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NEW QUESTION # 28
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. Extended Redundancy mirrors data across data centers providing the highest levels of data protection.
• C. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
• D. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.

Answer: A

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 # 29
For which four component failures on an X9M Database Machine does Auto Service Request (ASR) raise service requests?

• A. Cisco management switch
• B. power distribution units
• C. RoCE network interface cards in the database servers
• D. power supplies in the database servers
• E. Cisco RDMA over Converged Ethernet (RoCE) switches
• F. RoCE network interface cards in the storage servers
• G. fans in the storage servers

Answer: B,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 # 30
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 the CELLMONITOR account using cellcli interactively on each storage server
• B. to the CELLADMIN account by calling CELLCLI on all cells using DCLI
• C. to the CELLADMIN account using cellcli interactively on each storage server
• D. to an administrator-created storage server user with appropriate privileges on celldisk objects by calling CELLCLI on all cells using exadcli
• E. to an administrator-created storage server user with appropriate privileges on celldisk objects by calling EXACLI on all cells using exadcli
• F. to the CELLMONITOR account calling CELLCLI on all cells using DCLI

Answer: A,D,F

NEW QUESTION # 31
Which three statements are true about Oracle Configuration Manager (OCM) for an Exadata Database Machine?

• A. Collected configuration information can be uploaded automatically to Oracle.
• B. It is mandatory to install OCM on all database servers.
• C. It collects configuration information on demand.
• D. It is mandatory to install OCM on at least one database server.
• E. It collects configuration information automatically.
• F. Collected configuration information can be uploaded manually to Oracle.

Answer: B,D,F

Explanation:
According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources, OCM is mandatory to install on at least one database server and can be used to collect configuration information on demand. The collected information can then be uploaded either manually or automatically to Oracle.

NEW QUESTION # 32
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. 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.
• B. A splitter cable can be used to provide power to all PDU cables.
• C. The installation cannot proceed until two power feeds are available per PDU.
• D. The installation can go ahead, no change is required.

Answer: C

Explanation:
An Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA PDUs would typically require two power feeds per PDU, one for each of the two power distribution units (PDUs) in the rack. A single power feed per PDU is not sufficient to provide the necessary power to the servers and storage in the rack.
The installation cannot proceed until two power feeds are available per PDU. According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], it is recommended that each PDU should have at least two power feeds from different power sources in the data center. This is to ensure redundancy and avoid any power interruption due to power failure on one of the power sources. Splitter cables are not recommended, as they can reduce efficiency and increase the risk of overheating. Rearranging the power cables within the rack is not recommended either, as it does not provide the necessary redundancy for the PDU.

NEW QUESTION # 33
Which two statements are correct about adding an additional database server to a physical Exadata X9M Database Machine using Oracle Exadata Deployment Assistant (OEDA)?

• A. Do not proceed if the OEDA Validate Configuration File step displays an error message about missing files p6880880.zip.
• B. The applyElasticConfig.sh script performs network configuration for the new servers. The new servers are restarted at the end of the process.
• C. Executing /opt/oracle.supportTools/reclaimdisks.sh -free -reclaim on each Exadata X9M Database server is required to reclaim disk space and perform partition reconfiguration.
• D. It is required to install OEDA on the first new database server.
• E. In order to configure the servers with Oracle Exadata Deployment Assistant (OEDA), the new server information must be entered in OEDA, and the configuration file must contain existing nodes.

Answer: B,C

Explanation:
The execute /opt/oracle.supportTools/reclaimdisks.sh -free -reclaim on each Exadata X9M Database server is required to reclaim disk space and perform partition reconfiguration.
The applyElasticConfig.sh script performs network configuration for the new servers. The new servers are restarted at the end of the process.

NEW QUESTION # 34
You have been asked to design a backup solution for an Exadata X9M-2 Quarter Rack with Extreme Flash Storage Servers connected to a new ZFS Storage Appliance ZS7 with 2 Storage Controllers with 100Gb Ethernet cards and 3 Storage Trays. You are using Oracle Exadata Configuration Assistant to validate the rack layout.
1. Use "Add Equipment" to add the Exadata X9M EF Storage Servers, starting from RU10.
2. Use drop down to add ZFS Storage Appliance Controllers.
3. You cannot add ZFS Storage Appliance to an Exadata Rack.
4. Use "Add Equipment" to add the ZFS Storage Trays, starting from RU1.
5. Use drop down to add ZFS Storage Trays.
6. Use "Add Equipment" to add the Exadata X9M Database Servers, starting from RU16.
7. Use "Add Equipment" to add the Exadata X9M EF Storage Servers, starting from RU1.
8. Use drop down to add Exadata X9M EF Storage Servers.
9. Use "Add Equipment" to add the ZFS Storage Controllers, starting from RU27.
10. Use drop down to add Exadata X9M Database Servers.
11. Use "Add Equipment" to add the ZFS Storage Trays, starting from RU31.
Which of these steps are correct and what is their correct order?

