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1z0-063 Oracle Database 12c: Advanced Administration Questions and Answers

Questions 4

The CATDB12c database contains an Oracle Database version 12c catalog schema owned by the RC12C user.

The RCAT11 database contains an Oracle Database version 11g catalog schema owned by the RC11 user in which several databases are registered. Both the databases are open.

You execute the RMAN commands:

Which two tasks are performed as part of the import? (Choose two.)

Options:

A.

All databases registered in the RC11 catalog are registered in the RC12C catalog.

B.

Databases from the RC12C catalog are implicitly unregistered if the RC11 catalog has registered databases with same name.

C.

Local and global stored scripts that have the same name as existing scripts in the RC12C catalog are automatically renamed.

D.

Imported databases are unregistered from the RC11 catalog.

E.

Recovery catalog is resynchronized with the control files of the registered databases.

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Questions 5

Examine this command:

Which two statements are true after successful execution? (Choose two.)

Options:

A.

PDB2 will be open read-only.

B.

PDB2 will be in MOUNT state.

C.

A metadata description of PDB2 is stored in an XML file in ‘/disk2/oracle/pdb2/’.

D.

A metadata description of PDB2 is stored in the system tablespace of PDB1.

E.

PDB2 will use shared UNDO.

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Questions 6

You created a tablespace with this statement:

CREATE BIGFILE TABLESPACE adtbs

DATAFILE '/proddb/data/adtbs.dbf' SIZE 10G;

The tablespace is nearly full and you need to avoid any out of space errors for the load of a 5 gig table.

Which two alter statements will achieve this? (Choose two.)

Options:

A.

ALTER TABLESPACE adtbs RESI2E 20G;

B.

ALTER TABLESPACE adtbs ADD DATAFILE;

C.

ALTER TABLESPACE adtbs AUTOEXTEND ON;

D.

ALTER TABLESPACE adtbs ADD DATAFILE '/proddb/data/adtbsl.dbf' SIZE 1QG;

E.

ALTER TABLESPACE adtbs MODIFY DATAFILE '/proddb/data/adtbs.dbf AUTOEXTEND ON;

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Questions 7

Which two statements are true about recovering logically corrupted tables or table partitions from an RMAN backup? (Choose two.)

Options:

A.

Tables or table partitions can be recovered by using an auxiliary instance only.

B.

Tables or table partitions with a foreign key cannot be recovered.

C.

Tables or table partitions can be recovered only when the database is in MOUNT state.

D.

Tables or table partitions from the SYSTEM and SYSAUX tablespaces cannot be recovered.

E.

Tables with NOT NULL constraints cannot be recovered.

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Questions 8

NO: 258

Examine the RMAN commands:

RMAN> CONNECT TARGET “sbu@prod AS SYSBACKUP”;

RMAN> CONNECT AUXILIARY “sbu@dup_db AS SYSBACKUP”;

RMAN> DUPLICATE TARGET DATABASE TO dup_db

FROM ACTIVE DATABASE

PASSWORD FILE

SECTION SIZE 400M;

Which statement is true about the DUPLICATE command?

Options:

A.

It fails because there is no connection to a recovery catalog.

B.

It succeeds only if the target database is in MOUNT state.

C.

It succeeds and creates multisection backup sets that are used for active database duplication.

D.

It fails because no parallel channels are allocated for the auxiliary database.

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Questions 9

Because of logical corruption of data in a table, you want to recover the table from an RMAN backup to a specified point in time.

Examine the steps to recover this table from an RMAN backup:

1. Determine which backup contains the table that needs to be recovered.

2. Issue the RECOVER TABLE RMAN command with an auxiliary destination defined and the point in time specified.

3. Import the Data Pump export dump file into the auxiliary instance.

4. Create a Data Pump export dump file that contains the recovered table on a target database.

Identify the required steps in the correct order.

Options:

A.

1, 4, 3

B.

1, 2

C.

1, 4, 3, 2

D.

1, 2, 4

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Questions 10

You enable Flashback Data Archive for a table for which you want to track and save all transactions for four years. After some time, the requirement changes for keeping transactions from four to two years.

You execute the following command to change the requirement:

SQL> ALTER FLASHBACK ARCHIVE fda1 MODIFY RETENTION 2 YEAR;

What is the outcome?

