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Oracle Database 10g R2: Administering RAC Sample Questions:

1. To install Oracle Database 10g RAC on a UNIX platform, which four directories will you identify for use? (Choose four.)

A) Oracle home directory (ORACLE_HOME)
B) NET_ADMIN directory
C) Oracle inventory directory
D) CRS home directory (ORA_CRS_HOME)
E) Oracle base directory (ORACLE_BASE)
F) group services directory (GSDJHOME)

2. You have a four-node cluster with instances RDBD1, RDBD2, RDBD3, and RDBD4. While evaluating statspack reports, you find nq: TX- index contention on page one under the category op 5 Timed Events.
Further study finds an unusually high number of c buffer busy waits in the Wait Events section. Checking the Instance Activity Stats section, you see an unusually high value for eaf Node Splits. Using v$segment_statistics, you identify that the top segment with c buffer busy waits is the index prooducts_pk, which obtains the primary key from a sequence. You wish to present alternative solutions to the team to help reduce contention.
Which three actions would you recommend to reduce the overheads? (Choose three.

A) Re-create the table using a natural key instead of a surrogate key.
B) Re-create the index as a global hash partitioned index.
C) Set fast_start_mttr_target to a higher value.
D) Encourage shorter transactions.
E) Set _lm_msg_batch_size to a higher value.
F) Increase the sequence cache size if retaining the sequence.

3. To complete a cluster database creation, the DBA must choose the cluster database storage method. Which storage choice is not correct? (Choose the incorrect one.)

A) Standard UNIX file system
B) Cluster File System
C) Raw Devices
D) Supported SAN/NAS storage
E) Automatic Storage Management (ASM)

4. View the Exhibit.

A Symmetric RAC and Physical Standby Database configuration is set up for a high availability requirement matching the one in the exhibit with the primary using 'maximum availability' protection mode.
Which two benefits are there for each primary instance in sending its redo to a corresponding standby instance, rather than having all the primary instances sending redo to the same standby apply instance? (Choose two.)

A) Multiple standby instances allow the redo to be written to standby redo logs more quickly than just using a single receiving instance by reducing commit time on the primary instances.
B) Multiple standby instances allow the redo to be applied more quickly by the standby apply instance after the redo has already arrived from the primary.
C) The services on the primary would be symmetric allowing performance on each instance to be equal in the event of a switchover or failover to the standby database.
D) If the redo receive load is spread across multiple receiving instances then the primary redo transport is less likely to become a bottleneck.
E) The workloads of the archive processes on the standby instances would be balanced, thereby allowing load balancing across the cluster where the standby resides.

5. You are creating a database in your RAC implementation. You are using the DBCA to create the database, and you selected the Raw Devices Mapping file on one of the screens of the DBCA. What is the reason for selecting this file?

A) You want to configure an ASM diskgroup containing raw devices.
B) You want to set the appropriate raw partition for each database file.
C) You want the DBCA to bind the partitions to raw devices.
D) You want to provide the DBCA with a list of all the storage devices that are currently bound to a raw interface.

Solutions: