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Oracle Database 10g R2: Administering RAC Sample Questions:

1. You are requested to make your Web server, which accesses a clustered Oracle database, highly available. Which solution would you propose?

A) Bring your Web server under control of the Oracle Clusterware and use the private IP address to reach your Web server from your clients.
B) Bring your Web server under control of the Oracle Clusterware and use the public IP address to reach your Web server from your clients.
C) Bring your Web server under control of the Oracle Clusterware and use an application VIP address to reach your Web server from your clients.
D) Because you cannot use Oracle Clusterware to protect your Web server, you come up with an operating system solution.
E) Bring your Web server under control of the Oracle Clusterware and use the RAC VIP address to reach your Web server from your clients.

2. In a RAC environment, you see a steep increase for enq:HW- contention and gc current grant wait events. What would you do to fix this issue?

A) Use larger uniform extent sizes for objects.
B) Increase the cache size of sequences.
C) Reduce the number of updates causing locks on tables accessed by multiple instances.
D) Reduce the time of transactions by committing more often.

3. Which statement is true regarding undo management in a RAC environment?

A) It is possible to store undo tablespaces on nonshared disks.
B) You cannot mix automatic undo management and manual undo management.
C) A RAC database must have defined only one undo tablespace for each instance.
D) A RAC database contains one undo tablespace shared by all instances.

4. While creating a new service inside your ORCL database, you encounter a problem during the execution of the srvctl add service command. Because you are unable to explain the reason for this failure, you decide to log a service request in Oracle Metalink. You want to make this service request as complete as possible. You want to create a trace file from your problematic srvctl command execution so that Oracle Support has all possible information to quickly identify and resolve your problem. How do you create a Java-based tool trace file?

A) Set the SRVM_DEBUG environment variable to TRUE before you execute the srvctl command.
B) Request extra information by adding the -d (debug) command-line flag at the srvctl command line.
C) Set the SRVM_TRACE environment variable to TRUE before you execute the srvctl command.
D) Set the DEBUG environment variable to TRUE before you execute the srvctl command.
E) Request extra information by adding the -v (verbose) command-line flag at the srvctl command line.

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

Solutions: