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The Oracle 1Z0-902 certification exam is an important step for IT professionals who want to validate their skills and knowledge in implementing and managing Oracle Exadata Database Machine X8M. This certification exam covers various topics related to Oracle Exadata Database Machine X8M and is designed to validate the skills required to implement and manage Oracle Exadata Database Machine X8M in a production environment.

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The 1Z0-902 exam covers a wide range of topics, including Exadata architecture, software installation and configuration, database migration, backup and recovery, performance tuning, and troubleshooting. Candidates are expected to have a deep understanding of Oracle databases and Exadata technology, as well as hands-on experience with installation, configuration, and maintenance of Exadata systems. Passing this exam will demonstrate their ability to implement and manage Exadata systems, and will help them advance their careers in the field of database administration.

To pass the Oracle 1z1-902 exam, candidates must have a strong understanding of the Oracle Exadata Database Machine X8M architecture, configuration, and management. They must also be proficient in implementing and managing key features, such as Smart Scan, Smart Flash Cache, and Hybrid Columnar Compression. Additionally, candidates must have a solid understanding of database administration and performance tuning concepts, as well as experience in using Oracle Enterprise Manager to manage and monitor the Oracle Exadata Database Machine X8M. With the Oracle 1z1-902 certification, IT professionals can demonstrate their expertise in implementing and managing this powerful technology, and gain a competitive advantage in the job market.

Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q58-Q63):

NEW QUESTION # 58
You are hardening the security posture of your Exadata Database Machine. Before disabling ssh access to the storage servers, what should you do to enable REST access to the MS process?

A. Install Oracle Rest Data Services on each Storage server and install the MS APEX application.
B. The MS Process on the storage servers is natively endowed with REST services, but are not enabled by default.
C. The MS Process on the storage servers is natively endowed with REST services and are enabled by default, however, appropriate roles and users should be created to ensure security.
D. Install Oracle Rest Data Services on each Database server and install the MS APEX application.

Answer: C

NEW QUESTION # 59
How do ASM failure groups provide redundancy?

A. Failure groups are created for each grid disk to ensure mirror copies are written to the same storage server for faster recovery after a physical disk failure.
B. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
C. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
D. Extended Redundancy mirrors data across data centers providing the highest levels of data protection.

Answer: C

NEW QUESTION # 60
You are hardening the security posture of your Exadata Database Machine. Before disabling ssh access to the storage servers, what should you do to enable REST access to the MS process?

A. The MS Process on the storage servers is natively endowed with REST services and are enabled by default, however, appropriate roles and users should be created to ensure security.
B. Install Oracle Rest Data Services on each Storage server and install the MS APEX application.
C. The MS Process on the storage servers is natively endowed with REST services, but are not enabled by default.
D. Install Oracle Rest Data Services on each Database server and install the MS APEX application.

Answer: C

Explanation:
To enable REST access to the MS process, you need to manually enable the REST services on each storage server by running the command cellcli -e "ALTER CELL ENABLE REST" and then configure authentication and authorization to ensure secure access. This is described in detail in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (Chapter 8, Securing the Exadata Database Machine).
https://docs.oracle.com/en/cloud/paas/exadata-cloud/csexa/access-rest-api.html

NEW QUESTION # 61
What are two recommended configuration best practices for backup and recovery on Exadata?

A. Placing the backup network on dedicated switches installed in the top of the rack (ToR) has the benefits of isolating the backup network from other workloads and providing a greater level of control.
B. The internal Recovery Appliance backup and restore processing is optimized when the RMAN FILESPERSET parameter is set to 1 for the level 1 incremental backup set.
C. When off-site long-term backup retention is needed, use Oracle Database Backup Cloud Service as a low-cost, offsite scalable storage for a disaster recovery solution.
D. Even if the backup was limited to writing to four tape drives, eight channels could be specified to expedite the restore process.

Answer: A,B

Explanation:
A recommended configuration best practice for backup and recovery on Exadata is to place the backup network on dedicated switches installed in the top of the rack (ToR). This provides a greater level of control and isolates the backup network from other workloads. Additionally, even if the backup is limited to writing to four tape drives, it is recommended to specify eight channels to expedite the restore process.
Another best practice is to set the RMAN FILESPERSET parameter to 1 for the level 1 incremental backup set. This will optimize the internal Recovery Appliance backup and restore processing. Finally, if off-site long-term backup retention is needed, Oracle Database Backup Cloud Service should be used as a low-cost, offsite scalable storage solution for a disaster recovery solution.

NEW QUESTION # 62
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?

A. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers
B. ASM instances
C. Oracle clusterware on the database server
D. the RDMA over Converged Ethernet (RoCE) switches
E. the storage server ILOM
F. the Power Distribution Units (PDUs)

Answer: A,B,C

Explanation:
Exadata-specific Enterprise Manager Plug-Ins are used to monitor different components of the Exadata Database Machine.
1. ASM instances: The Automatic Storage Management (ASM) instances can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the storage space, disk usage, and performance of the ASM instances.
2. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers: The HCC ratios on Extended (XT) storage servers can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the compression ratios and performance of the storage servers.
3. Oracle clusterware on the database server: The Oracle clusterware on the database server can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the health and performance of the clusterware.

NEW QUESTION # 63
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