Which two are true about gathering optimizer statistics? (Choose two.)
AExecuting DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open PDBs except PDB$SEED.
BExecuting DBMS_STATS.GATHER_DATABASE_STATS while connected to a PDB opened in read/write mode gathers object statistics for that PDB.
CExecuting DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics only in CDB$ROOT.
DSystem statistics can be gathered only while connected to CDB$ROOT.
EExecuting DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open pluggable databases (PDBs)
Examine these queries and their output:
After a system crash, an instance restart and an attempted opening of the PDBs result in:
Which two are true? (Choose two.)
AData file 24 can be recovered while PDB2 is opened.
BData file 24 must be recovered while the CDB is opened.
CData file 24 can be recovered while CDB$ROOT and PDB$SEED are opened.
DData file 24 cannot be recovered while the CDB is opened.
EData file 24 must be recovered while PDB2 is closed.
Which two are true about Oracle Flashback features? (Choose two.)
AFLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
BFLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
CFLASHBACK TABLE can undrop a column.
DFLASHBACK DROP can undrop an index when undropping a table.
EAfter a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.
Which three are true about requirements for various FLASHBACK operations? (Choose three.)
AFLASHBACK transaction query requires undo to retrieve all versions of a row that existed between two points in time.
BFLASHBACK drop requires that the RECYCLEBIN parameter be set to ON.
CFLASHBACK version query requires that the RECYCLEBIN parameter be set to ON.
DFLASHBACK DATA ARCHIVE requires undo to store all versions of all rows of a table being tracked.
EFLASHBACK drop requires undo to retrieve all versions of a row that existed between two points in time.
FFLASHBACK version query requires undo to retrieve all versions of a row that existed between two points in time.
For which two requirements can you use the USER_TABLESPACE clause with the CREATE PLUGGABLE DATABASE command? (Choose two.)
Ato specify a default tablespace in a PDB cloned from another PDB in the same CDB.
Bto exclude all tablespaces except SYSTEM, SYSAUX, and TEMP when plugging in a PDB
Cto include specific user tablespaces only when relocating a PDB
Dto specify the list of user tablespaces to include when moving a non-CDB to a PDB
Eto exclude a temp tablespace when plugging in a PDB
Fto specify the list of tablespaces to include when creating a PDB from the CDB seed
While backing up to an SBT channel, you determine that the read phase of your compressed Recovery Manager (RMAN) incremental level 0 backup is a bottleneck.
FORCE LOGGING is enabled for the database.
Which two could improve read performance? (Choose two.)
AIncrease the size of tape I/O buffers.
BDisable FORCE LOGGING for the database.
CIncrease the size of the database buffer cache.
DEnable asynchronous disk I/O.
EIncrease the level of RMAN multiplexing.
Which three are true about thresholds, metrics, and server-generated alerts? (Choose three.)
AAll metrics are instance related.
BCleared stateful alerts are displayed by querying DBA_ALERT_HISTORY.
CA space usage management alert is automatically cleared after the underlying problem is resolved.
DThey are generated by SMON when a tablespace is 97% full.
EMetrics are statistical counts for a specific unit.
FSTATISTICS_LEVEL must be set to ALL to generate alerts.
Which three actions are performed by the Oracle Preinstallation RPM, oracle-database-server-xxxx-preinstall, for Oracle Grid Infrastructure, where xxxx is the Oracle version and release? (Choose three.)
Aperforming checks to ensure minimum configuration requirements for Oracle Grid Infrastructure are met
Bcreating the oracle OS user
Ccreating the OSDBA (dba) group
Dcreating the oraInventory (oinstall) group
Ecreating the grid OS user
Fconfiguring the OS for Oracle Automatic Storage Management shared storage access
Which two are true about common objects? (Choose two.)
AThey can be created only in CDB$ROOT.
BThey can be only metadata-linked in an application container.
CThey can exist in user-defined schemas only in application containers.
DThey can exist in CDB$ROOT and an application root.
EThey can be extended data-linked in CDB$ROOT.
FThey can be created only in an application root.
Which two are true about the Automatic Database Diagnostic Monitor (ADDM)? (Choose two.)