Options:

A.

An error is returned because the retention period cannot be reduced.

B.

All historical data older than two years, if any, is archived to flashback logs and the flashback archive is set to new retention time.

C.

All historical data older than two years, if any, is purged from the flashback archive FDA1.

D.

All the flashback data archives are purged and the subsequently created flashback archives are maintained for two years.

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Questions 11

Which three statements are true about compression of backup sets? (Choose three.)

Options:

A.

Compressed backups can only be written to media.

B.

Binary compression creates performance overhead during a backup operation.

C.

Unused blocks below the high-water mark are not backed up.

D.

Compressed backups cannot have section size defined during a backup operation.

E.

It works only for locally managed tablespaces.

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Questions 12

You use RMAN with a recovery catalog to back up your database. The backups and the archived redo log files are backed up to media daily. Because of a media failure, the entire database along with the recovery catalog database is lost.

Examine the steps required to recover the database:

1. Restore an autobackup of the server parameter file.

2. Restore the control file.

3. Start up the database instance in NOMOUNT state.

4. Mount the database.

5. Restore the data files.

6. Open the database with the RESETLOGS option.

7. Recover the data files.

8. Set DBID for the database.

Identify the required steps in the correct order.

Options:

A.

1, 8, 3, 2, 4, 5, 7, 6

B.

8, 1, 3, 2, 4, 5, 7, 6

C.

1, 3, 2, 4, 8, 5, 6, 7

D.

8, 3, 2, 4, 5, 7, 6

E.

8, 1, 3, 2, 4, 5, 6

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Questions 13

The following parameters are set for your Oracle 12c database instance:

OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES=FALSE OPTIMIZER_USE_SQL_PLAN_BASELINES=TRUE

You want to manage the SQL plan evolution task manually. Examine the following steps:

1. Set the evolve task parameters.

2. Create the evolve task by using the DBMS_SPM.CREATE_EVOVLE_TASK function.

3. Implement the recommendations in the task by using the DBMS_SPM.IMPLEMENT_EVOLVE_TASK function.

4. Execute the evolve task by using the DBMS_SPM.EXECUTE_EVOLVE_TASK function.

5. Report the task outcome by using the DBMS_SPM.REPORT_EVOLVE_TASK function.

Identify the correct sequence of steps.

Options:

A.

2, 4, 5

B.

2, 1, 4, 3, 5

C.

1, 2, 3, 4, 5

D.

1, 2, 4, 5

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Questions 14

A user issues a query on the sales table and receives the following error:

ERROR at line 1:

ORA-01565: error in identifying file '/u0l/app/oracle/oradata/ORCL/temp01.dbf'

ORA-27037: unable to obtain file status

Which two actions would you take to recover the temporary tablespace? (Choose two.)

Options:

A.

Drop the tenp01.dbf file, and then re-create the temp file.

B.

Add a new temp file to the temporary tablespace and drop the temp01.dbf file.

C.

Shut down the database instance, start up the database instance in mount state, create a new temporary tablespace, and then open the database.

D.

Take the temporary tablespace offline, recover the missing temp file, and then bring the temporary tablespace online.

E.

Create a new temporary tablespace and assign it as the default to the user.

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Questions 15

Examine the backup requirement for your company:

1) Every Sunday, a backup of all used data file blocks is performed.

2) Every Wednesday and Friday, a backup of all the changed blocks since last Sunday's backup is performed.

3) On all the other days, a backup of only the changed blocks since the last day's backup is performed.

Which backup strategy satisfies the requirements?

Options:

A.

level 0 backup on Sunday, cumulative incremental backup on Wednesday and Friday, and differential incremental level 1 backup on all the other days

B.

level 0 backup on Sunday, differential incremental backup on Wednesday and Friday, and cumulative incremental level 1 backup on all the other days

C.

full database backup on Sunday, level 0 backup on Wednesday and Friday, and cumulative incremental level 1 backup on all the other days

D.

full database backup on Sunday, level 0 backup on Wednesday and Friday, and differential incremental level 1 backup on all the other days

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Questions 16

Your database is running in ARCHIVELOG mode and flashback is enabled.

