[Oct 17, 2023] New 1z1-902 Exam Dumps with High Passing Rate
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Oracle 1z1-902 exam, also known as the Oracle Exadata Database Machine X8M Implementation Essentials exam, is a certification exam designed to test the knowledge and skills of IT professionals in implementing and managing the Oracle Exadata Database Machine X8M system. 1z1-902 exam is intended for professionals who have experience with this system and want to validate their expertise in this area.
NEW QUESTION # 29
Which three statements are true about Oracle Configuration Manager (OCM) for an Exadata Database Machine?
- A. It collects configuration information on demand.
- B. It collects configuration information automatically.
- C. It is mandatory to install OCM on at least one database server.
- D. Collected configuration information can be uploaded manually to Oracle.
- E. It is mandatory to install OCM on all database servers.
- F. Collected configuration information can be uploaded automatically to Oracle.
Answer: C,E,F
NEW QUESTION # 30
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. 4,1, 6, 9
- B. 7,6,9,11
- C. 10, 8, 9, 11
- D. 0
- E. 10, 8, 2, 5
Answer: C
Explanation:
The correct order of steps is 10, 8, 9, 11. The 10th step is to use the drop down to add Exadata X9M Database Servers, the 8th step is to use the drop down to add Exadata X9M EF Storage Servers, the 9th step is to use "Add Equipment" to add the ZFS Storage Controllers, and the 11th step is to use "Add Equipment" to add the ZFS Storage Trays. These steps are referenced in the Oracle Exadata Database Machine X9M Implementation Essentials Official Textbook, which is available online at https://docs.oracle.com/cd/E80437_01/E80437/html/index.html.
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmin/configuring-exadata.html
NEW QUESTION # 31
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. The applyElasticConfig.sh script performs network configuration for the new servers. The new servers are restarted at the end of the process.
- B. Do not proceed if the OEDA Validate Configuration File step displays an error message about missing files p6880880.zip.
- C. 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.
- D. Executing /opt/oracle.supportTools/reclaimdisks.sh -free -reclaim on each Exadata X9M Database server is required to reclaim disk space and perform partition reconfiguration.
- E. It is required to install OEDA on the first new database server.
Answer: A,B
NEW QUESTION # 32
Which two statements are true in regards to starting the Exadata Virtual Machine?
- A. To see Oracle Linux boot messages during guest startup, use -console option with the vm_maker -start-domain command.
- B. Use vm_maker -auto-start command to configure a virtual machine to start automatically when the KVM host is started.
- C. Use vm_maker -start-domain to start a virtual machine manually.
- D. Use vm_maker boot-from-iso command to boot a virtual machine.
- E. To streamline the diagnosis of virtual machines, one ISO file is used for multiple Oracle Exadata System Software releases.
Answer: B,C
Explanation:
Statement B is true as the vm_maker -start-domain command can be used to start a virtual machine manually, as stated in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 65).
Statement E is also true as the vm_maker -auto-start command can be used to configure a virtual machine to start automatically when the KVM host is started [1][2], as stated in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 66).
NEW QUESTION # 33
Which dbmcli command is NOT valid on Exadata X9M?
- A. dbmcli -e "LIST ALERTHISTORY WHERE agelnMinutes < 15"
- B. dbmcli -e "LIST IBPORT DETAIL"
- C. dbmcli -e "LIST METRICHISTORY WHERE name LIKE 'DS_.*'"
- D. dbmcli -e "LIST METRICCURRENT WHERE name = 'DS_TEMP' "
Answer: A
Explanation:
1. dbmcli -e "LIST METRICHISTORY WHERE name LIKE 'DS_.*'" is valid command and it is used to list the historical values for metrics where the name starts with "DS_."
2. dbmcli -e "LIST METRICCURRENT WHERE name = 'DS_TEMP' " is valid command and it is used to list the current value of the metric named "DS_TEMP"
3. dbmcli -e "LIST IBPORT DETAIL" is valid command and it is used to list the InfiniBand ports and details of the Exadata X9M.
"dbmcli" is a command-line tool that is used to manage and monitor the Exadata Database Machine. It allows you to perform various tasks such as managing the database, storage, and network components, and monitoring the performance and health of the machine. The command "dbmcli -e "LIST ALERTHISTORY WHERE agelnMinutes < 15" is not a valid command, it is not supported on Exadata X9M.
NEW QUESTION # 34
Which two statements are true for the Oracle Exadata Configuration Assistant (OECA)?
- A. OECA reconfigures the size of disk groups and recreates grid disks.
- B. OECA allows one XT storage server in the configuration.
- C. OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.
- D. OECA facilitates PDU power selection initially and after equipment addition.
- E. OECA extends the hardware for the elastic configuration only.
Answer: B,C
NEW QUESTION # 35
What are two recommended configuration best practices for backup and recovery on Exadata?
- A. Even if the backup was limited to writing to four tape drives, eight channels could be specified to expedite the restore process.
- B. 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.
- C. 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.
- D. 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.
Answer: A,D
NEW QUESTION # 36
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 celldisk attributes name, deviceName, diskType, physicalFirmware
- B. list cell attributes name, deviceName, diskType, physicalFirmware
- C. list physicaldisk attributes name, deviceName, diskType, physicalFirmware
- D. list devices 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 # 37
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 "set threshold ds_temp comparison=' >', critical=30" on each database server
- C. dbmcli -e "alert metriccurrent ds_temp where metricValue > 30" on each database server
- D. dbmcli -e "create threshold ds_temp comparison='>', critical=30" on each database server
Answer: A
NEW QUESTION # 38
Which are two correct statements for managing virtual deployment using Oracle Exadata Deployment Assistant (OEDA)?
- A. OEDA sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA.
