Oracle : 1Z0-048 Questions & Answers
Last Updated: Oct 07, 2026
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Oracle 1Z0-048 Exam Overview:
| Certification Vendor: | Oracle |
|---|---|
| Exam Name: | Oracle Database 10g R2: Administering RAC |
| Exam Number: | 1Z0-048 |
| Available Languages: | English |
| Exam Duration: | 120 minutes |
| Exam Format: | Multiple Response, Multiple Choice |
| Related Certifications: | Oracle Database 10g Administrator Certified Associate (OCA) Oracle Database 10g Administrator Certified Professional (OCP) |
| Exam Price: | $245 USD |
| Recommended Training: | Oracle University Training |
| Exam Registration: | Oracle Certification Portal |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Proctored exam (online or testing center depending on Oracle partner delivery at the time) |
| Pre Condition: | Recommended: Oracle Database 10g Administrator Certified Associate (OCA) or equivalent DBA experience |
| Official Syllabus URL: | https://education.oracle.com |
Oracle 1Z0-048 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: High Availability Concepts | - RAC recovery scenarios - Failover mechanisms |
| Topic 2: Performance and Tuning | - Load balancing and failover - Troubleshooting performance issues - Monitoring RAC performance |
| Topic 3: Oracle RAC Architecture | - Shared storage concepts - Cluster fundamentals and components - Cache Fusion and interconnect communication |
| Topic 4: Installation and Configuration | - Installing Oracle Clusterware - Preparing RAC environment - Installing RAC database software |
| Topic 5: Cluster and Database Administration | - Backup and recovery in RAC - Services configuration and management - Managing RAC instances |
Answers About the Oracle Database 10g R2: Administering RAC Practice Package
Many candidates combine practice questions with official training. Recommended options include:
This package includes 150 practice questions for the Oracle Database 10g R2: Administering RAC exam. Every answer is verified by an experienced team of experts, so you can trust what you study.
Yes. The online test engine runs entirely in a web browser, which is why it works identically on Windows, Mac, Android, and iOS without any installation. If you can open a browser, you can practice — on a computer at home or a phone on the move.
You can register for the Oracle Database 10g R2: Administering RAC exam through the official channels:
The PC test engine installs on Windows and runs on a standard Java environment, which most computers already have or can add in minutes. Once installed, it simulates the real exam scenario with timed sessions, automatic scoring, and mistake tracking — a full practice lab on your own computer.
The Oracle Database 10g R2: Administering RAC practice questions are organized around the official exam objectives. Key topics include:
- High Availability Concepts ()
- Performance and Tuning ()
- Cluster and Database Administration ()
Coverage follows the official syllabus, so your practice time always maps to exam content.
Recommended: Oracle Database 10g Administrator Certified Associate (OCA) or equivalent DBA experience
You can confirm the current eligibility requirements on the official 1Z0-048 exam page before you register.
Oracle Database 10g R2: Administering RAC Sample Questions:
You are implementing a three-node RAC setup in your company. You have already performed these tasks:
1) Hardware and OS configuration 2) Cluster file system installation 3) Clusterware installation You executed the following command in one of the nodes: cluvfy stage -pre dbinst -n all
What is the reason for executing this command?
- A. to check for the existence of Oracle database software installation files in the /stage directory on all the nodes
- B. to check whether the dbinst directory is available on all the nodes
- C. to check if the ORACLEJHOME environmental variable is set to a correct value or not before the database installation
- D. to check for node connectivity and Clusterware integrity
Correct Answer: D 🗳️
View the Exhibit and examine an installation step of Oracle Enterprise Manager Grid Control 10gR2 to manage your RAC installation. You entered the host name but you are not sure about the port number. Thefollowing is the list of port numbers from the host ed-otraclin17b.us.oracle.com:
- A. 4889
- B. 1158
- C. 5561
- D. 1521
- E. 3938
Correct Answer: D 🗳️
After a failed cluster database creation process, you realize that the contents of the OCR does not
match the current cluster configuration anymore. Before you started the database creation
process, you created a logical backup of the OCR, and now you want to use this logical backup to
bring the OCR contents in sync with the current cluster configuration.
Which commands would you use and in which order to accomplish this task?
1 OCRCONFIG -REPAIR (on the local cluster node only)
2 OCRCONFIG -REPAIR (on all cluster nodes)
3 OCRCONFIG -RESTORE <path name>
4 OCRCONFIG -IMPORT <path name>
5 CRSCTL STOP CRS (on the local cluster node only)
6 CRSCTL STOP CRS (on all cluster nodes)
7 OCRCONFIG -SHOWBACKUP
8 CRSCTL START CRS (on the local cluster node only)
9 CRSCTL START CRS (on all cluster nodes)
- A. 7,6,3,2,9.
- B. 7,6,4,9.
- C. 5,3,8.
- D. 5,4,8.
- E. 6,3,9.
- F. 7,6,3,9.
- G. 6,4,9.
Correct Answer: G 🗳️
Which parameter file should you use to configure the Oracle notification server on your RAC nodes?
- A. $ORACLE_HOME/racg/usrco/ons.config
- B. $ORACLE_HOME/opmn/conf/ons. config
- C. $ORA_CRS_HOME/racg/usrco/ons. config
- D. $ORA_CRS_HOME/opmn/conf/ons. config
Correct Answer: D 🗳️
You have a four-node cluster with instances RDBD1, RDBD2, RDBD3, and RDBD4. While evaluating statspack reports, you find nq: TX- index contention on page one under the category op 5 Timed Events.
Further study finds an unusually high number of c buffer busy waits in the Wait Events section. Checking the Instance Activity Stats section, you see an unusually high value for eaf Node Splits. Using v$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. Encourage shorter transactions.
- B. Re-create the index as a global hash partitioned index.
- C. Re-create the table using a natural key instead of a surrogate key.
- D. Set _lm_msg_batch_size to a higher value.
- E. Set fast_start_mttr_target to a higher value.
- F. Increase the sequence cache size if retaining the sequence.
Correct Answer: B,C,F 🗳️
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