Online Access Free Oracle.1z0-062.v2022-01-28.q200 Practice Test (Page 39)

1z0-062 Exam Question 186

You support Oracle Database 12c Oracle Database 11g, and Oracle Database log on the same server.
All databases of all versions use Automatic Storage Management (ASM).
Which three statements are true about the ASM disk group compatibility attributes that are set for a disk group? (Choose three.)

A.The ASM compatibility attribute controls the format of the disk group metadata.

B.RDBMS compatibility together with the database version determines whether a database Instance can mount the ASM disk group.

C.The RDBMS compatibility setting allows only databases set to the same version as the compatibility value, to mount the ASM disk group.

D.The ASM compatibility attribute determines some of the ASM features that may be used by the Oracle disk group.

E.The ADVM compatibility attribute determines the ACFS features that may be used by the Oracle 10 g database.

Correct Answer: A,B,D

Explanation
AD: The value for the disk group COMPATIBLE.ASM attribute determines the minimum software version for an Oracle ASM instance that can use the disk group. This setting also affects the format of the data structures for the Oracle ASM metadata on the disk.
B: The value for the disk group COMPATIBLE.RDBMS attribute determines the minimum COMPATIBLE database initialization parameter setting for any database instance that is allowed to use the disk group. Before advancing the COMPATIBLE.RDBMS attribute, ensure that the values for the COMPATIBLE initialization parameter for all of the databases that access the disk group are set to at least the value of the new setting for COMPATIBLE.RDBMS.
For example, if the COMPATIBLE initialization parameters of the databases are set to either 11.1 or 11.2, then COMPATIBLE.RDBMS can be set to any value between 10.1 and 11.1 inclusively.
Not E:
/The value for the disk group COMPATIBLE.ADVM attribute determines whether the disk group can contain Oracle ASM volumes. The value must be set to 11.2 or higher. Before setting this attribute, the COMPATIBLE.ASM value must be 11.2 or higher. Also, the Oracle ADVM volume drivers must be loaded in the supported environment.
/ You can create an Oracle ASM Dynamic Volume Manager (Oracle ADVM) volume in a disk group. The volume device associated with the dynamic volume can then be used to host an Oracle ACFS file system.
The compatibility parameters COMPATIBLE.ASM and COMPATIBLE.ADVM must be set to 11.2 or higher for the disk group.
Note:
* The disk group attributes that determine compatibility are COMPATIBLE.ASM, COMPATIBLE.RDBMS.
and COMPATIBLE.ADVM. The COMPATIBLE.ASM and COMPATIBLE.RDBMS attribute settings determine the minimum Oracle Database software version numbers that a system can use for Oracle ASM and the database instance types respectively. For example, if the Oracle ASM compatibility setting is 11.2, and RDBMS compatibility is set to 11.1, then the Oracle ASM software version must be at least 11.2, and the Oracle Database client software version must be at least 11.1. The COMPATIBLE.ADVM attribute determines whether the Oracle ASM Dynamic Volume Manager feature can create an volume in a disk group.

1z0-062 Exam Question 187

Which statement is true about redo log files during instance recovery?

A.All current, online, and archived redo logs are required to complete instance recovery.

B.All redo log entries in the current and active logs are applied to data files to reconstruct changes made after the most recent checkpoint.

C.All redo log entries in the current log are applied to data files until the checkpoint position is reached.

D.All current, active, and inactive redo logs are required to complete instance recovery.

1z0-062 Exam Question 188

Which action takes place when a file checkpoint occurs?

A.All buffers for a checkpointed file that were modified before a specific SCN are written to disk by DBWn and the SCN is stored in the control file.

B.The Database Writer process (DBWn) writes all dirty buffers in the buffer cache to data files.

C.The Log Writer process (LGWR) writes all redo entries in the log buffer to online redo log files.

D.The checkpoint position is advanced in the checkpoint queue.

1z0-062 Exam Question 189

Which three statements are true about a job chain? (Choose three.)

A.It can contain a nested chain of jobs.

B.It can be used to implement dependency-based scheduling.

C.It cannot invoke the same program or nested chain in multiple steps in the chain.

D.It cannot have more than one dependency.

E.It can be executed using event-based or time-based schedules.

1z0-062 Exam Question 190

Examine the following command:
SQL> DBMS_STATS. SET_TABLE_PREFS ('SH', 'CUSTOMERS', 'PUBLISH', 'false');
What is the effect of executing this command?

A.Statistics for the CUSTOMERStable are locked and cannot be overwritten.

B.Statistics subsequently gathered on the CUSTOMERStable are stored as pending statistics.

C.Existing statistics for the CUSTOMERStable become unusable for the query optimizer.

D.Automatic statistics collection is stopped for the CUSTOMERStable.

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