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Oracle Exadata Database Machine X8M is a high-performance database machine that is designed to deliver extreme performance for database workloads. The machine combines the performance of flash memory with the scalability of a shared storage architecture to deliver unmatched performance for Oracle Database workloads. The machine is designed to handle the most demanding workloads and is optimized for both OLTP and data warehousing workloads. With its unique architecture and advanced features, the Exadata Database Machine X8M is a game-changer in the world of database systems.
Oracle Exadata Database Machine X8M Implementation Essentials Exam, also known as the Oracle 1Z0-902 Exam, is a certification exam designed for IT professionals who want to validate their skills and knowledge in implementing and managing Oracle Exadata Database Machine X8M solutions. The Oracle Exadata Database Machine X8M is an integrated platform that combines hardware and software components to deliver high-performance and scalable database solutions.
Oracle Exadata Database Machine X8M is a high-performance, scalable database system designed to meet the demands of modern businesses. It combines hardware and software designed specifically for Oracle Database workloads, and is optimized for use with Oracle Cloud Infrastructure. With the Oracle 1z1-902 certification, professionals can demonstrate their ability to implement and manage this powerful database system, and gain recognition for their expertise in this area.
NEW QUESTION # 27
Which two quarantine types can disable Smart Scan for multiple databases that offload SQL statements to a cell on an Exadata Database Machine?
- A. SQL Plan Quarantine
- B. Cell Offload Quarantine
- C. Disk Region Quarantine
- D. Manually created Quarantine
- E. Database Quarantine
Answer: A,B
Explanation:
A and E are the two correct quarantine types that can disable Smart Scan for multiple databases that offload SQL statements to a cell on an Exadata Database Machine. A is correct because SQL Plan Quarantine will disable Smart Scan for all queries related to the SQL plan that was placed in the SQL Plan Quarantine [1]. E is correct because the Cell Offload Quarantine will disable Smart Scan for all queries offloaded to Oracle Database Exadata Storage Server Software [2]. The other statements (B, C, and D) are incorrect.
[1] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book , Chapter 13 [1][2]: Oracle Database Exadata Storage Server Software [2] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book , Chapter 15 [1][2]: Oracle Database Exadata Storage Server Configuration
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/sagug/exadata-storage-server-software-introduction.html
NEW QUESTION # 28
How is Exadata Secure RDMA Fabric isolation used in X9M-2 with virtualization enabled?
- A. With Secure Fabric isolation, each Database VM cluster uses a dedicated network partition and VLAN ID for cluster networking between the database servers in the VM Cluster. This provides security and isolation between multiple tenants or VM clusters.
- B. With Secure Fabric isolation, each Database VM Guest uses a dedicated network partition and VLAN ID for client networking between application servers. This improves security by preventing man in the middle attacks.
- C. With Secure Fabric isolation, each Database VM Cluster uses a dedicated network partition and VLAN ID for Data Guard networking between the primary and disaster recovery Exadata racks. This improves security by isolating data guard traffic onto an encrypted network between data centers.
- D. With Secure Fabric isolation, each Storage Server runs multiple KVM guests each dedicated to a Database VM cluster using a dedicated network partition and VLAN ID. This provides security and isolation between multiple tenants or VM clusters.
Answer: A
NEW QUESTION # 29
Which two options can be used to identify a damaged or failing flash card on an X9M-2 Database Machine High Capacity storage server?
- A. using the CELLCLI CALIBRATE command on the storage server after logging in as the celladmin user
- B. hardware monitoring using the storage server ILOM
- C. using the CELLCLI CALIBRATE command on the storage server after logging in as the root user
- D. using the CELLCLI list LUN DETAIL command as the celladmin user
Answer: A,B
Explanation:
The CELLCLI CALIBRATE command can be used to check the health of all flash cards in the storage server, and it should be run after logging in as the celladmin user. The hardware monitoring using the storage server ILOM should also be used to check for errors and other potential issues with the flash cards. The CELLCLI list LUN DETAIL command should not be used to identify a damaged or failing flash card, since it will not provide any information about the health of the flash card.
NEW QUESTION # 30
Which two options can be used to identify a damaged or failing flash card on an X9M-2 Database Machine High Capacity storage server?