In which scenario must you use RMAN backups for recovering tables and table partitions?

Options:

A.

when recovering a table to a point in time

B.

when recovering a table that has been logically corrupted

C.

when recovering dropped tables that are present in the recyclebin

D.

when recovering the data of a table to the desired point in time, which is more recent than the oldest available undo

E.

when recovering data that was lost after a DDL operation modified the structure of a table

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Questions 17

Which three statements are true about automated maintenance tasks? (Choose three.)

Options:

A.

Predefined maintenance tasks consist of automatic optimizer statistics collection, running Automatic Segment Advisor, and running Automatic SQL Tuning Advisor.

B.

A repository is maintained in the SYSTEM tablespace to store the history of execution of all tasks.

C.

They run at predefined time intervals that are intended to occur during a period of low system loads.

D.

An Oracle Scheduler job is created for each maintenance tasks that is scheduled to run in a maintenance window.

E.

A maintenance window is automatically extended until all the maintenance tasks defined are completed.

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Questions 18

Which three types of backups can be performed for a database running in NOARCHIVELOG mode? (Choose three.)

Options:

A.

consistent whole database backup

B.

backup of noncritical tablespaces without shutting down the instance

C.

backup of the database without shutting down the instance

D.

backup of only those blocks that have changed since the last backup while database is mounted

E.

backup of only the used blocks in a critical tablespace (SYSTEM or SYSAUX) while the database is open

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Questions 19

One of your database suffered an instance failure.

At the next startup, from which point in the redo logs does instance recovery begin?

Options:

A.

from a point corresponding to the most recent successful transaction commit

B.

from a point corresponding to the most recent log instance checkpoint

C.

from a point corresponding to the most recent incremental checkpoint

D.

from a point corresponding to the most recent checkpoint of any kind

E.

from a point corresponding to the most recent log switch checkpoint

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Questions 20

Which three factors influences the optimizer's choice of an execution plan? (Choose three.)

Options:

A.

Cardinality estimates

B.

The OPTIMIZER_MODE initialization parameter

C.

Fixed baselines

D.

Type of connection used to connect to database instance

E.

Object statistics in the data dictionary

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Questions 21

You accidentally drop the CUSTOMERS table, and then recover it by using the FLASHBACK TABLE command.

Which two statements are true about the dependent objects of the CUSTOMERS table? (Choose two.)

Options:

A.

Only the primary key constraint created for the table is flashed back, whereas all other indexes must be retrieved separately.

B.

All the constraints defined on the table, except the referential integrity constraints, are flashed back.

C.

All the triggers associated with the table are flashed back but are disabled.

D.

Materialized views that use the CUSTOMERS table are flashed back.

E.

LOB segments associated with the CUSTOMERS table are flashed back.

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Questions 22

One of your databases supports a data warehousing workload and is in NOARCHIVELOG mode. You perform RMAN level 0 backup on Sundays and level 1 incremental backups on other days.

One data file is corrupt and the current online redo log is missing due to media failure.

Which four actions must you take for recovery? (Choose four.)

Options:

A.

Restore the missing data file.

B.

Recover the database by using RECOVER DATABASE NOREDO;

C.

Recover the database by using RECOVER DATABASE;

D.

Restore the control file.

E.

Open the database by using the RESETLOGS option.

F.

Recover the corrupt file by using RECOVER DATAFILE.

G.

Restore all data files.

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Questions 23

What can be automatically implemented after the SQL Tuning Advisor is run as part of the Automated Maintenance Task?

Options:

A.

statistics recommendations

B.

SQL profile recommendations

C.

SQL statement restructure recommendations

D.

creation of materialized views to improve query performance

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Questions 24

You wish to enable an audit policy for all database users, except sys, system, and scott. You issue the following statements:

SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYS;

SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYSTEM;

SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SCOTT;

For which database users is the audit policy now active?

Options:

A.

all users except sys

B.

all users except scott

C.

all users except sys and scott

D.

all users except sys, system, and scott

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Questions 25

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.)

Options:

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

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Questions 26

Which two statements are true about the Automatic Diagnostic Repository (ADR)? (Choose two.)

Options:

A.

The ADR base is shared across multiple instances.

B.

The ADR base keeps all diagnostic information in binary format.

C.

The ADR can be used to store statspack snapshots to diagnose database performance issues.

D.

The ADR can be used for problem diagnosis even when the database instance is down.

E.

The ADR is used to store Automatic Workload Repository (AWR) snapshots.

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Questions 27

Examine the commands executed in CDB$ROOT of your multitenant container database (CDB) that has multiple pluggable databases (PDB):

Which statement is true about granting the SELECT privilege on the DBA_USERS view to the c##ROLE1 role?

Options:

A.

The command fails and gives an error because object privileges cannot be granted to a common user.

B.

The command fails because CONTAINER is not set to CURRENT.

C.

The command succeeds and the common user C##ADMIN can create a session and query the DBA_USERS view in CDB$ROOT and all the PDBs.

D.

The command succeeds and the common user C##ADMIN can create a session in CDB$ROOT and all the PDBs, but can only query the DBA_USERS view in CDB$ROOT.

E.

The command succeeds and the common user C##ADMIN can create a session and query the DBA_USERS view only in CDB$ROOT.

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Questions 28

Examine the resources consumed by a database instance whose current Resource Manager plan is displayed.

SQL> SELECT name, active_sessions, queue_length,

consumed_cpu_time, cpu_waits, cpu_wait_time

FROM v$rsrc_consumer_group;

Which two statements are true? (Choose two.)

Options:

A.

An attempt to start a new session by a user belonging to DSS_QUERIES fails with an error.

B.

An attempt to start a new session by a user belonging to OTHE_GROUPS fails with an error.

C.

The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the CPU due to resource management.

D.

The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the CPU due to I/O waits and latch or enqueue contention.

E.

A user belonging to the DSS_QUERIES resource consumer group can create a new session but the session will be queued.

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Questions 29

You are administering a multitenant container database (CDB) that contains multiple pluggable databases (PDBs). RMAN is connected to CDB$ROOT.

Examine the command:

RMAN> LIST FAILURE;

Which statement is true about this command?

Options:

A.

It lists failures only for the CDB root database.

B.

It lists failures for a PDB only when RMAN is connected to a recovery catalog.

C.

It lists failures for the CDB and all the PDBs in this CDB.

D.

It lists failures only if RMAN is connected to a PDB.

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Questions 30

You are connected to a pluggable database (PDB) as a common user with the SYSDBA privilege. The PDB is open and you issue the SHUTDOWN IMMEDIATE command.

What is the outcome?

Options:

A.

The PDB is closed and left in the mount state.

B.

The PDB is closed and left in the unmount state.

C.

The command executes only if the common user is granted the SET CONTAINER privilege for the PDB.

D.

The command results in an error because the PDB can be shut down only by a local user.

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Questions 31

Your database supports an OLTP workload. Examine the output of the query:

To ensure faster instance recovery, you set the FAST_START_MTTR_TARGET initialization parameter to 30.

What is the effect of this setting on the database?

Options:

A.

Automatic checkpoint tuning is disabled.

B.

The frequency of log switches is increased.

C.

The overhead on database performance is increased because of frequent writes to disk.

D.

The MTTR advisor is disabled.

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Questions 32

Identify three reasons for using a recovery catalog with Recovery Manager (RMAN). (Choose three.)

Options:

A.

to store backup information of multiple databases in one place

B.

to restrict the amount of space that is used by backups

C.

to maintain a backup for an indefinite period of time by using the KEEP FOREVER clause

D.

to store RMAN scripts that are available to any RMAN client that can connect to target databases registered in the recovery catalog

E.

to automatically delete obsolete backups after a specified period of time

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Questions 33

Your multitenant container database (CDB) CDB1 that is running in ARCHIVELOG mode contains two pluggable databases (PDBs), PDB2_1 and PDB2_2, both of which are open. RMAN is connected to the target pluggable database PDB2_1.

RMAN> BACKUP DATABASE PLUS ARCHIVELOG DELETE INPUT;

Which statement is true about the execution of this command to back up the database?

Options:

A.

All data files belonging to PDB2_1 are backed up and all archive log files are deleted.

B.

All data files belonging to PDB2_1 are backed up along with the archive log files.

C.

Only the data files belonging to pdb2_1 are backed up.

D.