AIt analyzes a period of time corresponding to the 12 hours of activity.
BIt runs automatically after each AWR snapshot.
CA DBA can run it manually.
DResults are written to the alert log.
EIt analyzes a period of time corresponding to the last day of activity.
Which two are true about the character sets used in an Oracle database? (Choose two.)
ASingle-byte character sets provide better performance than multibyte character sets.
BUnicode enables information from any language to be stored using a single character set.
CUnicode is the only supported character set for Oracle databases created using Database Configuration Assistant (DBCA).
DSingle-byte character sets always use 7-bit encoding schemes.
EMultibyte character sets allow more efficient space utilization than single byte character sets.
FSingle-byte character sets always use 8-bit encoding schemes.
Which four are true about duplicating a database using Recovery Manager (RMAN)? (Choose four.)
ADuplication can be done by having the auxiliary database instance pull backup sets from the target database instance.
BA connection to an auxiliary instance is always required.
CA subset of the target database can be duplicated.
DA new DBID is always created for the duplicated database.
EA connection to the recovery catalog instance is always required.
FA backup of the target database is always required.
A user complains about poor database performance.
You want to verify if the user's session has waited for certain types of I/O activity.
Which view displays all waits waited on by a session at least once?
AV$SESSION_EVENT
BV$SESSTAT
CV$SESSION_WAIT
DV$SESSION_WAIT_CLASS
EV$SESSION
You must transport the UNIVERSITY tablespace from one database to another.
The UNIVERSITY tablespace is currently open read/write.
The source and destination platforms have different endian formats.
Examine this list of actions:
Make the UNIVERSITY tablespace read-only on the source system.
Export the UNIVERSITY tablespace metadata using EXPDP.
Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the source system.
Copy the UNIVERSITY tablespace data files to the destination system.
Copy the Data Pump dump set to the destination system.
Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the destination system.
Import the UNIVERSITY tablespace metadata using IMPDP.
Make the UNIVERSITY tablespace read/write on the destination system.
Which is the minimum number of actions required, in the correct order, to transport the UNIVERSITY tablespace?
A1, 2, 4, 5, 7, 8
B1, 2, 4, 6, 7, 8
C1, 2, 3, 4, 5, 7, 8
D1, 2, 3, 4, 5, 6, 7, 8
E2, 4, 5, 6, 7
Which three are true about Optimizer Statistics Advisor? (Choose three.)
AIt can be run only manually.
BIt is part of the DBMS_ADVISOR package.
CIt can recommend changes to improve the statistics gathering process.
DIt always analyzes all schemas in the database.
EIt runs automatically every night by default.
FIt is part of the DBMS_STATS package.
Which three are true about monitoring waits for sessions and services? (Choose three.)
AV$SESSION_EVENT displays all waits for all past and existing sessions if the wait has occurred at least once for a session.
BV$SERVICE_EVENT displays all waits for all services if the wait has occurred at least once for a service.
CV$SESSION_WAIT_CLASS displays waits broken down by wait class only for waiting sessions.
DV$SESSION_WAIT and V$SESSION both contain details of the event on which a non-waiting session last waited.
EV$SESSION_EVENT displays all waits for all past sessions if the wait has occurred at least once for a session.
FV$SESSION_WAIT and V$SESSION both contain details of the event on which a session is currently waiting.
Which three are true about transporting databases across platforms using Recovery Manager (RMAN) image copies? (Choose three.)
ABy default, the transported database will use Oracle Managed Files (OMF)
BData files can be converted on the destination system.
CData files can be converted on the source system.
DA new DBID is automatically created for the transported database.
EDatabases can be transported between systems with different endian formats.
FThe password file is automatically converted by RMAN.
Which three are true about opatchauto? (Choose three.)
AIt performs a shutdown and then a restart of all processes in both Oracle Grid Infrastructure and Oracle Database home during the patching process.
BIt must be invoked by a user with root user privileges.
CPatches are applied via opatchauto.
DUsers must always input patch plans to opatchauto.
EIt requires the Oracle Grid Infrastructure and Oracle Database instances to be shut down before being invoked.