- A. hardware monitoring using the storage server ILOM
- B. using the CELLCLI CALIBRATE command on the storage server after logging in as the root user
- C. using the CELLCLI CALIBRATE command on the storage server after logging in as the celladmin user
- D. using the CELLCLI list LUN DETAIL command as the celladmin user
Answer: A,D
NEW QUESTION # 31
Which statement is true about the Persistent Memory Commit Accelerator?
- A. Persistent Memory Commit Accelerator copies redo log data from disk for faster redo apply on Data Guard Standby Databases.
- B. Persistent Memory Commit Accelerator reduces redo log write latency by using Persistent Memory and RDMA before flushing to Flash then disk.
- C. Persistent Memory Commit Accelerator contains logging information from all tiers of the software stack for rapid triage and diagnostics.
- D. Persistent Memory Commit Accelerator tracks changes to Persistent Memory Data Accelerator to ensure duplicate blocks are not written to Flash.
- E. Persistent Memory Commit Accelerator helps to further reduce redo log write latency by using Persistent Memory and Remote Direct Memory Access (RDMA).
Answer: E
Explanation:
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmso/new-features-exadata-system-software-release-23.html
NEW QUESTION # 32
You must drop all celldisks on all the storage servers in an X9M-2 quarter rack as part of a reconfiguration project.
Which three statements describe the account on the storage servers which you should use and the tool that may be used to drop the celldisks?
- A. to an administrator-created storage server user with appropriate privileges on celldisk objects by calling EXACLI on all cells using exadcli
- B. to the CELLADMIN account by calling CELLCLI on all cells using DCLI
- C. to the CELLMONITOR account using cellcli interactively on each storage server
- D. to the CELLMONITOR account calling CELLCLI on all cells using DCLI
- E. to an administrator-created storage server user with appropriate privileges on celldisk objects by calling CELLCLI on all cells using exadcli
- F. to the CELLADMIN account using cellcli interactively on each storage server
Answer: C,D,E
NEW QUESTION # 33
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. CellCLI alter GRIDDISK all inactive on the affected storage server
- B. CeLLCLI> list GRIDDISK where status != 'inactive' on the affected storage server
- C. CeLLCLI> alter cell shutdown SERVICES all on the affected storage server
- D. shutdown -h now' on the affected storage server
- E. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server
- F. 'crsct1 stop cluster -all' on one of the database servers
Answer: A,D
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].
NEW QUESTION # 34
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?
- A. list devices attributes name, deviceName, diskType, physicalFirmware
- B. list celldisk attributes name, deviceName, diskType, physicalFirmware
- C. list physicaldisk attributes name, deviceName, diskType, physicalFirmware
- D. list cell attributes name, deviceName, diskType, physicalFirmware
Answer: C
Explanation:
This command will display the name, deviceName, diskType and physicalFirmware attributes of the physicaldisks in a storage server, as explained in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 85).
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/sagug/exadata-storage-server-cellcli.html
NEW QUESTION # 35
Which two quarantine types can disable Smart Scan for multiple databases that offload SQL statements to a cell on an Exadata Database Machine?
- A. Cell Offload Quarantine
- B. SQL Plan Quarantine
- C. Database Quarantine
- D. Disk Region Quarantine
- E. Manually created Quarantine
Answer: B,C
NEW QUESTION # 36
Which three of the following options are available for database consolidation on Exadata?
- A. Multiple Databases on a cluster
- B. A single database with one or more schema per application
- C. Multiple databases spanning a Bare Metal and Virtual Machine cluster to provide resource isolation and consolidation concurrently
- D. Multiple pluggable databases in one or more container databases on a Virtual Machine or Bare Metal cluster
- E. Multiple Virtual Machine clusters supporting a single database for greatest resource isolation
- F. Bare Metal deployment with one database per database server
Answer: A,B,D
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 # 37
Which are three customer options for hosting the Platinum Services Advanced Support Gateway?
- A. Provide individual x86 64-Bit gateway hardware.
- B. Purchase the recommended x86 64-Bit gateway hardware from Oracle.
- C. Install on Exadata Engineered System.
- D. Install in Oracle Virtual Machine with required hardware.
- E. Install on Oracle Database Appliance.
