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Exam Oracle Database 12c: RAC and Grid Infrastructure Administration
Number 1z0-068
File Name Oracle.1z0-068.PracticeTest.2018-07-04.91q.vcex
Size 533 KB
Posted Jul 04, 2018
Download Oracle.1z0-068.PracticeTest.2018-07-04.91q.vcex

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Demo Questions

Question 1

Which three statements are true about node listeners in a Grid Infrastructure Cluster using Flex ASM?


  1. They run from the Grid Infrastructure home by default.
  2. They listen only for database instances on the same node.
  3. They listen only for the ASM instance on the same node.
  4. There only can be one node listener per node.
  5. They listen on behalf on any ASM instance and all database instances on the same node.
Correct answer: ADE



Question 2

Which three statements are true about ASM Cloud File System (ACFS) auditing?


  1. Audit information gathered by each cluster node can be consolidated into the unified ACFS audit trail.
  2. acfsutil audit archive must be used to archive audit files that are larger than 10MB.
  3. acfsutil audit init must be run by a system administrator.
  4. acfsutil audit purge can be run by an audit manager.
  5. acfsutil audit read marks audit files to indicate that it is safe to purge them.
Correct answer: CDE
Explanation:
C: The acfsutil audit init command must be run by the system administrator before enabling auditing for any of the audit sources on a file system.D: Only an audit manager can run the acfsutil audit purge command.E: acfsutil audit read marks the audit trail to indicate to the audit manager that the log archive file for the current node has been reviewed, backed up as necessary, and is safe to purge.Incorrect Answers:B: acfsutil audit archive does not address file size.References: https://docs.oracle.com/database/121/OSTMG/GUID-DF1A88B0-E86C-4ABB-BDFD-B06DA8D4CBEC.htm#OSTMG90000
C: The acfsutil audit init command must be run by the system administrator before enabling auditing for any of the audit sources on a file system.
D: Only an audit manager can run the acfsutil audit purge command.
E: acfsutil audit read marks the audit trail to indicate to the audit manager that the log archive file for the current node has been reviewed, backed up as necessary, and is safe to purge.
Incorrect Answers:
B: acfsutil audit archive does not address file size.
References: https://docs.oracle.com/database/121/OSTMG/GUID-DF1A88B0-E86C-4ABB-BDFD-B06DA8D4CBEC.htm#OSTMG90000



Question 3

Which three statements are true regarding ACFS snapshots in Oracle 12c ASM?


  1. They are contained in a directory on the same volume as their parent file system.
  2. All ACFS snapshot operations for all filesystem are serialized clusterwide.
  3. You can create a snapshot from an existing snapshot.
  4. They can be administered using ASMCMD.
  5. They can only be accessed when the file system is mounted.
  6. They are always point-in-time copies of the parent file system.
Correct answer: BCE
Explanation:
All Oracle ACFS snapshot operations are serialized clusterwide in the kernel.  You chose to create a snapshot image on an existing snapshot group, select a snapshot group from the existing snapshot group table (make sure you select a snapshot group that has not reached its maximum limit of snapshot images).  Before you can access the files on a file system, you need to mount the file system. References:https://docs.oracle.com/database/121/OSTMG/GUID-5A3EF695-A795-4FEA-8BE2-AF657BD2238C.htm#OSTMG33000http://mysupport.netapp.com/NOW/public/eseries/amw/index.html#page/SANtricity_v11.20_Array_Management_Window_Help/create_PIT_image.html (Creating a Snapshot image 3rd point, 1st line).https://docs.oracle.com/cd/E19455-01/805-7228/6j6q7ueup/index.html (1st paragraph, 1st line).
All Oracle ACFS snapshot operations are serialized clusterwide in the kernel.  
You chose to create a snapshot image on an existing snapshot group, select a snapshot group from the existing snapshot group table (make sure you select a snapshot group that has not reached its maximum limit of snapshot images).  
Before you can access the files on a file system, you need to mount the file system. 
References:
https://docs.oracle.com/database/121/OSTMG/GUID-5A3EF695-A795-4FEA-8BE2-AF657BD2238C.htm#OSTMG33000
http://mysupport.netapp.com/NOW/public/eseries/amw/index.html#page/SANtricity_v11.20_Array_Management_Window_Help/create_PIT_image.html (Creating a Snapshot image 3rd point, 1st line).
https://docs.oracle.com/cd/E19455-01/805-7228/6j6q7ueup/index.html (1st paragraph, 1st line).



Question 4

Which two statements are true about initialization parameters for Clustered ASM instances?


