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To prepare for the Oracle 1z1-902 certification exam, candidates should have a solid understanding of database administration and management, as well as experience working with Oracle Exadata Database Machine X8M systems. They should also be familiar with the hardware and software components of the system, including the Oracle Exadata Database Machine X8M software stack, the Oracle Exadata Storage Server software, and the Oracle Database software. With the right knowledge and experience, IT professionals can successfully pass the Oracle 1z1-902 certification exam and demonstrate their expertise in implementing and managing Oracle Exadata Database Machine X8M systems.
Oracle 1Z0-902 exam is designed for professionals who are seeking to validate their knowledge and skills in implementing and managing Oracle Exadata Database Machine X8M. 1z1-902 exam is a certification program offered by Oracle and is intended for individuals who have experience in designing, deploying, and managing Exadata Database Machine X8M systems. 1z1-902 exam measures the candidate's ability to configure and manage Exadata Database Machine X8M, monitor and troubleshoot its performance, and implement security and backup solutions.
NEW QUESTION # 13
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 can go ahead, no change is required.
- D. The installation cannot proceed until two power feeds are available per PDU.
Answer: A
NEW QUESTION # 14
You are planning the monitoring configuration for your Exadata X9M Database Machine.
Which three components are monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins?
- A. the storage server ILOM
- B. the Power Distribution Units (PDUs)
- C. ASM instances
- D. the RDMA over Converged Ethernet (RoCE) switches
- E. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers
- F. Oracle clusterware on the database server
Answer: A,C,F
Explanation:
1. The Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 6-25) recommends using the Exadata-specific Enterprise Manager Plug-Ins to monitor ASM instances.
2. Additionally, the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 6-25) recommends using the Exadata-specific Enterprise Manager Plug-Ins to monitor the storage server ILOM.
3. The Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 6-25) also recommends using the Exadata-specific Enterprise Manager Plug-Ins to monitor Oracle clusterware on the database server.
NEW QUESTION # 15
Examine this list of software components:
1. Oracle KVM Guest
2. Oracle Enterprise Manager Agent (OMA)
3. ASM instance
4. RDBMS instance
5. Automatic Diagnostic Repository Command Interpreter (ADRCI)
6. CELLCLI
7. Cell Server(CELLSRV)
8. diskmon
9. Restart Server (RS)
10. Management Server (MS)
What is the correct location where these software components can run in the standard Exadata Database Machine deployment?
- A. 1, 2, 3, 4, 8 and 9 run on the database servers; 5, 6, 7, 9 and 10 run on the Exadata storage servers.
- B. 1, 2, 3, 4, 5, 8, 9 and 10 run on the database servers; 5, 6,7, 9 and 10 run on the Exadata storage servers.
- C. 3, 4, 8, and 10 run on the database servers; 1, 2, 5, 6, 7 and 9 run on the Exadata storage servers.
- D. 2, 3, 4, 8, and 10 run on the database servers; 1, 5, 6, 7and 9 run on the Exadata storage servers.
- E. 1, 2, 3, 4, 9 and 10 run on the database servers; 5, 6, 7, 8, 9, and 10 run on the Exadata storage servers.
Answer: A
Explanation:
Oracle KVM Guest, Oracle Enterprise Manager Agent (OMA), RDBMS instance, Automatic Diagnostic Repository Command Interpreter (ADRCI), CELLCLI, diskmon, and Restart Server (RS) can all run on the database servers. The Cell Server (CELLSRV) and Management Server (MS) can both run on the Exadata storage servers. Specific instructions for installing and configuring these software components can be found in the book and can be referenced here: https://docs.oracle.com/cd/E80920_01/E80920/html/x9m_software_components.html.
NEW QUESTION # 16
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. Executing /opt/oracle.supportTools/reclaimdisks.sh -free -reclaim on each Exadata X9M Database server is required to reclaim disk space and perform partition reconfiguration.
- C. It is required to install OEDA on the first new database server.
- D. The applyElasticConfig.sh script performs network configuration for the new servers. The new servers are restarted at the end of the process.
- 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,D
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 # 17
Which two statements are true in regards to starting the Exadata Virtual Machine?
- A. Use vm_maker boot-from-iso command to boot a virtual machine.
- B. To streamline the diagnosis of virtual machines, one ISO file is used for multiple Oracle Exadata System Software releases.
- C. Use vm_maker -start-domain to start a virtual machine manually.
- D. Use vm_maker -auto-start command to configure a virtual machine to start automatically when the KVM host is started.
- E. To see Oracle Linux boot messages during guest startup, use -console option with the vm_maker -start-domain command.
Answer: A,D
NEW QUESTION # 18
Which are two valid reasons for executing an X9M-2 Exadata storage server rescue procedure?
- A. the failure of both physical M.2 disks
- B. moving all disks from one cell to another as part of a chassis-level component failure
- C. corruption in the / (root) filesystem
- D. the failure of physical disk 1
- E. accidental loss of all data from all griddisks in a storage server
- F. the failure of physical disk 0 and 11
- G. corruption in a normal or high redundancy ASM diskgroup
Answer: C,F
Explanation:
The rescue procedure is necessary when system disks fail, the operating system has a corrupt file system, or there was damage to the boot area. If only one system disk fails, then use CellCLI commands to recover. In the rare event that both system disks fail simultaneously, you must use the Exadata Storage Server rescue functionality provided on the Oracle Exadata Storage Server Software CELLBOOT USB flash drive.
NEW QUESTION # 19
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 CELLCLI on all cells using exadcli
- B. to the CELLADMIN account using cellcli interactively on each storage server
- C. to the CELLMONITOR account using cellcli interactively on each storage server
- D. to an administrator-created storage server user with appropriate privileges on celldisk objects by calling EXACLI on all cells using exadcli
- E. to the CELLMONITOR account calling CELLCLI on all cells using DCLI
- F. to the CELLADMIN account by calling CELLCLI on all cells using DCLI
Answer: A,B,F
Explanation:
To drop all celldisks on all the storage servers in an X9M-2 quarter rack, you should use the CELLADMIN account, which has the necessary privileges to perform this task. You can use the CELLCLI command-line interface to drop the celldisks. The best way to do this is by calling CELLCLI on all cells using DCLI (Oracle Database Command Line Interface) which allows you to run commands on multiple servers at once. Alternatively, you can use an administrator-created storage server user with appropriate privileges on celldisk objects by calling CELLCLI on all cells using exadcli. It is not recommended to use the CELLMONITOR account, as it has a more limited set of privileges. It is also important to note that EXACLI is not a valid tool for this task
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmmn/maintaining-exadata-storage-servers.html
NEW QUESTION # 20
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. 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.
- C. It is required to install OEDA on the first new database server.
- D. The applyElasticConfig.sh script performs network configuration for the new servers. The new servers are restarted at the end of the process.
- E. Executing /opt/oracle.supportTools/reclaimdisks.sh -free -reclaim on each Exadata X9M Database server is required to reclaim disk space and perform partition reconfiguration.
Answer: B,D
Explanation:
https://docs.oracle.com/en/database/oracle/oracle-database/21/ladbi/db-on-exadata.html
NEW QUESTION # 21
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?
- A. PMEM Cache section within Memory Statistics
- B. PMEM Cache section within Exadata Smart Statistics
- C. PMEM Pool cache Read Hits in the Cache Sizes portion of the Report Summary
- D. cell PMEM cache Read Hits in the Database IOs portion of the Performance Summary
- E. PMEM Pool Misses in the Exadata Outlier Summary
Answer: A,B
Explanation:
The AWR report has two sections that show statistics for X9M Persistent Memory Cache: the PMEM Cache section within Memory Statistics and the PMEM Cache section within Exadata Smart Statistics. Both of these sections provide detailed information about the read and write hits and misses, as well as the total capacity and utilization of the PMEM cache. (Source: Oracle Exadata Database Machine X9M Implementation Essentials, page 515)
NEW QUESTION # 22
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 root user
- B. hardware monitoring using the storage server ILOM
- C. using the CELLCLI list LUN DETAIL command as the celladmin user
- D. using the CELLCLI CALIBRATE command on the storage server after logging in as the celladmin user
Answer: B,C
NEW QUESTION # 23
Which are two correct statements about backing up Exadata Database Machine?
- A. For high availability, system area can be on the first two disks and M.2 devices.
- B. Backup of the Oracle Cluster Registry, which also contains Voting Disk information, is automatically maintained on the file system of the first database server.
- C. The M.2 disk is hot pluggable and can be replaced when the power is on, but you will have to restore the system data manually.
- D. Use a snapshot-based backup of an Oracle Exadata Database Machine database server software.
- E. Backing up Exadata Storage Server Software is critical for restoration.