• A. 7,6,9,11
• B. 0
• C. 10, 8, 9, 11
• D. 44, 6, 9
• E. 10, 8, 2, 5

Answer: C

NEW QUESTION # 35
Which two statements are true about enabling write-back flash cache?

• A. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
• B. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
• C. Before write-back flash cache is enabled, you need to drop the Flash Cache first.
• D. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
• E. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.

Answer: B,C

NEW QUESTION # 36
Which four actions should you take before proceeding with applying updates to your Exadata Database Machine?

• A. Run patchmgr --all_comp -autofix -autobackup -upgrade -rolling.
• B. Run the appropriate patchmgr preqequisite check step for each component being updated.
• 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: B,C,D,F

NEW QUESTION # 37
You have been asked to investigate why an Exadata Database Server stopped communicating on the client network for 10 minutes over the past weekend.
Which command would help investigate this?

• A. # /opt/oracle.SupportTools/ibdiagtools/netcheck/runDiagnostics.pm -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
• B. $ ${ORACLE_HOME}/suptools/tfa/release/tfa_home/bin/tfact1 -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
• C. # /opt/oracle.ExaWatcher/GetExaWatcherResults.sh -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
• D. # /opt/oracle.SupportTools/exachk/exachk -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00

Answer: A

NEW QUESTION # 38
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,C

Explanation:
According to the Oracle Exadata Database Machine documentation12, two recommended configuration best practices for backup and recovery on Exadata are:
1. 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.
2. 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.

NEW QUESTION # 39
You have been notified by your Network Administrator that an upstream switch has been replaced due to a hardware fault. Which command verifies that the client network on your Exadata X9M-2 Database Server is available via both client switches?

• A. cat /proc/net/bonding/bondeth0
• B. ifconfig -a legrep "re0| re1"
• C. /opt/oracle.SupportTools/ibdiagtools/checkbadlinks.p1 -all
• D. netstat -rn

Answer: A

Explanation:
According to Oracle's documentation1, the client network on Exadata X9M-2 Database Server is used for client access to the database servers using Single Client Access Name (SCAN) and Oracle RAC Virtual IP (VIP) addresses. To verify that the client network is available via both client switches, you can use the command:
cat /proc/net/bonding/bondeth0
This command displays information about the bondeth0 interface, which is used for the client network on Exadata X9M-2 Database Server2. You can check if both interfaces (eth0 and eth1) are active and connected to different switches3.

NEW QUESTION # 40
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. Oracle Platinum Service covers Exadata storage software and firmware patching, but customers must perform the database patching.
• C. Patching is done automatically during business hours.
• D. Patching services are available for the full software stack up to twice per year.

Answer: D

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 # 41
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. Manually created Quarantine
• C. Cell Offload Quarantine
• D. Database Quarantine
• E. Disk Region Quarantine

Answer: A,C

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

NEW QUESTION # 42
You have been notified by your Network Administrator that an upstream switch has been replaced due to a hardware fault. Which command verifies that the client network on your Exadata X9M-2 Database Server is available via both client switches?

• A. /opt/oracle.SupportTools/ibdiagtools/checkbadlinks.p1 -all
• B. cat /proc/net/bonding/bondeth0
• C. ifconfig -a legrep "re0| re1"
• D. netstat -rn

Answer: A

Explanation:
The checkbadlinks.pl script is a tool provided with the Exadata X9M-2 Database Server that allows you to verify the status of the InfiniBand links between the Database Server and the client switches. This script checks for bad links, and it can be used to identify any issues with the client network connectivity. To use the script, you can navigate to the directory where it is located, which is /opt/oracle.SupportTools/ibdiagtools/ and execute the command ./checkbadlinks.pl -all. This will give you a summary of the status of the links and it will indicate if there are any bad links. This command will check the client network on your Exadata X9M-2 Database Server is available via both client switches. Other commands like ifconfig, netstat and cat are not relevant to check the client network on Exadata X9M-2 Database Server

NEW QUESTION # 43
Which statement is true about the Persistent Memory Commit Accelerator?