FIt applies patches in nonrolling mode by default.
Which two are true about the execution of operating system scripts starting from Oracle Database 19c? (Choose two.)
AorainstRoot.sh can be executed automatically by the Database installer by using sudo or root credentials.
Broot.sh can be executed automatically by the Database Installer only if it is provided with root credentials.
CThe sudo password can be specified in a response file.
Droot.sh can be executed automatically by the Database installer only by using sudo credentials.
EThe sudo password must be specified in a response file.
FThe root password cannot be specified in a response file.
Examine this output:
Which two are true? (Choose two.)
AAny PDB not specified in the plan will be unable to execute statements in parallel.
BPDB3 can use all available parallel execution processes at times.
CPDB1 is always limited to 40% of the available system resources regardless of demand.
DAny PDB not specified in the plan will be able to use a maximum of 16.5% of the available system resources.
EPDB3 is guaranteed to receive at least 20% of the available system resources if there is enough demand.
FPDB2 is guaranteed at least 25% of the available parallel execution processes if there is enough demand.
Automatic Shared Memory Management is disabled for one of your database instances.
Some SQL statements perform poorly due to excessive hard parse activity, thereby degrading performance.
What would be your next step?
ARun the SQL Access Advisor.
BRun the Memory Advisor for the shared pool.
CRun the SQL Tuning Advisor.
DRun the Memory Advisor for the Program Global Area.
ERun the Memory Advisor for the System Global Area.
Which two are true about flashback features in Oracle Database 19c and later releases? (Choose two.)
AFlashback logs are automatically purged when DB_FLASHBACK_RETENTION_TARGET is set lower than the time they have already been retained.
BFlashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET only after there is space pressure.
CFlashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET before there is space pressure.
DFlashback logs are monitored for being older than the retention period defined in DB_FLASHBACK_RETENTION_TARGET and can be deleted by an administrator written event trigger.
EFlashback logs are automatically purged whenever the value of DB_FLASHBACK_RETENTION_TARGET is changed.
Which two are true about RMAN duplexed backup sets? (Choose two.)
AA duplexed backup set uses the same number of SBT channels as a non-duplexed backup set for the same number of files.
BA non-duplexed backup set written to disk can be duplexed to disk by backing up the backup set that is already on disk.
CA non-duplexed backup set written to SBT can be duplexed to tape by backing up the backup set that is already on tape.
DA non-duplexed backup set written to disk can be duplexed to tape by backing up the backup set that is already on disk.
EA non-duplexed backup set written to SBT can be duplexed to disk by backing up the backup set that is already on tape.
FA duplexed backup set always uses twice as many SBT channels as a non-duplexed backup set for the same number of files.
You are managing this configuration:
CDB1 is a container database.
PDB1 and PDB2 are two pluggable databases in CDB1.
USER1.EMP is a table in PDB1 and USER2.DEPT is a table in PDB2.
CDB1 user SYS executes these commands after connecting successfully to PDB2:
Which two are true? (Choose two.)
AThe inserts on USER1.EMP remain uncommitted when the session connected to PDB2.
BThe inserts on USER1.EMP were committed when the session inserted a row into USER2.DEPT.
CThe insert on USER2.DEPT fails because of the active transaction in the parent container.
DThe insert on USER2.DEPT is a recursive autonomous transaction by the child session and is committed.
EThe inserts on USER1.EMP were rolled back when the session connected to PDB2.
FThe insert on USER2.DEPT is uncommitted.
Which two are true about changing the LOCAL_UNDO_ENABLED property to false in a CDB? (Choose two.)
AAfter the change, only a common user with the required privilege can create an undo tablespace in CDB&ROOT.
BAny new PDB and existing PDBs are automatically configured to use the default undo tablespace in CDB$ROOT.
CAfter the change, only one undo tablespace can exist in CDB$ROOT.
DAfter the change, any user with the required privilege can create an undo tablespace in the PDBs.
EUndo tablespaces existing in PDBs must be dropped before the change.
FAfter the change, each existing PDB has to be reopened for the new undo mode to take effect.