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Oracle 1Z0-048 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Installation and Configuration | - RAC database creation and configuration - Oracle Clusterware installation and setup |
| Topic 2: Oracle Real Application Clusters Architecture | - RAC instance architecture and Cache Fusion - Clusterware components and architecture |
| Topic 3: High Availability and Recovery | - Backup and recovery strategies in clustered environments - Failover and recovery mechanisms in RAC |
| Topic 4: Administration and Maintenance | - Node management and cluster administration - Service management and workload balancing |
| Topic 5: Storage Management | - Shared storage configuration and best practices - Automatic Storage Management (ASM) in RAC |
| Topic 6: Performance and Troubleshooting | - Diagnosing RAC interconnect and cache fusion issues - RAC performance tuning and monitoring |
Oracle Database 10g R2: Administering RAC Sample Questions:
You are asked to investigate a problem regarding client connectivity between the HR service and a database, which is on a four-node RAC cluster. The HR service has four preferred instances on the RAC cluster. This cluster also supports five other services. Occasionally, a client-connect request for the HR service takes several minutes to connect, whereas the other five services connect within a second or two. Client-side and server-side connection load balancing are used for all the services. Which combination of network settings would explain these symptoms? (Choose two.)
- A. The TNSNAMES. ORA file has an entry for all six services that uses the host name for the Public IP address and not the Virtual IP address.
- B. The TNSNAMES. ORA file has an entry for the five other services that use the hostnames for the Virtual IP addresses and all the listeners listen on both the Public and Virtual IP addresses.
- C. The listener on one or more nodes is listening on both the Public IP address and the Virtual IP address, and the HR TNSNAMES entry uses the Virtual IP address.
- D. The TNSNAMES.ORA file has an entry for the HR service that uses only the host name for the public IP address, and all the listeners listen on both the Public and Virtual IP addresses.
- E. The listener on one or more nodes is listening only on the Virtual IP address and the HR TNSNAMES entry uses the Hostnames for the Virtual IP addresses.
Correct Answer: B,D 🗳️
Your company has a combination of high availability and scalability requirements that need to be addressed, and RAC has been discussed as a solution. There are a mix of "off-the-shelf software products and homegrown applications currently in use in your environment that run on single-instance Oracle databases. You have been asked by the IT director to provide an impact analysis report to help assess the impact on applications when migrating to RAC. Which three are among the areas that should be examined for performance impact and application functionality impact or for both? (Choose three.)
- A. applications that use SQL profiles created by the ATO optimizer in the SQL Tuning Advisor
- B. applications that truncate tables in a data warehouse process
- C. applications that use large parallel full table scans
- D. applications that access small tables using the same index occasionally
- E. client/server type applications that use application local context variables
- F. three-tier applications that use application global context variables
Correct Answer: B,C,F 🗳️
You decide to implement a Dataguard configuration for your RAC installation to support your disaster recovery architecture. There are two instances on the primary and two on the physical standby. Which are the two appropriate settings for the DG_BROKER_CONFIG_FILE1 and DG_BROKER_CONFIG_FILE2 initialization parameters? (Choose two.)
- A. DG_BROKER_CONFIG_FILE1 set to a location shared between each standby database instance and DG_BROKER_CONFIG_FILE2 set to a different location shared between each standby database instance on the standby database cluster.
- B. DG_BROKER_CONFIG_FILE1 set to a location shared between each primary database instance and DG_BROKER_CONFIG_FILE2 set to a different location shared between each primary database instance on the primary database cluster.
- C. DG_BROKER_CONFIG_FILE1 set to a nonshared location for each secondary database instance and DG_BROKER_CONFIG_FILE2 set to a shared location for each secondary database instance on the secondary database cluster.
- D. DG_BROKER_CONFIG_FILE2 set to the same shared location for the second instance of both the primary and the standby databases.
- E. DG_BROKER_CONFIG_FILE1 set to the same shared location shared between the first instance of both the primary and the standby databases.
- F. DG_BROKER_CONFIG_FILE1 set to a nonshared location for each primary database instance and DG_BROKER_CONFIG_FILE2 set to a shared location for each primary database instance on the primary database cluster.
Correct Answer: A,B 🗳️
To install Oracle Database 10g RAC on a UNIX platform, which four directories will you identify for use? (Choose four.)
- A. Oracle base directory (ORACLE_BASE)
- B. NET_ADMIN directory
- C. Oracle home directory (ORACLE_HOME)
- D. CRS home directory (ORA_CRS_HOME)
- E. group services directory (GSDJHOME)
- F. Oracle inventory directory
Correct Answer: A,C,D,F 🗳️
After a power failure, you noticed that one of your cluster database instances did not start automatically, whereas all other instances came up successfully. What would you do to determine the precise cause for the instance startup failure? (Choose three.)
- A. Check for OCR corruptions by using the OCRCHECK command.
- B. Check the alert.log file that belongs to the Oracle Clusterware software.
- C. Check if the Oracle Clusterware is functional by using the CRSCTL command.
- D. Enable extra debugging in the Oracle Clusterware software by using the CRSCTL command.
- E. Check the resource state by using the CRS_STAT command.
- F. Check the alert.log file that belongs to the instance that did not start.
- G. Reboot the node where the failing instance resides to check if the problem is persistent.
Correct Answer: B,E,F 🗳️
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