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Certification blueprints change, and outdated material can quietly sink your 1Z0-048 score. Actual4Labs reviews and refreshes its Oracle Database 10g R2: Administering RAC practice questions on a continuous basis, tracking every objective change the vendor announces. Your 2026 purchase includes 365 days of free updates, so the material you study is the material being tested.
| Certification Vendor: | Oracle |
|---|---|
| Exam Name: | Oracle Database 10g R2: Administering RAC (Real Application Clusters) |
| Exam Number: | 1Z0-048 |
| Exam Duration: | 120 minutes |
| Real Exam Qty: | 64 |
| Exam Format: | Multiple Response, Multiple Choice |
| Passing Score: | 66% |
| Certificate Validity Period: | Non-expiring (legacy Oracle certification policy for 10g-era exams) |
| Available Languages: | English |
| Related Certifications: | Oracle Database 10g RAC Specialist Oracle Database 10g Administrator Certified Professional (OCP) |
| Exam Price: | USD 245 |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Proctored exam delivered at authorized test centers (Pearson VUE / Oracle Testing Centers) |
| Pre Condition: | Recommended: Oracle Database 10g Administrator Certified Professional (OCP) or equivalent Oracle DBA experience |
| Official Syllabus URL: | https://education.oracle.com/ |
| Section | Objectives |
|---|---|
| Performance and Troubleshooting | - Diagnosing RAC interconnect and cache fusion issues - RAC performance tuning and monitoring |
| Administration and Maintenance | - Service management and workload balancing - Node management and cluster administration |
| Installation and Configuration | - RAC database creation and configuration - Oracle Clusterware installation and setup |
| High Availability and Recovery | - Backup and recovery strategies in clustered environments - Failover and recovery mechanisms in RAC |
| Storage Management | - Automatic Storage Management (ASM) in RAC - Shared storage configuration and best practices |
| Oracle Real Application Clusters Architecture | - RAC instance architecture and Cache Fusion - Clusterware components and architecture |
The 1Z0-048 exam is the official test behind the Other Oracle Certification certification, a Professional-level credential from Oracle. Passing it validates the skills measured by the Oracle Database 10g R2: Administering RAC objectives and proves to employers that you can apply those skills in real-world scenarios, not just recite theory. The credential also sits alongside related certifications such as Oracle Database 10g Administrator Certified Professional (OCP), Oracle Database 10g RAC Specialist, making it a strong building block in a broader Oracle certification path. For candidates planning a longer-term career move, the 1Z0-048 exam is often the step that turns study effort into a verifiable, resumé-ready qualification.
The Oracle Database 10g R2: Administering RAC blueprint is divided into 6 exam domains. The first three are Oracle Real Application Clusters Architecture, Performance and Troubleshooting, and High Availability and Recovery. The weightings matter: they tell you where the bulk of your score comes from, so allocate study time in proportion rather than spreading it evenly. Scroll back to the exam topics section above for the complete domain-by-domain breakdown of the 1Z0-048 exam.
The Oracle Database 10g R2: Administering RAC exam gives you 120 minutes to work through 64 questions. Do the math before test day: divide the total time by the question count to set a steady per-question pace, and treat that number as a hard budget rather than a guideline. When a question eats more than its share, flag it and move on — a flagged question can be revisited, but lost minutes can't. Running two or three full timed mock exams in the Actual4Labs test engine before your exam date is the most reliable way to make that pacing automatic.
The passing score for the Oracle Database 10g R2: Administering RAC exam is 66%, and the official registration fee is USD 245. Keep in mind that a failed attempt means paying that fee in full again — there are no discounted retakes — so booking the exam before you're ready is the most expensive shortcut in certification. A practical rule: take a timed self-assessment with Actual4Labs practice tests first, and only schedule your seat once you're scoring comfortably above the passing mark with time to spare. That buffer absorbs exam-day nerves and the handful of questions that always seem to come from nowhere.
