NEW 1Z0-902 PRACTICE QUESTIONS | EXAM 1Z0-902 QUIZ

New 1Z0-902 Practice Questions | Exam 1Z0-902 Quiz

New 1Z0-902 Practice Questions | Exam 1Z0-902 Quiz

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Oracle 1Z0-902: Oracle Exadata Database Machine X8M Implementation Essentials exam is designed to validate the skills and knowledge of professionals who are looking to implement Exadata Database Machine X8M. Oracle Exadata Database Machine X8M Implementation Essentials certification exam is intended to test the candidate’s ability to install, configure, and manage Exadata Database Machine X8M. Oracle Exadata Database Machine X8M Implementation Essentials certification is widely recognized in the IT industry and can help professionals advance their careers. The Exadata Database Machine X8M is a high-performance database machine designed for running Oracle Database workloads. The machine is designed to deliver extreme performance, scalability, and reliability.

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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q80-Q85):

NEW QUESTION # 80
Which two options describe the flash memory capabilities of the Exadata X9M-2 database and storage severs?

  • A. 8x 6.4 TB NVMe flash cards on the Extended (XT) storage server
  • B. 4 x 6.4 TB NVMe flash cards on the database server
  • C. 4 x 6.4 TB NVMe flash cards on the High Capacity (HC) storage server
  • D. No flash storage on the database server
  • E. 8 x 6.4 TB NVMe flash cards on the Extreme Flash (EF) storage server

Answer: C,E

Explanation:
In the Exadata X9M-2 configuration:
High Capacity (HC) Storage Server: Each HC storage server is equipped with 4 x 6.4 TB NVMe flash cards. These flash cards serve as a cache layer to accelerate I/O performance, especially for read-heavy and mixed workload environments. This configuration combines large storage capacity with NVMe flash for optimal data processing.
Extreme Flash (EF) Storage Server: Each EF storage server contains 8 x 6.4 TB NVMe flash cards, which provides extremely high IOPS and low latency. This configuration is designed for applications demanding high-performance flash storage, making it suitable for intensive OLTP and analytical workloads.
Database Server Flash Storage: The Exadata X9M-2 database servers themselves do not include flash storage as part of their default configuration, which aligns with option D. However, since option E is correct, we do not include D as the other correct answer.


NEW QUESTION # 81
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?

  • A. PMEM Cache section within Memory Statistics
  • B. PMEM Pool Misses in the Exadata Outlier Summary
  • C. PMEM Cache section within Exadata Smart Statistics
  • D. PMEM Pool cache Read Hits in the Cache Sizes portion of the Report Summary
  • E. cell PMEM cache Read Hits in the Database IOs portion of the Performance Summary

Answer: A,C

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 # 82
You want to monitor how a large production table is accessed. Especially, you are interested to see how the access on that particular table leverages the benefits of the Exadata Platform.
Which two actions are NOT appropriate for that purpose?

  • A. You query v$segment_statistics and filter for the Object ID of your table from dba_objects and the the column STATISTIC_NAME='optimized physical reads'.
  • B. YOU query VSSYSTEM_EVENTS and filter for the event 'cell physical IO interconnect bytes returned by smart scan', associated to your table.
  • C. You query v$SYSTAT and filter for the statistic 'cell smart table scan', associated to your table.
  • D. You run the CellCli-command list activerequest , filtering for the attributes ioReason and objectNumber, that you specify as 'Smart Scan' and the Object ID of your table from DBA_OBJECTS.

Answer: A,B

Explanation:
The two actions that are not appropriate for monitoring how a large production table is accessed in order to leverage the benefits of the Exadata Platform are A) querying VSSYSTEMEVENTS and filtering for the event 'cell physical IO interconnect bytes returned by smart scan', associated to your table; and B) querying v$segmentstatistics and filtering for the Object ID of your table from dbaobjects and the the column STATISTICNAME='optimized physical reads'. Instead, you should query v$SYSTAT and filter for the statistic 'cell smart table scan', associated to your table (C), or run the CellCli-command list activerequest, filtering for the attributes ioReason and objectNumber, that you specify as 'Smart Scan' and the Object ID of your table from DBA_OBJECTS (D). These two methods are outlined in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (Chapter 8, Monitoring the Exadata Database Machine).


NEW QUESTION # 83
Which two Exadata security features would you configure to control which databases can access which griddisks, when multiple databases share space on your storage servers in an unpartitioned storage grid?

  • A. Exadata storage realms using database-scoped security mode
  • B. Exadata storage realms using ASM-scoped security mode
  • C. File permissions on the griddisks in each database server
  • D. Using EXADCLI instead of CELLCLI to create the griddisks
  • E. File permissions on the griddisks in each storage server

Answer: A,B

Explanation:
Exadata storage realms using ASM-scoped security mode allows you to control which database can access which griddisks by creating realms at the ASM level, thereby allowing you to limit the access of each database to the griddisks that it needs to access. This is covered in section 3.15.2 of the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources [1].
Exadata storage realms using database-scoped security mode allows you to control which database can access which griddisks by creating realms at the database level [1], thereby allowing you to limit the access of each database to the griddisks that it needs to access. This is covered in section 3.15.3 of the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources [2].
[1] https://docs.oracle.com/en/engineered-systems/exadata-database-machine/x9m/exad-implementing-database-machine-x9m.pdf [2] https://docs.oracle.com/en/engineered-systems/exadata-database-machine/x9m/exad-implementing-database-machine-x9m.pdf


NEW QUESTION # 84
Which three statements are true about the CELLCLI command?

  • A. It can be executed on storage servers.
  • B. It requires root privileges to create CELLDISKS and GRIDDISKS.
  • C. It can be executed using the DCLI utility.
  • D. It can execute commands on multiple storage servers in parallel.
  • E. It has command-line history.

Answer: A,C,E

Explanation:
The CellCLI utility supports command-line history.
Each Exadata Storage cell can be monitored, configured, and maintained using the cellcli command line interface.
The dcli utility facilitates centralized management across an Oracle Exadata Storage Server Software realm by automating the execution of CellCLI commands on a set of cells and returning the output to the centralized management location where the dcli utility was run.


NEW QUESTION # 85
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