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To prepare for the Oracle 1z1-902 exam, candidates should have a good understanding of Oracle Exadata Database Machine X8M architecture and its components, such as database servers, storage servers, and InfiniBand switches. They should also have knowledge of Oracle database administration and management, including backup and recovery, performance tuning, and security. Candidates should also have experience in installing and configuring Exadata Database Machine X8M and be familiar with the tools and techniques used for troubleshooting common issues.

Oracle Exadata Database Machine X8M is a state-of-the-art platform that provides high performance, scalability, and reliability for Oracle database workloads. It is designed to handle mission-critical workloads and provides a range of features such as high-speed networking, flash storage, and advanced compression techniques. 1z1-902 Exam covers topics such as Exadata architecture, installation, configuration, monitoring, and maintenance.

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Oracle Exadata Database Machine X8M is a high-performance database machine that is optimized for running Oracle Database workloads. It provides a complete solution for database consolidation, in-memory processing, and storage optimization. The Exadata X8M system is designed to deliver high performance, scalability, and availability, and is ideal for mission-critical workloads. By earning the Oracle 1Z0-902 certification, professionals can demonstrate their expertise in implementing and managing Exadata X8M systems, and can advance their careers in the field of database administration and management.

Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q35-Q40):

NEW QUESTION # 35
Which statement is true about the patching features provided in Platinum Services?

A. The rolling and complete down time approaches are two options to patching.
B. Patching services are available for the full software stack up to twice per year.
C. Patching is done automatically during business hours.
D. Oracle Platinum Service covers Exadata storage software and firmware patching, but customers must perform the database patching.

Answer: B

Explanation:
Oracle Platinum Services provides patching features for the full software stack, which includes operating systems, virtualization, storage software and firmware, and databases. This service is typically performed up to twice per year, allowing customers to schedule the patching at their convenience. The patching is usually done to keep the software and firmware up-to-date and to fix any known security vulnerabilities. It's important to note that patching services are not done automatically during business hours, customer's involvement and schedule is needed, and the rolling and complete downtime approaches are options to minimize the impact on the system during patching.
The correct statement about the patching features provided in Platinum Services is that patching services are available for the full software stack up to twice per year. Oracle Platinum Service covers Exadata storage software and firmware patching, and customers must also perform the database patching. The rolling and complete down time approaches are two options for patching, and patching should be scheduled for times when the system is not being heavily used. Patching is not done automatically during business hours. This is covered in section 4.13 of the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources [1].
[1] https://docs.oracle.com/en/engineered-systems/exadata-database-machine/x9m/exad-implementing-database-machine-x9m.pdf Search results: [1] Oracle Exadata Storage Server Patching [1][2]. Oracle Exadata Storage Server patching is performed by a team of Oracle engineers [3][2], and includes the latest Oracle... [2] Patching and Upgrades. Oracle Database Machine provides automated patching and upgrades for the full Exadata software stack, up to twice a year, with... [3] Virtualized Exadata. Oracle Database Machine X9M-2 comes with a choice of two patching approaches to accommodate different customer needs: Rolling... [4] Jan 10, 2017 ... Exadata Patching Process. Oracle Exadata Storage Server patching is performed by a team of Oracle engineers [3][2], and includes the latest...

NEW QUESTION # 36
Assume that the RDBMS and ASM instances are up and you are enabling write-back flash cache in one cell server at a time.
Which step(s) should you perform before executing the following command you your Exadata X9M-8 Database Machine, which will set the cell flash cache mode to write-back?
#cellcli -e alter cell flashCacheMode=WriteBack

A. Drop the existing flash cache on the cell.
B. Disable the storage indexes on the cell.
C. Create a new flash cache on the cell.
D. Shut down the CELL5RV service on the cell.
E. Inactivate the grid disks on the cell.
F. Inactivate all the physical disks on the cell.

Answer: A,C

Explanation:
To enable the write-back flash cache on an Exadata X9M-8 storage cell, the existing flash cache must be removed before transitioning to a new mode. This is because the flash cache configuration-whether set to write-through or write-back-requires a re-initialization of the flash storage to apply the new caching behavior. The steps are as follows:
Drop the Existing Flash Cache: Before altering the cache mode, any existing flash cache on the cell must be dropped. This clears the existing configuration and allows the system to reallocate flash resources under the new mode. The command for this is:
# cellcli -e "drop flashcache"
Create a New Flash Cache in Write-Back Mode: After dropping the existing flash cache, you can create a new flash cache with write-back mode enabled. This step ensures that the flash cache is configured correctly to handle write operations before they reach disk, thus accelerating write-heavy workloads. The relevant command to set write-back mode is:
# cellcli -e "create flashcache all"
This process will reset the flash cache with the write-back mode enabled, thereby caching both read and write operations effectively.

NEW QUESTION # 37
Which two Exadata security features would you configure to control which databases can access which griddisks, when multiple databases share space on your storage servers in an unpartitioned storage grid?

A. Using EXADCLI instead of CELLCLI to create the griddisks
B. File permissions on the griddisks in each database server
C. Exadata storage realms using database-scoped security mode
D. File permissions on the griddisks in each storage server
E. Exadata storage realms using ASM-scoped security mode

Answer: A,D

NEW QUESTION # 38
You use Enterprise Manager to monitor all the components of your Exadata Database Machine.
Recently, you discovered that certain asmdisks were offline in one of the diskgroups used by the rac database called prod.
In which two sources would you find diagnostic messages related to this problem?

A. alert logs for Enterprise Manager
B. alert logs for the ASM instances
C. Enterprise Manager Alerts on the Exadata Storage Server Grid home page
D. Enterprise Manager Alerts on the ILOM home page for cell connectivity problems for the prod database instances
E. alert logs for the prod database instances

Answer: B,E

Explanation:
According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources, you can find diagnostic messages related to this problem in the alert logs for the ASM instances and the alert logs for the prod database instances. The alert logs for the ASM instances will provide information related to the offline asm disks, while the alert logs for the prod database instances will provide information related to whether the prod database instances are connected to the ASM instance or not.

NEW QUESTION # 39
An Exadata storage server physical disk on an X9M-2 high-capacity full rack entered the predictive failure state. Which two steps must you perform to replace this failed physical disk?

A. Create a new celldisk and new griddisks on the replaced physical disk.
B. Replace the failed physical disk.
C. Rebalance the data on the effected griddisks before performing a manual drop command.
D. Verify that the griddisks located on the physical disk have been successfully dropped from the associated ASM diskgroups.
E. Identify the griddisks located on the failed physical disk and drop them from the associated ASM diskgroups.
F. Add the griddisks back into the ASM diskgroup they used to be a member of.

Answer: B,E

Explanation:
Once the physical disk has been replaced, you will need to create a new celldisk and griddisks on the replaced physical disk. After the griddisks have been dropped from the associated ASM diskgroups, you can then add the griddisks back into the ASM diskgroup they used to be a member of and rebalance the data on the effected griddisks. Finally, you should verify that the griddisks located on the physical disk have been successfully dropped from the associated ASM diskgroups.

NEW QUESTION # 40
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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q35-Q40):

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