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  The Oracle Exadata Database Machine X8M is a high-performance database appliance that is designed to deliver extreme performance, scalability, and availability for mission-critical databases. It is designed to provide optimized performance for Oracle database workloads, including OLTP, data warehousing, and analytics. The appliance combines hardware and software components that are engineered to work together to deliver optimal performance and scalability.

  The Oracle 1Z0-902 exam, also known as the Oracle Exadata Database Machine X8M Implementation Essentials Exam, is designed for IT professionals who want to demonstrate their knowledge and skills in implementing and managing Oracle Exadata Database Machine X8M systems. This exam is part of the Oracle Certified Specialist (OCS) certification and is recommended for professionals who have experience with Oracle Exadata Database Machine X8M and want to validate their expertise in this area.

  Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q13-Q18):

  NEW QUESTION # 13
  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 helps to further reduce redo log write latency by using Persistent Memory and Remote Direct Memory Access (RDMA).
  • E. Persistent Memory Commit Accelerator tracks changes to Persistent Memory Data Accelerator to ensure duplicate blocks are not written to Flash.

  Answer: B

  Explanation:
  Persistent Memory Commit Accelerator reduces redo log write latency by using Persistent Memory and RDMA before flushing to Flash then disk. This helps to further reduce redo log write latency by utilizing the speed and low latency of Persistent Memory, along with the Remote Direct Memory Access (RDMA) protocol, to commit changes to disk faster. This allows the system to quickly commit changes to disk, resulting in improved performance and reduced latency.

  
  

  NEW QUESTION # 14
  Which are two correct statements about backing up Exadata Database Machine?

  • A. Backing up Exadata Storage Server Software is critical for restoration.
  • B. For high availability, system area can be on the first two disks and M.2 devices.
  • C. Use a snapshot-based backup of an Oracle Exadata Database Machine database server software.
  • D. 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.
  • E. Backup of the Oracle Cluster Registry, which also contains Voting Disk information, is automatically maintained on the file system of the first database server.

  Answer: A,E

  Explanation:
  [1] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 4: Oracle Clusterware [2] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 8: Oracle Exadata Storage Server Software [3] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 9: Oracle Exadata Storage Server Infrastructure
  https://www.oracle.com/technetwork/database/availability/exadata-backup-recovery-bp-3633870.pdf

  
  

  NEW QUESTION # 15
  Which four actions should you take before proceeding with applying updates to your Exadata Database Machine?

  • A. Consult My Oracle Support note 888828.1 to determine the current recommended Exadata software release.
  • B. Run exachk and resolve only WARNINGS that you have not seen before.
  • C. For database servers, perform a server backup using patchmgr -dbnodes db_list_file -backup -rolling.
  • D. Run the appropriate patchmgr preqequisite check step for each component being updated.
  • E. Check the Exadata Critical Issues My Oracle Support note 1270094.1 for any issues not added to the latest version of exachk.
  • F. Run patchmgr --all_comp -autofix -autobackup -upgrade -rolling.

  Answer: A,B,D,E

  Explanation:
  According to Oracle.com documents or resources, the four actions that you should take before proceeding with applying updates to your Exadata Database Machine are:
  1. Consult My Oracle Support note 888828.1 to determine the current recommended Exadata software release123.
  2. Check the Exadata Critical Issues My Oracle Support note 1270094.1 for any issues not added to the latest version of exachk453.
  3. Run exachk and resolve only WARNINGS that you have not seen before3.
  4. Run the appropriate patchmgr preqequisite check step for each component being updated3.

  
  

  NEW QUESTION # 16
  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_.*'"
    B) dbmcli -e "LIST METRICCURRENT WHERE name = 'DS_TEMP' "

  Answer: A

  
  

  NEW QUESTION # 17
  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 helps to further reduce redo log write latency by using Persistent Memory and Remote Direct Memory Access (RDMA).
  • D. Persistent Memory Commit Accelerator contains logging information from all tiers of the software stack for rapid triage and diagnostics.
  • E. Persistent Memory Commit Accelerator tracks changes to Persistent Memory Data Accelerator to ensure duplicate blocks are not written to Flash.

  Answer: C

  
  

  NEW QUESTION # 18
  ......

  The modern Oracle world is changing its dynamics at a fast pace. To stay and compete in this challenging market, you have to learn and enhance your in-demand skills. Fortunately, with the 1z1-902 Oracle Exadata Database Machine X8M Implementation Essentials certification exam you can do this job nicely and quickly. To do this you just need to enroll in the Oracle 1z1-902 Certification Exam and put all your efforts to pass the 1z1-902 Oracle Exadata Database Machine X8M Implementation Essentials certification exam.

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