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Oracle Database 12c Certified Implementation Specialist Oracle Database 12c Essentials

Oracle Database 12c Essentials

Last Update May 8, 2024
Total Questions : 150

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Questions 4

Which two statements about switchover and failover are true?

Options:

A.  

A snapshot standby can be the target of a switchover or fast-start failover operation.

B.  

Neither a switchover nor a failover is possible to a far sync instance.

C.  

For fast-start failover, you must preselect the target standby database that will be used.

D.  

You can activate a standby database to test whether it is being updated correctly.

Discussion 0
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Questions 5

You execute some DMLcommands, followed by a COMMIT Statement.

Which option correctly describes how the logwriter (LGWR) process takes part in the transaction commit?

Options:

A.  

1. LGWR writes the commit record to disk.

2. LGWR writes all redo entries from Redo Log Buffer to disk.

B.  

1. GWR writes only the transaction's redo entries from Redo Log Buffer to disk.

2. LGWR writes the commit record to disk.

C.  

1. LGWR puts the commit record to Redo Log Buffer.

2. IGWR writes all redo entries from Redo Log Buffer to disk.

D.  

1. LGWR puts the commit record to Redo Log Buffer.

2. If the activity is high, LGWR waits three seconds for other transactions to commit.

3. LGWR writes all redo log entries from Redo Log Buffer to disk.

E.  

1. LGWR puts the commit record to Redo Log Buffer.

2. LGWR signals the database writer (DBW) process to write dirty blocks to disk.

3. LGWR writes all redo entries from Redo Log Buffer to disk.

Discussion 0
Questions 6

Which three events signal a database writer (DWR) to write buffers to disk?

Options:

A.  

The database advances a checkpoint.

B.  

A client process commits a transaction.

C.  

The redo log buffer becomes full.

D.  

A server process cannot find non-dirty blocks after scanning a threshold number of buffers.

E.  

A tablespace is changed to read-only status.

F.  

The database is shut down in immediate mode.

Discussion 0
Questions 7

Examine the statements:

SQL> CREATE TABLESPACE MYTBS DATAFILE '/disk1/mytbs_l.dbf ' SIZE 10M;

SQL> CREATE TABLE mytab (id NUMBER, descr VARCHAR2 (100) )

PARTITION BY RANGE(id) (

partition pi values loss than (100000) tablespacemytbs storage (initial lm),

partition p2 values less than (MAXVALUE) tablespacemytbs storage (initial 1m)

);

When inserting data, you get the error:

ORA-01688: unable to extend table SYS.MYTAB partition P2 by 128 in tablespace MYTBS

Which three operations would allow you to insert data without getting the error message?

Options:

A.  

Extend the logical volume by 10 MB where the data files are stored;

# lvextend -L+10M /diskl

B.  

Add a data file:

SQL>ALTER TABLESPACE MYTBS ADD DATAFILE ' /disk1/mytbs_2 .dbf SIZE 10M;

C.  

Move a partition to another tablespace:

SQL> CREATE TABLESPACE ADDITIONAL_TBS DATAFILE '/disk1/additional_tbs_1 .dbf' SIZE 10M;

SQL> ALTER TABLE MYTAB MOVE PARTITION P2 TABLESPACE ADDlTIONAL_TBS;

D.  

Resize the existing data file:

SQL> ALTER DATABASE DATAFILE '/diskl/mytbs_l .dbf' RESIZE 20M;

E) Remove a data file:

SQL> ALTER TABLESPACE MYTBS DROP DATAFILE '/diskl/mytbs_l - dbf';

Discussion 0
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