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Free Oracle 1Z0-902 Exam Questions (page: 8)

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PDF with 97 Questions

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?

  1. A splitter cable can be used to provide power to all PDU cables.
  2. 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.
  3. The installation cannot proceed until two power feeds are available per PDU.
  4. The installation can go ahead, no change is required.

Answer(s): C

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 Reference:
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmin/exadata-site- requirements.html



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?

  1. CeLLCLI> alter cell shutdown SERVICES all on the affected storage server
  2. CeLLCLI> list GRIDDISK where status != 'inactive' on the affected storage server
  3. 'crsct1 stop cluster -all' on one of the database servers
  4. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server
  5. CellCLI alter GRIDDISK all inactive on the affected storage server
  6. shutdown -h now' on the affected storage server

Answer(s): E,F

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



Which are two valid reasons for executing an X9M-2 Exadata storage server rescue procedure?

  1. the failure of physical disk 1
  2. corruption in the / (root) filesystem
  3. the failure of both physical M.2 disks
  4. the failure of physical disk 0 and 11
  5. moving all disks from one cell to another as part of a chassis-level component failure
  6. accidental loss of all data from all griddisks in a storage server
  7. corruption in a normal or high redundancy ASM diskgroup

Answer(s): B,C

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 backup.
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 files.



What is the minimum Oracle Linux version required to support RoCE and Persistent Memory?

  1. Oracle Linux 7.5
  2. Oracle Linux 7.9
  3. Oracle Linux 8.0
  4. Oracle Linux 7.7

Answer(s): B

Explanation:

Oracle Linux 7.9 is the minimum version required to support RoCE and Persistent Memory. This is because Oracle Linux 7.9 includes kernel enhancements that enable RDMA over Converged Ethernet (RoCE) networking and Intel Optane DC Persistent Memory Modules (DCPMM) for Exadata X8M systems.
These features allow faster access latency and higher throughput for database workloads.



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