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Oracle Database 12c: RAC and Grid Infrastructure Administration

Question No: 51

Which three statements are true regarding Flex ASM on a four-node cluster consisting of three-hub nodes and a leaf node?

  1. An ASM instance and database instances can coexist on the same hub node.

  2. A database instance on a hub node can be a client of an ASM instance running on any leaf node.

  3. A database instance on a hub node can be a client of an ASM instance running on any hub node.

  4. A database instance on a leaf node can be a client of an ASM instance running on any hub node.

  5. A database instance on a hub node uses an ASM instance as an I/O server when requesting I/O todiskgroups.

  6. ASM Cluster File System (ASFS) can only be deployed on hub nodes.

Answer: A,C,F

Question No: 52

Examine this command to create a volume in the DATA disk group: SQLgt;ALTER DISKGROUP DATA ADD VOLUME vo11 SIZE 10g HIGH STRIPE_WIDTH 1M;

STRIPE_COLUMNS 1;

The DATA disk group has 50GB free space.

Which two are prerequisites for successful execution of this command?

  1. COMAPTIBLE.ASM and COMPATIBLE.ADVM must be set to 11.2 or higher for the DATA disk group.

  2. The DATA disk group must not be created with external redundancy.

  3. The DATA disk group must not contain any other volume.

  4. The DATA disk group must have at least three failure groups.

  5. The DATA disk group must have an AU size of 1MB.

Answer: A,D Explanation:

The compatibility parameters COMPATIBLE.ASM and COMPATIBLE.ADVM must be set to

11.2 or higher for the disk group.

A high redundancy disk group must contain at least three failure groups. Reference:

https://docs.oracle.com/cd/E11882_01/server.112/e18951/asmdiskgrps.htm#OSTMG1007 2 https://docs.oracle.com/cd/E18283_01/server.112/e16102/asmdiskgrps.htm

Question No: 53

Which three statements are true about Oracle Clusterware components, architecture, and behavior?

  1. The Cluster Ready Services Daemon (CRSD) is responsible for monitoring and maintaining the availabilityof cluster resources defined in the Oracle Local Repository file (OLR).

  2. All cluster nodes can write or read from the Oracle Clusterware Repository (OCR) file at the same time.

  3. The Oracle High Availability Services Daemon (OHASD) is responsible for monitoring and maintaining theavailability of the Clusterware stack on a cluster node.

  4. Voting disks stored in Automatic Storage Management (ASM) can be discovered or used even if the ASM instance on a cluster node is down.

  5. The Cluster Synchronization Services Daemon (CSSD) must connect to the cluster by accessing theOracle Clusterware Repository (OCR) file before the Oracle High Availability Services Daemon (OHASD) is started.

  6. Time synchronization in an Oracle Cluster is possible without using network Time Protocol (NTP).

Answer: A,C,E

Question No: 54

Which three statements are true about services when used with transparent application failover (TAF) for an administrator-managed RAC database?

  1. TAF-enabled sessions fail over to a surviving instance accepting logins for the service.

  2. TAF-settings for the service override TAF settings in TNS entry used by the client.

  3. TAF can restart a query or a transaction after failover.

  4. The TAF settings for a client connections overrides any TAF settings in the service definition.

  5. TAF PRECONNECT requires configuration for the service and in the client TNS entry.

Answer: B,C,E

Question No: 55

Which two Operating System users and groups must be created on each node before installing Oracle Grid Infrastructure 12c?

  1. an O/S user to own the Clusterware installation and a different O/S user to own the Automatic StorageManagement (ASM) installation

  2. an O/S group to own the software inventory

  3. an O/S user to own the Oracle Database installation

  4. an O/S group called dba

  5. a group to own the ASMLIB-provisioned storage

  6. a group to own Automatic-Storage Management (ASM) Filter Driver-provisioned storage

Answer: C,D

Question No: 56

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 he number of RDBMS instances that can access a disk group while it isbeing 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.

Answer: C,E

Question No: 57

Which two statements are true about v$asm – views in clustered environment?

  1. They exist both in ASM and RDBMS instances, and display the same output.

  2. Their names can be seen in dict when connected to an ASM instance.

  3. Their names can be seen in v$fixed_table when connected to an instance of any type that is started.

  4. They exist in both in ASM and RDBSM instances, but they can display different outputs depending on theinstance type.

  5. gv$asm_attribute can be used to display the ASM_POWER_LIMIT attribute of all ASM instances in thecluster.

Answer: B,D

Question No: 58

When using Oracle 12 Clusterware, which two actions are required to repair the ocr.loc file on host01 in a cluster having three other nodes called host02, host03, and host04?

  1. Run ocr.config -repair on another node in the cluster to repair the ocr.loc file on host01

  2. Stop the clusterware stack on host01 only.

  3. Stop the clusterware stack on all cluster nodes.

  4. Run ocrconfig -repair on host01.

  5. Stop the clusterware stack on host01 and on the node used to issue the ocrconfig

-repair command.

Answer: B,C

Question No: 59

Which statement is true about using OPatch to patch Oracle Grid Infrastructure 12c?

  1. All grid infrastructure patches may be applied in a rolling fashion with Opatch.

  2. Opatch can patch all cluster nodes simultaneously without stopping the clusterware on all nodes.

  3. Opatch can patch all cluster nodes simultaneously only for nonrolling patches.

  4. Applying patches with Opatch must be done in an out-of-place fashion.

Answer: A

Question No: 60

Which three options have a RAC-specific tuning component?

  1. contention on index leaf blocks

  2. sequence definitions

  3. the size of the online redo log buffers

  4. contention for online redo log files

  5. contention for archived redo log files

  6. the load on the Cluster Interconnect

Answer: A,C,F

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