Which statement correctly describes

单选题 Which statement correctly describes the SQL profiling performed by the SQL Tuning Advisor?

A、 Itis a set of recommendations by the optimizer to create new indexes

B、 It is a set of recommendations by the optimizer to change the access methods used

C、 Itis auxiliary information collected by the optimizer for a SQL statement to help use better joins orders

D、 Itis a set of recommendations by the optimizer to restructure a SQL statement to avoidSuboptimal execution plans

E、 It is auxiliary information collected by the optimizer for a SQL statement to eliminate estimation error

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A、It will return an error because creation of a 1ocal role is not allowed in CDBSROOT

B、ROLE1 will be created only in CDBSROOR and App1_ ROOT.

C、ROLE1 will be created only in CDBSROOR

D、It will return an error because common roles must start with c##

E、 ROLE1 will be created in CDBSROOR, PDB1, App1_ Root, andAPP1 PDB1

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单选题 Examine this configuration1CDB1 is a container database.2 APP_ _ROOT is an application root in CDB1.3 APP PDB1 is an application PDB in APP_ ROOT.4 FLASHBACK DATABASE is ON.You execute these commands:$$ sqlplus sys/oracle_ 4U@localhost:1521/cdb1SQL> SELECT current_ scn FROM v$$database ;CURRENT SCN--------------2074756SQL> CREATE TABLE cdb1_ tab(c1 NUMBER、 ;Table created .SQL> ALTER SESSION SET CONTAINER=apP_ root;Session altered.SQL> CREATE TABLE app_ root_ tab(c1 NUMBER、 ;Table created.SQL> ALTER SESSION SET CONTAINER=app_ pdb1 ;Session altered.SQL> CREATE TABLE app_ pdb1_ tab (c1 NUMBER、 ;Table created 。SQL> conn / as sysdbaConnectedWhich table or set of tables will exist after the Flashback operation has completed?

A、none of the tables, because all three tables will be dropped

B、CDB1_ TAB and APP _PDB1_ TAB

C、CDB1_ TAB and APP ROOT_TAB

D、CDB1 TAB only

E、 CDB1_ TAB, APP_ ROOT _TAB, and APP_ PDB1_ TAB

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单选题 Examine this configuration
1CDB1 is a container database running in ARCHIVELOG mode.
2 Multiple uncommitted transactions are running in CDB1
3 Redo log groups 1 and 2 are INACTIVE
4edo log group 3 is the CURRENT group
All members of redo log group 3 are lost before it is archived Examine these
Possible steps
1SHUTDOWN ABORT
2STARTUP NOMOUNT
3 STARUP MOUNT
4 ALTER DATABASE MOUNT
5 RESTORE DATABASE
6 RECOVER DATABASE NOREDO
7 RECOVER DATABASE UNTIL AVAILABLE
8 RESTORE ARCHIVELOG ALL
9ALTER DATABASE OPEN
10 ALTER DATABASE OPEN RESETLOGS
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A、1,3,5,6,9

B、1,3,5,8,6,10

C、1,2,5,7,4,10

D、1,3,5,7,10

E、1,3,5,6,10

F、1,3,5,6,10

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单选题 A schema owner truncated a table in error and must recover the data Which Oracle
Flashback feature could be used to recover the data?

A、 FLASHBACK VERSION QUERY

B、 FLASHBACK TABLE

C、FLASHBACK TRANSACTION

D、 FLASHBACK DATABASE

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单选题 A user complains about poor database performance
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A、 V$SESSTAT

B、 V$SESSION WAIT

C、 V$SESSION EVENT

D、 V$SESSION

E、 V$SESSION WAIT CLASS

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2 Export the UNIVERSIRY tablespace metadata using EXPDP
3 Create a cross platform backup set from the UNIVERSITY tablespace on the source system. using an RMAN command that includes the DAMAPUMP clause
4 Copy the cross-platform backup sets to the destination system
5 Copy the Data Pump dump set from the source to the destination system
6 Restore the cross-platform backup set on the destination system using an RMAN command that includes the pamapump clause
7 Import the UNIVERSIRY tablespace metadata using IMPDP
8 Make the UNIVERSIRY tablespace read /write on the destination system
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A、3,4,6

B、1,3,4,6,8

C、1,2,3,4,5,6,7,8

D、2,3,4,5,6,7

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单选题 Which should be tuned first when doing a performance tuning exercise for an Oracle Database environment?

A、log writer performance

B、SQL statements

C、database instance memory management and sizes

D、general operating system health

E、 database writer performance

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C、 Open the CDB instance in upgrade mode. In CDB&ROOI, execute ALTER DAIABASE LOCAL UNDO ON, and then restart the CDB instance

D、 Open the CDB in read-only mode. In CDB$ROOI, execute ALTER DATABASE LOCAL UNDO ON and then change the CDB to read/write mode

E、 Open the CDB instance in upgrade mode. In each PDB, execute ALTER DATABASE LOCAL UNDO ON, create an UNDO tablespace, and then restart the CDB instance.

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