  1. A change to ASM_DISKSTRING requires a restart of all ASM instances for the change to take effect.
  2. ASM_POWER_LIMIT controls the number of RDBMS instances that can access a disk group while it is being rebalanced.
  3. The ASM_DISKGROUP parameter is optional.
  4. The default value of INSTANT_TYPE is ASM.
  5. The maximum value of ASM_POWER_LIMIT is 1024.
Correct answer: CE
Explanation:
C: The default value of the ASM_DISKGROUPS parameter is a NULL string. If the parameter value is NULL or is not specified, then ASM does not mount any disk groups.E: The ASM_POWER_LIMIT initialization parameter specifies the default power for disk rebalancing in a disk group. The range of values is 0 to 1024.Incorrect Answers:B: The ASM_POWER_LIMIT initialization parameter specifies the default power for disk rebalancing in a disk group. The range of values is 0 to 1024.D: The default value of INSTANT_TYPE is RDBMS.Reference: https://docs.oracle.com/cd/E11882_01/server.112/e18951/asminst.htm#BHCEHJGA
C: The default value of the ASM_DISKGROUPS parameter is a NULL string. If the parameter value is NULL or is not specified, then ASM does not mount any disk groups.
E: The ASM_POWER_LIMIT initialization parameter specifies the default power for disk rebalancing in a disk group. The range of values is 0 to 1024.
Incorrect Answers:
B: The ASM_POWER_LIMIT initialization parameter specifies the default power for disk rebalancing in a disk group. The range of values is 0 to 1024.
D: The default value of INSTANT_TYPE is RDBMS.
Reference: https://docs.oracle.com/cd/E11882_01/server.112/e18951/asminst.htm#BHCEHJGA



Question 5

Examine this command:
   SQL> CREATE DISKROUP data NORMAL REDANDUNCY:
       FAILGROUP fgrpl DISK 
          ‘/dev/disk1’ NAME disk1, 
          ‘/dev/disk2’ NAME disk2, 
          ‘/dev/disk3’ NAME disk3, 
       FAILGROUP fgrpl2 DISK 
          ‘/dev/disk4’ NAME disk4, 
          ‘/dev/disk5’ NAME disk5, 
          ‘/dev/disk6’ NAME disk6, 
       FAILGROUP fgrpl3 DISK 
          ‘/dev/disk7’ NAME disk7, 
          ‘/dev/disk8’ NAME disk8, 
          ‘/dev/disk9’ NAME disk9, 
       ATTRIBUTE ‘au_size’=’4M’, 
          ‘compatible.asm’ = ’11.2’, 
          ‘compatible.rdbms’ = ’11.2’, 
          ‘compatible.advm’ = ’11.2’, 
          ‘content_type’ = ‘recovery’; 
Which two statements a true about this disk group, created using Grid Infrastructure 12.1?


  1. Each disk in each of the three fail groups is a mirror of the corresponding disk of the other two failure groups.
  2. File created in this disk group always has two copies for each allocation unit: one primary and one secondary.
  3. It can contain ASM Dynamic Volume Manager (ADVM) volumes.
  4. Any database instance with the COMPATIBLE parameter set to 11.2 or higher can access it.
  5. The ASM compatible attributes can be changed to 11.1 for this disk group.
Correct answer: CD



Question 6

Which two statements are true about the UNDROP clause of the ALTER DISKGROUP statement?


  1. It cancels pending drops of disks dropped using the DROP DISKGROUP command.
  2. A disk cannot be undropped as a result of a drop diskgroup.
  3. It automatically unmounts the disks after successfully undropping them.
  4. It is not possible to cancel pending drops of disks dropped using the force option.
Correct answer: BD
Explanation:
The UNDROP DISKS clause of the ALTER DISKGROUP statement cannot be used to restore disks that are being dropped as the result of a DROP DISKGROUP statement, or for disks that are being dropped using the FORCE clause. Reference: https://docs.oracle.com/cd/B28359_01/server.111/b31107/asmdiskgrps.htm
The UNDROP DISKS clause of the ALTER DISKGROUP statement cannot be used to restore disks that are being dropped as the result of a DROP DISKGROUP statement, or for disks that are being dropped using the FORCE clause. 
Reference: https://docs.oracle.com/cd/B28359_01/server.111/b31107/asmdiskgrps.htm



Question 7

Examine the output of the asmcmd and srvct1 commands:
   
 
Then you execute this command:
   $ srvctl relocate asm – currentnode host03 –targetnode host02 
Which three statements are true regarding the execution of this command based on the output shown?