- B. OEDA deployment steps include calibrate cells, create cell disks, and resecure machine.
- C. OEDA allows customers to have both bare metal (BM) and virtual machine (VM) in an Exadata X9M Quarter Rack.
- D. There is no limit on the number of VMs in an Exadata rack as long as the Exadata rack has adequate resources.
Answer: B,C
NEW QUESTION # 39
How do ASM failure groups provide redundancy?
- A. Extended Redundancy mirrors data across data centers providing the highest levels of data protection.
- B. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
- C. 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.
- D. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
Answer: B
Explanation:
In an Automatic Storage Management (ASM) environment, failure groups are used to provide redundancy for the storage disks. Failure groups are used to group together a set of disks and ensure that no two copies of the same data are stored on the same physical disk or storage server. This way, if a disk or storage server fails, the data can still be accessed from the other copy.
For example, if the disks in a failure group are mirrored, one copy of the data is stored on one set of disks, and the other copy is stored on another set of disks. This way, if a disk or storage server fails, the data can still be accessed from the other copy.
ASM failure groups also provide the option to spread the data across different storage servers, this way, even if a storage server fails, data can still be accessed from the other storage servers in the group. This will improve the availability of the data.
NEW QUESTION # 40
Which are two correct statements for managing virtual deployment using Oracle Exadata Deployment Assistant (OEDA)?
- A. OEDA deployment steps include calibrate cells, create cell disks, and resecure machine.
- B. OEDA allows customers to have both bare metal (BM) and virtual machine (VM) in an Exadata X9M Quarter Rack.
- C. There is no limit on the number of VMs in an Exadata rack as long as the Exadata rack has adequate resources.
- D. OEDA sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA.
Answer: B,D
Explanation:
Oracle Exadata Deployment Assistant (OEDA) enables customers to deploy Oracle Exadata Database Machine in virtualized environments and it support both bare metal and virtual machine deployment in an Exadata X9M Quarter Rack.
OEDA allows customers to have both bare metal (BM) and virtual machine (VM) in an Exadata X9M Quarter Rack, and it sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA. According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], OEDA deployment steps include setup, configure, deploy, and manage. The number of VMs in an Exadata rack is limited by the available resources in the rack, such as CPU, Memory, and Storage.
NEW QUESTION # 41
Which of the following is NOT a requirement when validating, receiving, unpacking, and planning access route and space requirements for Exadata Database Machine?
- A. 914mm of space required above the rack height is required for maintenance access.
- B. A conditioned space is required to remove the packaging material to reduce particles before entering the data center.
- C. The entire access route to the installation site should be free of raised-pattern flooring that can cause vibration.
- D. All four leveling and stabilizing feet should be raised and out of the way prior to moving the rack.
- E. The incline of any access route ramp must be less than or equal to 6 degrees.
- F. Oracle Exadata Rack may only be installed on raised floor environments.
Answer: F
Explanation:
Exadata Database Machine is a pre-configured and pre-tuned hardware and software system designed to run Oracle Database, it can be installed on raised floor environments, but also on concrete or tile floors Oracle Exadata Database Machine X9M Implementation Essentials states that Exadata racks are designed to be installed on flat surfaces, not raised floor environments. It is not required to install the rack on raised floor environments. Additionally, the other options listed are all requirements for validating, receiving, unpacking, and planning access route and space requirements for Exadata Database Machine. (Source: Oracle Exadata Database Machine X9M Implementation Essentials, page 41)
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmin/index.html
NEW QUESTION # 42
What is the minimum Oracle Linux version required to support RoCE and Persistent Memory?
- A. Oracle Linux 7.5
- B. Oracle Linux 8.0
- C. Oracle Linux 6.9
- D. Oracle Linux 7.7
Answer: A
NEW QUESTION # 43
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. cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk
- C. OS I/O metrics using OS tools such as iostat on the storage servers
- 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 database servers
Answer: B,D
Explanation:
1. OS I/O metrics using Enterprise Manager host pages for the storage servers: Enterprise Manager provides a detailed view of the storage server's performance including I/O metrics and statistics. You can use these metrics to analyze I/O performance and identify any bottlenecks.
2. cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk: These commands are used to gather information about storage server performance, including I/O statistics, disk usage, and resource allocation.
NEW QUESTION # 44
Which are two valid reasons for executing an X9M-2 Exadata storage server rescue procedure?
- A. corruption in a normal or high redundancy ASM diskgroup
- B. accidental loss of all data from all griddisks in a storage server
- C. moving all disks from one cell to another as part of a chassis-level component failure
- D. the failure of physical disk 0 and 11
- E. the failure of physical disk 1
- F. corruption in the / (root) filesystem
- G. the failure of both physical M.2 disks
Answer: F,G
Explanation:
The two valid reasons are:
corruption in the / (root) filesystem . According to 1, this is one of the scenarios that requires a storage server rescue procedure , because it prevents the storage server from booting up normally . The rescue procedure will re-image the root filesystem with a fresh copy of the operating system and restore the configuration files from a backup1.
the failure of both physical M.2 disks . According to 2, each Exadata Storage Server X9M-2 has two physical M.2 disks that store the operating system and configuration files for the storage server . If both M.2 disks fail , then the storage server cannot boot up or function properly . The rescue procedure will replace the failed M.2 disks with new ones and re-image them with the operating system and configuration files2.
NEW QUESTION # 45
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Oracle Exadata is a high-performance database machine that is designed to deliver extreme performance, high availability, and scalability. The Oracle Exadata Database Machine X8M is the latest addition to the Oracle Exadata family, and it is designed to deliver faster performance, lower latency, and increased scalability. The Oracle 1Z0-902 certification exam validates the skills and knowledge required to implement and manage Oracle Exadata Database Machine X8M.
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