Oracle Oracle Database 1Z0-068 Questions & Answers

• Question 141:

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

  A. Their COMPATIBLE.ASM attributes must be set to 12.1 or higher.

  B. Their COMPATIBLE.ASM attributes must be set to 11.2 or higher.

  C. Performance of ACFS is improved by using these diskgroups.

  D. Their COMPATIBLE.RDBMS attributes must beset to 11.2 or higher.

  E. Their sector size attributes can be changed using the ALTER DISKGROUP command.

  Correct Answer: BD

  Section: (none)

  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 142:

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

  A. They are contained in a directory on the same volume as their parent file system.

  B. All ACFS snapshot operations for all filesystem are serialized clusterwide.

  C. You can create a snapshot from an existing snapshot.

  D. They can be administered using ASMCMD.

  E. They can only be accessed when the file system is mounted.

  F. They are always point-in-time copies of the parent file system.

  Correct Answer: BCE

  Section: (none)

  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 143:

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

  A. A change to ASM_DISKSTRING requires a restart of all ASM instances for the change to take effect.

  B. ASM_POWER_LIMIT controls the number of RDBMS instances that can access a disk group while it is being rebalanced.

  C. The ASM_DISKGROUP parameter is optional.

  D. The default value of INSTANT_TYPE is ASM.

  E. The maximum value of ASM_POWER_LIMIT is 1024.

  Correct Answer: CE

  Section: (none)

  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 144:

  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' = '11.12',

  `compatible.rdbms' = '11.12',

  `compatible.advm' = '11.12',

  `content_type' = `recovery';

  Which two statements a true about this disk group, created using Grid Infrastructure 12.1?

  A. Each disk in each of the three fail groups is a mirror of the corresponding disk of the other two failure groups.

  B. File created in this disk group always has two copies for each allocation unit: one primary and one secondary.

  C. It can contain ASM Dynamic Volume Manager (ADVM) volumes.

  D. Any database instance with the COMPATIBLE parameter set to 11.2 or higher can access it.

  E. The ASM compatible attributes can be changed to 11.1 for this disk group.

  Correct Answer: BC

  Section: (none)

  B: NORMAL REDUNDANCY requires the existence of at least two failure groups (see the FAILGROUP clause that follows). Automatic Storage Management provides redundancy for all files in the disk group according to the attributes specified in the disk group templates. NORMAL REDUNDANCY disk groups can tolerate the loss of one group.

  C: The COMPATIBLE.ADVM attribute determines whether the disk group can contain Oracle ADVM volumes.

  Incorrect Answers:

  E: The COMPATIBLE.ADVM attribute value must be set to 11.2 or higher.

  Reference: https://docs.oracle.com/database/121/SQLRF/statements_5009.htm#SQLRF01114

• Question 145:

  Examine this command:

  SQl> CREATE DISKGROUP RECO HIGH REDUNDANCY:

  FAILGROUP fgrpl1 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' = '12.1',

  `compatible.rdbms' = '12.1',

  `compatible.advm' = '12.1',

  `content_type' = `recovery';

  Which two statements are true about this disk group?

  A. File created in it have three copies for each allocation unit.

  B. Any database instance with the COMPATIBLE parameter 10.1 and higher can use it.

  C. The Compatible attribute values of the disk group can be changed to lower values.

  D. Files created using a template with the redundancy attributes set to MIRROR will have three-way Mirroring.

  E. The RECO diskgroup may only be used for the FRA.

  F. Files created using a template with the redundancy attribute set to HIGH will have three-way mirroring.

  Correct Answer: AF

  Section: (none)

  For Oracle ASM to mirror files, specify the redundancy level as NORMAL REDUNDANCY (2-way mirroring by default for most file types) or HIGH REDUNDANCY (3-way mirroring for all files).

  Note:

  When a file is created, redundancy and striping attributes are set for that file based on an explicitly named template or the system template that is the default template for the file type.

  Incorrect Answers:

  B: Compatible.rdbms is set to 12.1, not to 10.1.

  C: The compatible attributes cannot be reversed.

  D: With the MIRROR redundancy attribute, the file is written to a disk in one failure group, a mirrored copy of the file is written to a disk in another failure group.

  E: FRA (Flash Recovery Area) is not referenced in the creation of the diskgroup.

  References: https://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_5008.htm

• Question 146:

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

  A. They run from the Grid Infrastructure home by default.

  B. They listen only for database instances on the same node.

  C. They listen only for the ASM instance on the same node.

  D. There only can be one node listener per node.

  E. They listen on behalf on any ASM instance and all database instances on the same node.

  Correct Answer: ADE

  Section: (none)

• Question 147:

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

  A. Audit information gathered by each cluster node can be consolidated into the unified ACFS audit trail.

  B. acfsutil audit archive must be used to archive audit files that are larger than 10MB.

  C. acfsutil audit init must be run by a system administrator.

  D. acfsutil audit purge can be run by an audit manager.

  E. acfsutil audit read marks audit files to indicate that it is safe to purge them.

  Correct Answer: CDE

  Section: (none)

  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 148:

  Which two statements are true about Flex ASM in a Flex Cluster?

  A. Oracle databases from releases older than 12c cannot use Flex ASM.

  B. ACFS may only be configured on a hub node running an ASM instance.

  C. Instances of ASM-based databases on hosts that have no ASM instance running, require Flex ASM.

  D. Flex ASM requires that I/Os requests be sent through an ASM Proxy Instance, regardless of database and ASM instance placement in a cluster.

  E. Hub nodes with connections from multiple leaf nodes must run an ASM instance.

  Correct Answer: AC

  Section: (none)

• Question 149:

  A directory +DATA/ORCL/DATAFILE/USERS exists in ASM.

  USERS is a user created directory; ORCL and DATAFILE are system generated directories.

  Which two statements are true about user-created directories?

  A. You can create subdirectories under the USERS directory.

  B. You cannot rename a user-created subdirectory.

  C. You cannot drop a directory containing aliases unless you delete the aliases first.

  D. You cannot create a user-defined directory at the root (+) level.

  E. You cannot create a nested subdirectory /USERS/2014 under USERS with a single CREATE DIRETORY command even if directory USER1 doesn't exist.

  Correct Answer: AC

  Section: (none)

• Question 150:

  Which three components are integral parts of High Availability NFS (HANFS)?

  A. Application VIP

  B. DHCP

  C. ExportFS

  D. HAVIP

  E. NFS

  F. HAIP

  Correct Answer: CDE

  Section: (none)

  CD: In addition to ACFS/ADVM and ASM, HANFS also relies on new Oracle 12.1 Clusterware (CRS) resources, namely the HAVIP and the ExportFS.

  DE: High Availability Network File Storage (NFS) for Oracle Grid Infrastructure provides uninterrupted service of NFS V2/V3/V4 exported paths by exposing NFS exports on Highly Available Virtual IPs (HAVIP) and using Oracle Clusterware

  agents to ensure that the HAVIPs and NFS exports are always online.

  References: https://docs.oracle.com/database/121/OSTMG/GUID-4D7A5911-8FA6-47DC-98BB- 593B2C90D43E.htm#OSTMG95489

  http://www.oracle.com/ocom/groups/public/@otn/documents/webcontent/2011281.pdf