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Oracle 1Z0-902 exam is an important certification for professionals who work with the Oracle Exadata Database Machine X8M. By passing 1z1-902 Exam, candidates can demonstrate their expertise in this technology and enhance their career opportunities in the field of database management.

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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q59-Q64):

NEW QUESTION # 59
I/O performance of the prod database on your Exadata Database Machine has degraded slightly over the past month. The database has been allocated to the OLTP I/O Resource Management (IORM) category.
Which two monitoring tools might be useful in examining I/O performance for the prod database?

A. OS I/O metrics using OS tools such as iostat on the storage servers
B. OS I/O metrics using OS tools such as iostat on the database servers
C. cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk
D. I/O-specific dynamic performance views such as v$iostat_fiie, v$iostat_function, and v$iostat_consumer_group from the prod
database instances using SQL *p1us
E. OS I/O metrics using Enterprise Manager host pages for the storage servers

Answer: B,C

NEW QUESTION # 60
Your system administrator reports an amber, non-blinking light on one of your Exadata storage disks. You immediately execute the 'list physicaldisk where diskType=HardDisk and status=failed DETAIL' command on the Exadata storage system and the specified disk is indeed reported as failed. Platinum Support has not been enabled for this system. Enterprise Manager Cloud Control is monitoring the system.
What is the next step that you should perform before you do anything else?

A. Wait for a blue light to appear on the disk if the rebalance operation is running.
B. Download and run the latest exadiag tool.
C. Ask the system administrator to replace the broken disk with a spare.
D. Wait for the email of the failure that Exadata or Enterprise Manager will send.
E. Check the database to see if any rebalance operations are active.
F. Call Oracle Support and make an appointment so that the drive can be replaced.

Answer: F

Explanation:
According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1], before doing anything else you should call Oracle Support and make an appointment so that the drive can be replaced. If Platinum Support is enabled, then you can call Oracle Support and they will arrange for the disk to be replaced. If Platinum Support is not enabled, then you can arrange for the disk to be replaced through Enterprise Manager Cloud Control.

NEW QUESTION # 61
How do ASM failure groups provide redundancy?

A. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
B. 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.
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: B

Explanation:
Failure groups provide redundancy in Oracle Exadata Database Machine X9M by ensuring that mirror copies of the data are written to different storage servers [1][2]. This prevents the potential for mirror copies to be written to the same server, which would cause a data loss if that server were to experience a physical disk failure. Furthermore, failure groups help to ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster, providing an extra layer of data protection. Additionally, Extended Redundancy mirrors data across data centers, providing the highest levels of data protection. Reference: Oracle Exadata Database Machine X9M Implementation Essentials [1][2], Chapter 5: Configuring Oracle ASM.

NEW QUESTION # 62
Which three of the following options are available for database consolidation on Exadata?

A. Multiple databases spanning a Bare Metal and Virtual Machine cluster to provide resource isolation and consolidation concurrently
B. A single database with one or more schema per application
C. Multiple Virtual Machine clusters supporting a single database for greatest resource isolation
D. Multiple Databases on a cluster
E. Multiple pluggable databases in one or more container databases on a Virtual Machine or Bare Metal cluster
F. Bare Metal deployment with one database per database server

Answer: C,D,E

NEW QUESTION # 63
Which two statements are true about Auto Service Request (ASR) with an Exadata Database Machine?

A. ASR Manager opens a service request (SR) automatically after sensors detect hardware faults.
B. ASR Manager must be installed and configured on one of the database servers.
C. Configuring ASR is mandatory for all Database Machine assets.
D. ASR Manager must be installed and configured on a dedicated server external to the Database Machine.
E. ASR communicates with Oracle support services using HTTPS.
F. ASR can upload configuration metadata to support problem resolution.

Answer: D,E

Explanation:
A and F are true statements about Auto Service Request (ASR) with an Exadata Database Machine [1][2]. In order to use the ASR feature, ASR Manager must be installed and configured on a dedicated server which is external to the Database Machine, and it communicates with Oracle support services using HTTPS. Additionally, ASR can upload configuration metadata to support problem resolution, and it can open a service request (SR) automatically after sensors detect hardware faults.
Reference for this information can be found in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources [1][2].

NEW QUESTION # 64
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