASM instance is started and the required disk groups are mounted. Likewise, if a component must be shut down, Oracle Restart ensures that dependent components are cleanly shut down first. Oracle Restart also manages the weak dependency between database instances and the Oracle Net listener (the listener): When a database instance is started, Oracle Restart attempts to start the listener. If the listener startup fails, then the database is still started. If the listener later fails, Oracle Restart does not shut down and restart any database instances. 

http://docs.oracle.com/cd/E16655_01/server.121/e17636/restart.htm#ADMIN12710 


Q80. You install a non-RAC Oracle Database. During Installation, the Oracle Universal Installer (OUI) prompts you to enter the path of the Inventory directory and also to specify an operating system group name. 

Which statement is true? 

A. The ORACLE_BASE base parameter is not set. 

B. The installation is being performed by the root user. 

C. The operating system group that is specified should have the root user as its member. 

D. The operating system group that is specified must have permission to write to the inventory directory. 

Answer:

Explanation: 

Note: 

Providing a UNIX Group Name 

If you are installing a product on a UNIX system, the Installer will also prompt you to provide the name of the group which should own the base directory. 

You must choose a UNIX group name which will have permissions to update, install, and deinstall Oracle software. Members of this group must have write permissions to the base directory chosen. 

Only users who belong to this group are able to install or deinstall software on this machine.