This command gives an error because archive log files can be backed up only when RMAN is connected to the root container database.

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Questions 34

Which two statements are true about Resource Manager plans for individual pluggable databases (PDB plans) in a multitenant container database (CDB)? (Choose two.)

Options:

A.

If no PDB plan is enabled for a pluggable database, all sessions for that PDB are treated to an equal share of resources.

B.

To enable a resource plan for a PDB, a CDB resource plan must be created and enabled.

C.

If a PDB plan is enabled for a pluggable database, Resource Manager uses the resource allocation at the PDB level and ignores the limits set at the CDB level.

D.

If no PDB plan is enabled for a pluggable database, the PDB uses the CDB plan.

E.

If a PDB plan is enabled for a pluggable database, resources are allocated to consumer groups based on the shares provided to the PDB in the CDB plan and the shares provided to the consumer groups in the PDB plan.

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Questions 35

Which three statements correctly describe the relationship amongst jobs, programs, and schedules within the Oracle Job Scheduler? (Choose three.)

Options:

A.

A job is specified as part of a program definition.

B.

A program can be used in the definition of multiple jobs.

C.

A program and job can be specified as part of a schedule definition.

D.

A program and schedule can be specified as part of a job definition.

E.

A program and window can be specified as part of a job definition.

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Questions 36

The HR user updates the salary of one of the employees in the EMPLOYEES table, but does not commit the transaction.

Which type of lock would this scenario lead to?

Options:

A.

Exclusive table-level lock on the EMPLOYEES table

B.

Row-exclusive lock on the row being updated

C.

Null lock on the EMPLOYEES table

D.

Null lock on the row being updated

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Questions 37

Your database is running in ARCHIVELOG mode. Complete database backups are performed daily at midnight. A user accidentally truncates an important table at 10 AM after the last backup. After that, a few important transactions are performed on the database.

Which two best methods for recovering the truncated table data? (Choose two.)

Options:

A.

Table Point-in-Time Recovery

B.

Database Point-in-Time Recovery

C.

Tablespace Point-in-Time Recovery

D.

Flashback Database

E.

Flashback Transaction Backout

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Questions 38

Which two are prerequisites for performing Flashback Transaction? (Choose two.)

Options:

A.

A supplemental log must be enabled for the primary key.

B.

Undo retention guarantee must be configured for the database.

C.

Fast Recovery Area must be enabled for the database.

D.

The EXECUTE privilege must be granted to a user on the DBMS_FLASHBACK package.

E.

Row movement must be enabled.

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Questions 39

Which two statements are true about making RMAN image copies of a database? (Choose two.)

Options:

A.

They can only be written to disk.

B.

They can be made only when the database is running in NOARCHIVELOG mode.

C.

They can be made only when the database is in MOUNT state.

D.

They consist of all used and unused blocks in the data files.

E.

They can be made only when the database is running in ARCHIVELOG mode.

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Questions 40

You have installed two 64G flash devices to support the Database Smart Flash Cache feature on your database server that is running on Oracle Linux.

You have set the db_smart_flash_file parameter:

DB_FLASH_CACHE_FILE= ‘ /dev/f lash_device_1‘,‘ /dev/f lash_device_2‘

How should the D3_flash_cache_size be configured to use both devices?

Options:

A.

Set DB_FLASH_CACHE_SIZE=64G.

B.

Set D3_FLASH_CACHE_SIZE=64G, 64G.

C.

Set D3_FLASK_CACKE_SI2E=128G.

D.

db_flash_cache_SI2E is automatically configured by the instance at startup.

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Questions 41

You wish to create jobs to satisfy these requirements:

1. Automatically bulk load data from a flat file.

2. Rebuild indexes on the SALES table after completion of the bulk load.

How would you create these jobs?

Options:

A.

Create both jobs by using Scheduler raised events.

B.

Create both jobs using application raised events.

C.

Create one job to rebuild indexes using application raised events and another job to perform bulk load using Scheduler raised events.

D.

Create one job to rebuild indexes using Scheduler raised events and another job to perform bulk load by using events raised by the application.

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Exam Code: 1z0-063
Exam Name: Oracle Database 12c: Advanced Administration
Last Update: Nov 21, 2024
Questions: 276