  1. It fails because an ASM instance is not configured to run on HOST02.
  2. It succeeds and starts an ASM instance on HOST02 and shuts down the ASM instance on HOST03.
  3. It succeeds and 12c database instances connected to the ASM instance on HOST03 can be reconnected to the ASM instance on HOST02.
  4. It fails because the ASM instance has not been shut down first on HOST03.
  5. It succeeds and starts an ASM instance on HOST02 but the ASM instance on HOST03 is not shut down until all connected clients disconnected.
  6. It succeeds and 12c database instances connected to the ASM instance on HOST03 can be reconnected to the ASM instance on HOST01.
Correct answer: CEF



Question 8

Which three statements are true about ASM Cloud File System (ACFS) encryption?


  1. A copy of an encrypted file is not encrypted unless it is created in an encrypted directory.
  2. acfsutil encr init is used to establish role separation between encryption managers and encryption auditors.
  3. acfsutil encr off can be run by an encryption manager who may not have system administrator privileges.
  4. acfsutil encr on can be used to specify the encryption key length for a directory or file.
  5. An ACFS snapshot can be ACFS encrypted.
Correct answer: ADE
Explanation:
acfsutil encr on –k key_length specifies the encryption key length for a directory or file. Incorrect Answers:B: The acfsutil encr init command creates storage for encryption keys.C: Only an administrator can run the acfsutil encr off command on an Oracle ACFS file system.References: https://docs.oracle.com/cd/E11882_01/server.112/e18951/asmfs_util009.htm#OSTMG94010
acfsutil encr on –k key_length specifies the encryption key length for a directory or file. 
Incorrect Answers:
B: The acfsutil encr init command creates storage for encryption keys.
C: Only an administrator can run the acfsutil encr off command on an Oracle ACFS file system.
References: https://docs.oracle.com/cd/E11882_01/server.112/e18951/asmfs_util009.htm#OSTMG94010



Question 9

Which two statements are true concerning ASM diskgroups using disks with a 4k sector size?


  1. Their COMPATIBLE.ASM attributes must be set to 12.1 or higher.
  2. Their COMPATIBLE.ASM attributes must be set to 11.2 or higher.
  3. Performance of ACFS is improved by using these diskgroups.
  4. Their COMPATIBLE.RDBMS attributes must beset to 11.2 or higher.
  5. Their sector size attributes can be changed using the ALTER DISKGROUP command.
Correct answer: BD
Explanation:
The values for SECTOR_SIZE can be set to 512, 4096, or 4K if the disks support those values. The default value is platform dependent. The COMPATIBLE.ASM and COMPATIBLE.RDBMS disk group attributes must be set to 11.2 or higher to set the sector size to a value other than the default value. Incorrect Answers:C: Oracle ASM provides support for 4 KB sector disk drives without negatively affecting performance.Reference: https://docs.oracle.com/database/121/OSTMG/GUID-8B656725-D347-4166-8775-1070B6C4D580.htm#OSTMG10203
The values for SECTOR_SIZE can be set to 512, 4096, or 4K if the disks support those values. The default value is platform dependent. The COMPATIBLE.ASM and COMPATIBLE.RDBMS disk group attributes must be set to 11.2 or higher to set the sector size to a value other than the default value. 
Incorrect Answers:
C: Oracle ASM provides support for 4 KB sector disk drives without negatively affecting performance.
Reference: https://docs.oracle.com/database/121/OSTMG/GUID-8B656725-D347-4166-8775-1070B6C4D580.htm#OSTMG10203



Question 10

Examine the output of this command:
   ASMCMD> volinfo –G ACFS -a 
   Diskgroup Name: ACFS
   Volume Name: VOL1
   Volume Device: /dev/asm/vol1-280
   State: ENABLED
   Size (MB): 248
   Resize Unit (MB): 32
   Redundancy: MIRROR
   Stripe Columns: 4
   Stripe Width (K): 128
   Usage: ACFS
   Mountpath: /u01/app/grid/acfsmount
The ACFS disk group is a normal redundancy disk group with 5 GB of free space. 
To increase the size of the ACFS file system, you execute this command as the root user:
   $ /sbin/acfsutil size +200M /u01/app/grid/acfsmount 
Which two statements are true regarding the outcome of this command?


  1. It resizes VOL1.
  2. It fails to resize the filesystem because it must be unmounted before resizing.
  3. It fails to resize VOL1 because it must be executed as a user belonging to the SYSASM group.
  4. It succeeds but leaves the filesystem unmounted.
  5. It resizes the filesystem mounted on /u01/app/grid/acfsmount.
Correct answer: AD









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