Answer: B,C
NEW QUESTION # 24
Which two quarantine types can disable Smart Scan for multiple databases that offload SQL statements to a cell on an Exadata Database Machine?
- A. Database Quarantine
- B. Cell Offload Quarantine
- C. Disk Region Quarantine
- D. Manually created Quarantine
- E. SQL Plan Quarantine
Answer: A,E
NEW QUESTION # 25
How do ASM failure groups provide redundancy?
- A. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
- 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. 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.
Answer: A
NEW QUESTION # 26
What is the maximum DRAM capacity you can expand an X9M-2 DB Server?
- A. 1024GB
- B. 768GB
- C. 2048GB
- D. 1536GB
- E. 512GB
- F. 384GB
Answer: A
Explanation:
According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book, the maximum DRAM capacity you can expand an X9M-2 DB Server is 1024GB. This is the maximum amount of DRAM that can be installed in the server. The specific steps for adding DRAM are outlined in the book and can be referenced here: https://docs.oracle.com/cd/E80920_01/E80920/html/x9m_hardware_memory.html.
NEW QUESTION # 27
An Exadata X9M-2 Elastic Rack with 4 Database Servers and 8 HC Storage Servers and 3-phase 24kVA 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 installation cannot proceed until two power feeds are available per PDU.
- B. 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.
- C. A splitter cable can be used to provide power to all PDU cables.
- D. The installation can go ahead, no change is required.
Answer: A
Explanation:
In order for an Exadata X9M-2 Elastic Rack to be installed, two power feeds are required for each of the three-phase 24kVA PDUs. A single cable from each PDU will not be enough to power the rack, and neither a splitter cable nor rearrangement of the power cables from the servers to the PDUs will be able to provide sufficient power for the system. Therefore, the installation cannot proceed until two power feeds are available per PDU.
For more information about power requirements for Exadata X9M-2 Elastic Racks, refer to the Oracle Exadata Database Machine X9M Implementation Essentials official text book and resources.
Search results: [1] Oracle Exadata Database Machine X9M-2 Full Rack Installation - Oracle Docs [2] Exadata Database Machine X8M-2 Mid-Size Rack Installation - Oracle Docs
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmin/exadata-site-requirements.html
NEW QUESTION # 28
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. netstat -rn
- D. ifconfig -a legrep "re0| re1"
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 # 29
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. Install Oracle Rest Data Services on each Database server and install the MS APEX application.
- B. The MS Process on the storage servers is natively endowed with REST services, but are not enabled by default.
- C. Install Oracle Rest Data Services on each Storage server and install the MS APEX application.
- D. 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.
Answer: B
Explanation:
To enable REST access to the MS process, you need to manually enable the REST services on each storage server by running the command cellcli -e "ALTER CELL ENABLE REST" and then configure authentication and authorization to ensure secure access. This is described in detail in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (Chapter 8, Securing the Exadata Database Machine).
https://docs.oracle.com/en/cloud/paas/exadata-cloud/csexa/access-rest-api.html
NEW QUESTION # 30
You are adding a disk expansion kit to a running Exadata X8M Database Machine's Database Servers, and have a filesystem layout that includes:
After running the following commands, which command needs to be run to add 20G of space to the filesystem mounted on /u01?
- A. # xfs_growfs /uOl +20G
- B. # lvextend -L +20G -verbose /dev/VGExaDb/LVDbOral
- C. # resize2fs +20G /dev/VGExaDb/LVDbOral
- D. # lvextend -L +20G -verbose /dev/mapper/VGExaDb-LVDbOral
Answer: D
Explanation:
After running the commands above, the filesystem mounted on /u01 is on the logical volume /dev/mapper/VGExaDb-LVDbOral. So, to add 20G of space to the filesystem mounted on /u01, the command that needs to be run is:
lvextend -L +20G --verbose /dev/mapper/VGExaDb-LVDbOral
This command will extend the logical volume /dev/mapper/VGExaDb-LVDbOral by 20 GB of space. It is important to note that the option --verbose is used to display the progress of the operation.
NEW QUESTION # 31
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Oracle 1Z0-902 certification exam is designed to test the skills and knowledge of IT professionals who are responsible for implementing and managing the Oracle Exadata Database Machine X8M. Oracle Exadata Database Machine X8M Implementation Essentials certification exam is intended for individuals who have experience working with Oracle database systems and want to enhance their expertise in implementing and managing Exadata Database Machine X8M.
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