• A. Persistent Memory Commit Accelerator reduces redo log write latency by using Persistent Memory and RDMA before flushing to Flash then disk.
• B. Persistent Memory Commit Accelerator contains logging information from all tiers of the software stack for rapid triage and diagnostics.
• C. Persistent Memory Commit Accelerator helps to further reduce redo log write latency by using Persistent Memory and Remote Direct Memory Access (RDMA).
• 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 copies redo log data from disk for faster redo apply on Data Guard Standby Databases.

Answer: C

NEW QUESTION # 44
Which two statements are true about enabling write-back flash cache?

• A. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
• B. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
• C. Before write-back flash cache is enabled, you need to drop the Flash Cache first.
• D. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
• E. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.

Answer: A,C

Explanation:
According to the Oracle documentation1, two statements that are true about enabling write-back flash cache are:
Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations (A). This is because write-back flash cache provides better performance and reliability for data file writes than write-through flash cache.
Before write-back flash cache is enabled, you need to drop the Flash Cache first (D). This is because changing the flash cache mode requires recreating the flash cache with a different configuration.

NEW QUESTION # 45
Which two statements are true for the Oracle Exadata Configuration Assistant (OECA)?

• A. OECA allows one XT storage server in the configuration.
• B. OECA reconfigures the size of disk groups and recreates grid disks.
• C. OECA facilitates PDU power selection initially and after equipment addition.
• D. OECA extends the hardware for the elastic configuration only.
• E. OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.

Answer: B,E

Explanation:
The correct answers are Options A and D. Option A is correct because OECA reconfigures the size of disk groups and recreates grid disks. Option D is correct because OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.

NEW QUESTION # 46
Which two statements are true about Auto Service Request (ASR) with an Exadata Database Machine?

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

Answer: C,D

Explanation:
1. ASR can upload configuration metadata to support problem resolution1.
2. ASR Manager opens a service request (SR) automatically after sensors detect hardware faults1
https://docs.oracle.com/cd/E37710_01/doc.41/e23333/toc.htm

NEW QUESTION # 47
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 cell shutdown SERVICES all on the affected storage server
• B. 'crsct1 stop cluster -all' on one of the database servers
• C. CeLLCLI> list GRIDDISK where status != 'inactive' on the affected storage server
• D. shutdown -h now' on the affected storage server
• E. CellCLI alter GRIDDISK all inactive on the affected storage server
• F. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server

Answer: D,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 # 48
You have a script with several CELLCLI commands that must be executed on each cell in your Exadata full rack. The script must run on each cell simultaneously. How must you achieve this?

• A. Copy the script to all storage servers using the dcli command and manually execute it on all storage servers using the EXACLI command.
• B. Copy and execute the script on all storage servers using the EXACLI command.
• C. Copy the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.
• D. Copy the script to all storage servers using the dcli command and manually execute it on each storage server using the DCLI command.
• E. Copy and execute the script on all storage servers using the dcli command.

Answer: E

Explanation:
According to Oracle's documentation1, the Cell Control Command-Line Interface (CellCLI) utility is the command-line administration tool for Oracle Exadata System Software. It can be used to perform various tasks on Exadata Storage Servers, such as creating and managing objects, monitoring performance, and configuring alerts.
To run CELLCLI commands on multiple cells simultaneously, you can use the Distributed Command-Line Interface (dcli) utility2. The dcli utility allows you to execute commands or scripts on a group of cells or hosts in parallel. You can use the dcli utility to copy files from one cell or host to multiple cells or hosts using the -f option3. You can also use the dcli utility to execute commands or scripts on multiple cells or hosts using the -l option to specify a user name and the -g option to specify a file containing a list of cells or hosts3.
Therefore, to achieve your requirement of running a script with several CELLCLI commands on each cell in your Exadata full rack simultaneously, you must:
Copy and execute the script on all storage servers using the dcli command.

NEW QUESTION # 49
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 cell shutdown SERVICES all on the affected storage server
• B. 'crsct1 stop cluster -all' on one of the database servers
• C. CeLLCLI> list GRIDDISK where status != 'inactive' on the affected storage server
• D. shutdown -h now' on the affected storage server
• E. CellCLI alter GRIDDISK all inactive on the affected storage server
• F. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server

Answer: D,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].

NEW QUESTION # 50
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