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How is Exadata Secure RDMA Fabric isolation used in X9M-2 with virtualization enabled?
Correct Answer:D
Explanation
Auto Service Request (ASR) on Exadata X9M automatically raises service requests for specific hardware failures that Oracle can remotely diagnose and resolve. RoCE network interface cards in storage servers, Cisco RoCE switches, the Cisco management switch, and power supplies in database servers all fall into this category. These components are critical to system operation and monitored by ASR. Other infrastructure components like individual disk drives or database server processors are not automatically escalated by ASR without Platinum Support enabled.
You have been asked by Oracle Support to check the firmware of the hard & flash disks in a storage server. Which cellcli command should you use to get this information?
Correct Answer:A
Explanation
When a storage disk fails and is reported as failed by the system, you must first get it physically replaced before attempting any recovery steps. Even though Enterprise Manager is monitoring the system, the immediate action is to request disk replacement. ASR might eventually create a support ticket, but without Platinum Support enabled, you cannot rely on automatic remote service. The disk must be physically replaced to restore redundancy and prevent further data loss risk.
Which statement is true about the Persistent Memory Commit Accelerator?
Correct Answer:B
Explanation
EXACLI is the command-line tool designed to execute scripts across multiple cells simultaneously in an Exadata environment. It distributes the commands to each storage cell and runs them in parallel. This is different from CELLCLI, which runs on individual cells only. DCLI can execute commands across multiple nodes but is typically used for database servers rather than storage cells. EXACLI is the correct method for running identical scripts on all storage servers at the same time.
For which four component failures on an X9M Database Machine does Auto Service Request (ASR) raise service requests?
Correct Answer:A, C, F, G
Explanation
The dbmcli command is used to set alerts on Exadata database servers. The correct syntax uses the set alert option to configure thresholds for various metrics including temperature. The ds_temp parameter refers to database server temperature, and you specify the threshold value. This command must be executed on each database server to apply the alert configuration. Other monitoring tools like CELLCLI are used for storage cells, not database servers.
You are planning the monitoring configuration for your Exadata X9M Database Machine.
Which three components are monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins?
Correct Answer:A, C, E
Explanation
The checkbadlinks.pl utility is specifically designed to verify network connectivity on Exadata systems. The all flag checks all network interfaces and paths. This tool validates that the client network is properly connected and functional through both client switches in a redundant configuration. This is the correct method to verify client network availability after upstream switch replacement. Other diagnostic tools may provide different information but this one specifically confirms link status.
Domain 1: Exadata Database Machine Architecture and Key Capabilities
Describe the hardware architecture including database server types, storage server types, power distribution, and network switches. Understand the software architecture, deployment scenarios, RDMA networking, and failure group configurations.
Domain 2: Exadata Database Machine Site and Implementation Planning (OECA&OEDA)
Describe the function of Oracle Exadata Configuration Assistant and Oracle Exadata Deployment Assistant; Design an Exadata Database Machine with Oracle ZFS Storage in a single rack using Oracle Exadata Configuration Assistant; Configure Exadata Database virtual deployment using Oracle Exadata Deployment Assistant; Add additional database server to a physical Exadata Database Machine using Oracle Exadata Deployment Assistant; Describe physical site requirements and safety best practices for implementing Exadata (site planning, cooling, power); Install and configure Oracle Exadata using Oracle Exadata Deployment Assistant
Domain 3: Exadata Database Machine Installation
Configure Exadata Database Server ILOM settings, handle rack receipt procedures, and verify storage server firmware. Set up Automatic Service Request and reconfigure power delivery options.
Domain 4: Exadata Database Machine Integration
Connect Exadata Database Servers to client networks and backup networks in various deployment scenarios. Manage network architecture including secure fabric and multirack configurations.
Domain 5: Exadata Database Machine Configuration and Administration
Create and manage Automatic Storage Management disk groups, configure software using CellCLI and DCLI tools. Back up databases, enable Flash Cache features, and manage virtual machines.
Recover from storage cell disk failures and manage disk replacements. Use Exadata software tools to diagnose and resolve client network connectivity issues.
Monitor database servers, storage servers, and networks using Cloud Control or DBMCLI command line tools. Understand Enterprise Manager discovery, ASR functions, and Oracle Configuration Manager integration.
Deploy software updates to Database Machine components without downtime. Use patchmgr to update individual storage servers and understand maintenance procedures.
Domain 10: Exadata Database Maintenance Tasks
Power Database Machine on and off; Safely shut down a single Exadata Storage Server; Replace a damaged physical disk on a cell; Replace a damaged flash card on a cell; Add additional storage to Exadata Database Servers; Use the Exadata Cell Software Rescue Procedure
FAQ
1Z0-902 Exam FAQ
Common questions about the exam itself
What background do I need before taking the 1Z0-902 exam?
The exam is aimed at database administrators, system engineers, and IT professionals with hands-on experience deploying and maintaining Oracle Exadata systems. You should be comfortable with Exadata architecture, the Oracle Exadata Deployment Assistant tool, and basic administration tasks like ASM disk group configuration and CellCLI commands.
How long should I spend preparing for 1Z0-902?
Most candidates with relevant Exadata experience spend two to three months preparing, combining online training courses with hands-on practice using the OECA and OEDA tools. The time varies significantly depending on your familiarity with Exadata hardware and software architecture.
Is the Exadata Database Machine Security domain the hardest part of 1Z0-902?
Many candidates find the security domain challenging because it covers multiple technologies like cellwall configuration, AIDE monitoring, and database-scoped security that are not commonly used in other Oracle environments. Spending dedicated time on secure boot procedures, ASM security options, and REST API access controls pays off during the exam.
What is the format of the 1Z0-902 exam?
The exam contains 60 questions delivered in multiple-choice format, with three answer options per question. You have 90 minutes to complete it, which gives roughly 1.5 minutes per question on average.
Can I retake the 1Z0-902 exam if I fail?
Yes, you can retake the exam, but Oracle typically requires a waiting period between attempts. Check the specific retake policy on your exam registration page or contact Oracle University support for the exact timeframe.
How does 1Z0-902 relate to other Oracle Exadata certifications?
The 1Z0-902 certification validates essentials for Oracle Exadata Database Machine X9M implementation, but Oracle may offer additional advanced certifications for deeper specialization in Exadata administration, tuning, and cloud deployments. Check Oracle University for the full certification track.
What does the 1Z0-902 certification tell employers?
This credential demonstrates that you can install, configure, monitor, and troubleshoot Oracle Exadata Database Machine X9M systems, making you a valuable resource for organizations running Exadata in their data centers or cloud environments.
Which Exadata tools are most important to master for the exam?
Focus on the Oracle Exadata Configuration Assistant for design, Oracle Exadata Deployment Assistant for installation and configuration, CellCLI for storage cell administration, and DCLI for command distribution across multiple Exadata nodes. Hands-on practice with these tools is essential.
How do I prepare for the Exadata Database Machine Site and Implementation Planning domain?
This domain requires understanding of the physical deployment process including site requirements, cooling, power distribution, and rack installation. Work through the OECA and OEDA workflows step-by-step, and review the physical site planning documentation to grasp rack configurations and multirack deployments.
Does the 1Z0-902 exam cover cloud-based Exadata deployments?
The exam focuses primarily on on-premises Exadata Database Machine X9M implementation, though it may touch on virtual deployment scenarios. If you need expertise in Exadata Cloud Service, that would be covered in more advanced or specialized certification paths.