According to Oracle, the Oracle Database 10g R2: Administering RAC exam uses the following question formats: Multiple Choice, Multiple Response. Different formats reward different habits. For scenario-based items, read the final sentence of the question stem first so you know what's actually being asked before you dig into the details, and never change an answer unless you can point to the exact clue you missed. The Actual4Labs question bank lets you rehearse every format until each one feels routine.
Oracle currently offers the 1Z0-048 exam in English. Choose the language you can reason in fastest under time pressure — reading speed matters more than most candidates expect. If you plan to test in English, working through Actual4Labs's 150 English practice questions doubles as terminology training, so the phrasing on exam day feels familiar rather than foreign.
The credential you earn by passing the Oracle Database 10g R2: Administering RAC exam remains valid for Non-expiring (legacy Oracle certification policy for 10g-era exams). That clock is worth protecting: set a reminder well before the expiry date and review the official recertification options early, so staying certified becomes a planned task instead of a last-minute scramble. Recertification policies are set by Oracle and can change, so confirm the current rules on the official certification page.
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Oracle adjusts its exams over time, so Actual4Labs reviews and updates the Oracle Database 10g R2: Administering RAC question bank on a continuous basis to reflect the current skills being tested. Your purchase includes 365 days of free updates; after that, you can repurchase the expired product at a 50% discount from your member zone. To catch a fresh release, check the New Releases section on Actual4Labs, the status on your product's download page, or the Actual4Labs newsletter — and always look for an update a few days before your exam date.
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Ready when you are: download the free 1Z0-048 demo, pick the format that fits your routine, and start working through 150 practice questions today.
Question 1
Which three statements are correct regarding ASM instances in a RAC environment? (Choose three.)
A. ASM instances can mount different sets of disk groups.
B. ASM instances can use different values for ASM_POWER_LIMIT.
C. ASM instances must all have the same value for ASM DISKGROUPS.
D. ASM instances must all have the same value for ASM_DISKSTRING.
E. ASM instances recognize their disks by looking at their headers.
Question 2
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. CRS home directory (ORA_CRS_HOME)
C. group services directory (GSDJHOME)
D. Oracle inventory directory
E. NET_ADMIN directory
F. Oracle base directory (ORACLE_BASE)
Question 3
You are working as a DBA in a RAC environment that is available for testing. The RAC environment has all the database files stored in the OCFS file system. You plan to install ASM and move all the database files to ASM to achieve better performance. During the installation, you selected redundancy level as normal for the disk group being added. What is the reason for selecting this redundancy level?
A. You have three failure groups defined, so you want to use three-way mirroring.
B. You want to use hardware mirroring.
C. You do not want to have any mirroring in the disk group.
D. You have two failure groups defined, so you want to use two-way mirroring.
Question 4
Your storage administrator informs you about some disk corruption issues in the disk subsystem where your Oracle Cluster Registry (OCR) is located. Your storage administrator has resolved these corruption issues by applying a patch to the storage subsystem, but to be sure that the OCR is not affected by this problem the administrator wants you to check the integrity of the OCR. How would you do this?
A. You dump the OCR contents into a text file by using the OCRDUMP command, and if that succeeds without errors you know that your OCR is not corrupted.
B. You create a physical backup of the OCR by using the OCRCONFIG command, and if this succeeds without errors you know that the OCR is not corrupted.
C. You can check whether the OCR is not corrupted by using the OCRCHECK command.
D. You create a logical export from the OCR by using the OCRCONFIG command and analyze the export file for errors.
E. There is no easy way to check your OCR for corruptions.
Question 5
After a disk failure caused by a power outage, your CRS is unable to start up completely because all your OCR files are lost. Which commands would you use and in which order to redress this
situation?
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. 7,6,3,9.
B. 7,6,3,2,9.
C. 5,3,8.
D. 5,4,8.
E. 6,3,9.
F. 6,4,9.
G. 7,6,4,9.
Solutions:
| Question 1 Answer: A,B,E | Question 2 Answer: A,B,D,F | Question 3 Answer: D | Question 4 Answer: C | Question 5 Answer: A |
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