A user complains about poor database

单选题

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?

A、

V$SESSTAT

B、

V$SESSION_WAIT

C、

V$SESSION_EVENT

D、

V$SESSION

E、

V$SESSION_WAIT_CLASS

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All members of redo log group 3 are lost before it is archived

Examine these possible steps

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Choose the minimum required steps in the correct order to recover the database

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 69. Examine this configuration:

1. CDB1 is a container database.

2. COMMON USER PREFIX is set to an empty string.

3. PDB1 is a pluggable database in CDB1.

4. APP1 ROOT is an application container in CDB1.

5. APP1_PDB1 is an application PDB in APP1_ROOT.

You execute these commands:

$ sqlplus sys/oracle@localhost:1521/cdbi as sysdba

SOL> CREATE ROLE rolel CONTAINER-CURRENT；

Which is true?

A、

It will return an error because creation of a local role is not allowed in CDB$ROOT

B、

ROLE1 will be created only in CDB$ROOT and App1_ROOT.

C、

ROLE1 will be created only in CDB$ROOT

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

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It is a set of recommendations by the optimizer to create new indexes

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

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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?

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FLASHBACK VERSION QUERY

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FLASHBACK TABLE

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A、

Open the CDB instance in restricted mode. In CDB$ROOT, drop the UNDO tablespace Execute ALTER DATABASE LOCAL UNDO ON in each PDB. and then restart the CDB instance

B、

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

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CDB1_TAB and APP_PDB1_TAB

C、

CDB1_TAB and APP ROOT_TAB

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CDB1_TAB only

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SQL statements

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The universiry tablespace is currently open read/write

The source and destination platforms have the same endian format.

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4. Copy the cross-platform backup sets to the destination system

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3,4,6

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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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