Answer: C,D,E
Explanation:
The Platinum Services Advanced Support Gateway is a component of Oracle's Platinum Services offering that enables customers to access advanced support features and tools, such as automated problem diagnosis and resolution. Customers have the option to host the Advanced Support Gateway on an Oracle Database Appliance, Oracle Virtual Machine with required hardware, or an Exadata Engineered System. These options allow customers to leverage existing infrastructure and resources to host the gateway, rather than needing to purchase and install new hardware. Providing individual x86 64-Bit gateway hardware or purchase the recommended x86 64-Bit gateway hardware from Oracle are also options but it depends on the customer's infrastructure and resources.
NEW QUESTION # 38
You are concerned about the operating temperature of the database servers in your Exadata Full Rack and want to be alerted if the server exceeds 30C.
What command should use use to generate alerts for such an event?
- A. dbmcli -e "set alert ds_temp> 30" on each database server
- B. dbmcli -e "alert metriccurrent ds_temp where metricValue > 30" on each database server
- C. dbmcli -e "set threshold ds_temp comparison=' >', critical=30" on each database server
- D. dbmcli -e "create threshold ds_temp comparison='>', critical=30" on each database server
Answer: D
Explanation:
According to Oracle's documentation1, to set a threshold for a metric on a database server, you need to use the create threshold command with the appropriate parameters. The set threshold command is used to modify an existing threshold2.
Therefore, the command that you should use to generate alerts for such an event is:
dbmcli -e "create threshold ds_temp comparison='>', critical=30" on each database server1
NEW QUESTION # 39
For which four component failures on an X9M Database Machine does Auto Service Request (ASR) raise service requests?
- A. Cisco RDMA over Converged Ethernet (RoCE) switches
- B. Cisco management switch
- C. RoCE network interface cards in the database servers
- D. power distribution units
- E. RoCE network interface cards in the storage servers
- F. power supplies in the database servers
- G. fans in the storage servers
Answer: A,D,E,F
Explanation:
According to the Oracle Auto Service Request (ASR) documentation1, ASR raises service requests for qualified Oracle products that are detected with specific faults. The qualified Exadata products include2:
Database servers
Storage servers
InfiniBand switches
Cisco switches (X8M and later systems)
Power distribution units (PDUs)
NEW QUESTION # 40
Which four actions should you take before proceeding with applying updates to your Exadata Database Machine?
- A. Run the appropriate patchmgr preqequisite check step for each component being updated.
- B. Run patchmgr --all_comp -autofix -autobackup -upgrade -rolling.
- C. Check the Exadata Critical Issues My Oracle Support note 1270094.1 for any issues not added to the latest version of exachk.
- D. For database servers, perform a server backup using patchmgr -dbnodes db_list_file -backup -rolling.
- E. Run exachk and resolve only WARNINGS that you have not seen before.
- F. Consult My Oracle Support note 888828.1 to determine the current recommended Exadata software release.
Answer: A,C,D,F
Explanation:
For database servers, perform a server backup using patchmgr -dbnodes dblistfile -backup -rolling. This is according to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book . The other statement is false as exachk should not be used to resolve warnings or errors [1], but rather to identify them so that they can be addressed. Additionally, patchmgr should not be used with the --autofix, --autobackup, --upgrade, or --rolling flags as this could cause unexpected issues.
NEW QUESTION # 41
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. 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 - 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. OS I/O metrics using Enterprise Manager host pages for the storage servers
- E. OS I/O metrics using OS tools such as iostat on the storage servers
Answer: B,C
NEW QUESTION # 42
A new Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA PDUs is being installed in a Data Center. However, the Data Center is only providing enough power for a single cable from each PDU.
Which statement is correct?
- A. A splitter cable can be used to provide power to all PDU cables.
- B. The installation cannot proceed until two power feeds are available per PDU.
- C. The installation can go ahead, no change is required.
- D. The power cables from the servers to the PDUs can be rearranged inside the rack following OECA guidance to utilize a single PDU power cable.
Answer: D
NEW QUESTION # 43
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 Database 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 Storage server and install the MS APEX application.
Answer: A
Explanation:
The MS process on Exadata storage servers is natively endowed with REST services and these services are enabled by default. However, it is important to create appropriate roles and users to ensure security when accessing these services. This way, it is possible to disable ssh access to the storage servers, and still enable REST access to the MS process. It's not necessary to install Oracle Rest Data Services on each Database or Storage server or install the MS APEX application, the MS process on the storage servers already have REST services by default.
NEW QUESTION # 44
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