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1Z0-902 Valid Exam Cost 100% Pass | High Pass-Rate Oracle Exadata Database Machine X8M Implementation Essentials Latest Dumps Ppt Pass for sure

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Oracle Exadata Database Machine X8M is a high-performance database machine designed to deliver speed, efficiency, and security for mission-critical workloads. The machine combines hardware and software technologies that are specifically optimized for Oracle databases. With the Oracle 1z1-902 exam, IT professionals can demonstrate their expertise in implementing and managing this powerful database machine, which is an essential skill in today's data-driven world.

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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q45-Q50):

NEW QUESTION # 45
Which two activities are supported on the storage servers in an Exadata Database Machine?

  • A. upgrading the Storage Server software package using rpm
  • B. changing the root password
  • C. configuring secure shell user equivalency for the cellmonitor user
  • D. installing an alternative package manager
  • E. upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure

Answer: B,C

Explanation:
According to the web search results123, the storage servers in an Exadata Database Machine are mainly used for processing data at the storage level and offloading some SQL operations from the database servers. Therefore, the two activities that are supported on the storage servers are:
A) changing the root password
E) configuring secure shell user equivalency for the cellmonitor user
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmso/exadata-introduction.html


NEW QUESTION # 46
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. 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.
  • B. Install Oracle Rest Data Services on each Database server and install the MS APEX application.
  • 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, but are not enabled by default.

Answer: A

Explanation:
The MS process on Exadata storage servers is natively endowed with REST services and these services are enabled by default. However, it is important to create appropriate roles and users to ensure security when accessing these services. This way, it is possible to disable ssh access to the storage servers, and still enable REST access to the MS process. It's not necessary to install Oracle Rest Data Services on each Database or Storage server or install the MS APEX application, the MS process on the storage servers already have REST services by default.


NEW QUESTION # 47
How do ASM failure groups provide redundancy?

  • A. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
  • B. Extended Redundancy mirrors data across data centers providing the highest levels of data protection.
  • 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: A

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 # 48
Which two statements are true about enabling write-back flash cache?

  • A. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
  • B. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
  • C. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
  • D. Before write-back flash cache is enabled, you need to drop the Flash Cache first.
  • E. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.

Answer: A,B

Explanation:
When enabling write-back flash cache in a rolling manner, it is important to use DBCLI to inactivate the grid disks on all cells first so that all the cells are in the same state before the process is started. In a non-rolling manner, you must drop the Persistent Memory Commit Accelerator (PMEMLog) first. Write-back flash cache is not on by default for High Capacity Storage Servers in High Redundancy configurations and can be used on Extreme Flash Storage Servers. It's also important to check if it's necessary to drop the flash cache before enabling write-back flash cache.


NEW QUESTION # 49
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. Using EXADCLI instead of CELLCLI to create the griddisks
  • B. File permissions on the griddisks in each database server
  • C. Exadata storage realms using database-scoped security mode
  • D. Exadata storage realms using ASM-scoped security mode
  • E. File permissions on the griddisks in each storage server

Answer: D,E

Explanation:
When multiple databases share space on the storage servers in an unpartitioned storage grid, two Exadata security features can be configured to control which databases can access which griddisks.
Exadata storage realms using ASM-scoped security mode: This feature allows you to create storage realms and assign them to specific databases. This allows you to control which databases have access to which griddisks. The ASM-scoped security mode applies to all griddisks within an ASM disk group, which means that all griddisks in a disk group will be accessible only to the databases that belong to the assigned storage realm.
File permissions on the griddisks in each storage server: This feature allows you to configure file permissions on the griddisks at the storage server level. You can assign specific permissions to specific users or groups, allowing you to control which databases can access which griddisks.


NEW QUESTION # 50
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