C. ASM disks are partitioned in allocation units of one megabyte each.

A. Similar to an RDBMS instance, you can use ALTER SYSTEM ENABLE RESTRICTED SESSION to prevent connections to the instance. While SHUTDOWN IMMEDIATE will prevent connections to the ASM instance, this is most likely overkill if all you want to do is temporarily prevent connections. Choices C and D are not valid commands and will generate an error message.

B. The initialization parameter ASM_DISKGROUP, valid only in an ASM instance, specifies the disk groups to be automatically mounted when the ASM instance starts. ASM_DISKSTRING is operating system dependent and restricts the file system devices that can be used to create disk groups. ASM_DISKMOUNT and ASM_MOUNTGROUP are not valid initialization parameters.

A. An ASM instance can be started up and shut down in the same way that an RDBMS database can, except that an ASM instance cannot be in the OPEN state because it does not have a data dictionary or a control file.

D. When an ASM instance receives a SHUTDOWN command, it passes the same option (NORMAL, IMMEDIATE or TRANSACTIONAL) to all database instances that rely on the ASM instance for disk group services.

D. You must use FORCE if the disk has previously been used as part of a disk group. If the disk has never been used as part of a disk group, using the FORCE keyword returns an error.

B. Files such as ARCHIVELOG files use coarse-grained striping. Fine striping stripes the files every 128KB while coarse striping stripes the files every 1MB. All file types with the exception of FLASHBACK, CONTROLFILE, and ONLINELOG are striped coarse.

B. After the RMAN script is run and the database is up and running successfully, you may delete the old database files.

B. If the DROP DISK operation has not yet completed, you can cancel and roll back the entire DROP DISK operation by using ALTER DISKGROUP ... UNDROP DISKS, with the disk group still being continuously available to all users.

B. A fully qualified existing ASM filename has the format +group/dbname/filetype/tag.file.incarnation. In this case, filetype is datafile, and tag is the tablespace name to which it belongs, or users02.

C. RBAL coordinates rebalance activity for a disk group in an ASM instance, ORBn actually performs the extent movement in an ASM instance, and OSMB acts as a bridge between the ASM instance and the RDBMS instance. There is no such process name ASMn.

A. Note that the UNDROP operation will cancel a drop operation in progress but cannot reverse a drop operation that has already completed. For HIGH REDUNDANCY, at least three failure groups must be specified. While you can combine a drop and add operation into one command, the command can reference only one disk group.

A. All types of database files are spread across all disks in the disk group to ensure redundancy unless the redundancy is set to EXTERNAL.

A. If the DROP DISK operation has already completed, you must use ALTER DISKGROUP ... ADD DISK to add the disk back to the disk group. In any case, the disk group is continuously available to all users.

A. The ADD DIRECTORY command does not use V$ASM_OPERATION to track its progress, because this operation adds only a small amount of metadata—a directory object—to the disk group and takes a minimal amount of time to complete.

D. The ALTER DISKGROUP ... ADD DISK command adds all disks that match the discovery string but are not already part of the same or another disk group.

B. The INSTANCE_TYPE for an ASM instance is ASM; otherwise, it is RDBMS, whether it uses ASM or not. The ASM_POWER_LIMIT command controls the speed of a disk group rebalance, but its maximum value is 11. For an ASM instance, the minimum recommended value for LARGE_POOL_SIZE is 8MB.

A. When an ASM instance shuts down with NORMAL, IMMEDIATE, or TRANSACTIONAL, the same shutdown option is passed to all dependent instances and the ASM instance waits for the dependent instances to shut down before shutting itself down. If an ASM instance shuts down with ABORT, it immediately shuts down, the dependent instances lose their connection to the ASM instance, and as a result, they shut down with ABORT either before or after the ASM instance shuts down completely.

A. Each database datafile can reside in a different disk group; each disk group can also contain datafiles from other databases.

F, G. ASM supports datafiles, log files, control files, archive logs, RMAN backup sets, SPFILEs, and other Oracle database file types, but not password files or init.ora files.