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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.

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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q81-Q86):

NEW QUESTION # 81
Examine these commands:
1. Execute "crscti stop cluster -all" as the grid user from one database server.
2. Execute "crscti stop cluster -all" as root from one database server.
3. Power off all network switches.
4. Execute "crscti stop cluster" as root from one database server.
5. Execute "crscti stop cluster" as the grid user from one database server.
6. Power off the rack using the power switches on the PDUs.
7. Execute "shutdown -h now" on all database servers.
8. Execute "shutdown -h now" on all Exadata storage servers.
Which is the correct order or the required commands to completely power off an Exadata Database Machine in an orderly fashion?

A. 1, 8, 7, 3 and 6
B. 4, 7, 8, 3, and 6
C. 5, 8, 7, and 6
D. 2, 7, 8, and 6
E. 2, 8, 7, 3, and 6

Answer: D

NEW QUESTION # 82
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 Enterprise Manager host pages for the storage servers
B. 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
C. OS I/O metrics using OS tools such as iostat on the database servers
D. cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk
E. OS I/O metrics using OS tools such as iostat on the storage servers

Answer: C,D

Explanation:
The two monitoring tools that might be useful in examining I/O performance for the prod database are:
OS I/O metrics using OS tools such as iostat on the database servers.
cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk.
The Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book states that "I/O metrics can be collected from the database server using OS tools such as iostat [1], as well as from the storage servers using cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk". It also suggests using Enterprise Manager host pages for the storage servers to view OS I/O metrics.

NEW QUESTION # 83
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. Bare Metal deployment with one database per database server
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. A single database with one or more schema per application

Answer: D,E,F

Explanation:
According to Oracle.com documents or resources, the three options that are available for database consolidation on Exadata are:
1. Multiple pluggable databases in one or more container databases on a Virtual Machine or Bare Metal cluster123.
2. A single database with one or more schema per application12.
3. Multiple Databases on a cluster12.
https://blogs.oracle.com/exadata/post/database-consolidation-why-and-how

NEW QUESTION # 84
You have been tasked with replacing a memory module of an Exadata Storage Server and need to power off the affected storage server. Which two commands must you execute to safely power off the storage server in an Exadata X9M Database Machine?

A. shutdown -h now' on the affected storage server
B. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server
C. CeLLCLI> list GRIDDISK where status != 'inactive' on the affected storage server
D. 'crsct1 stop cluster -all' on one of the database servers
E. CellCLI alter GRIDDISK all inactive on the affected storage server
F. CeLLCLI> alter cell shutdown SERVICES all on the affected storage server

Answer: A,E

Explanation:
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmmn/maintaining-exadata-storage-servers.html#GUID-AE16A1DA-53C6-4E80-94E5-963AA65373AB The two commands that must be executed to safely power off the storage server in an Exadata X9M Database Machine are E and F.
Command E, CellCLI alter GRIDDISK all inactive, will deactivate all of the GRIDDISKS on the affected storage server. This will ensure that no data is lost during the power-off process.
Command F, shutdown -h now, will shut down the storage server. This will ensure that the storage server is completely powered off and no data is lost.
For more information on how to properly power off an Exadata Storage Server, refer to the Oracle Exadata Database Machine X9M Implementation Essentials official text book and resources [1][2].
https://support.oracle.com/knowledge/Oracle%20Database%20Products/1188080_1.html

NEW QUESTION # 85
Which are three customer options for hosting the Platinum Services Advanced Support Gateway?

A. Install on Oracle Database Appliance.
B. Install on Exadata Engineered System.
C. Install in Oracle Virtual Machine with required hardware.
D. Purchase the recommended x86 64-Bit gateway hardware from Oracle.
E. Provide individual x86 64-Bit gateway hardware.

Answer: A,D,E

Explanation:
According to Oracle's documentation1, the customer options for hosting the Platinum Services Advanced Support Gateway are:
Provide individual x86 64-Bit gateway hardware1
Purchase the recommended x86 64-Bit gateway hardware from Oracle1
Install on Oracle Database Appliance2

NEW QUESTION # 86
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