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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 for IT professionals who are interested in validating their skills and knowledge in implementing and managing Oracle Exadata Database Machine X8M systems. 1Z0-902 Exam is intended for individuals who work in database administration, system administration, and IT operations roles.

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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q18-Q23):

NEW QUESTION # 18
Which statement is true about the Persistent Memory Commit Accelerator?

A. Persistent Memory Commit Accelerator helps to further reduce redo log write latency by using Persistent Memory and Remote Direct Memory Access (RDMA).
B. Persistent Memory Commit Accelerator contains logging information from all tiers of the software stack for rapid triage and diagnostics.
C. Persistent Memory Commit Accelerator copies redo log data from disk for faster redo apply on Data Guard Standby Databases.
D. Persistent Memory Commit Accelerator reduces redo log write latency by using Persistent Memory and RDMA before flushing to Flash then disk.
E. Persistent Memory Commit Accelerator tracks changes to Persistent Memory Data Accelerator to ensure duplicate blocks are not written to Flash.

Answer: A

Explanation:
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmso/new-features-exadata-system-software-release-23.html

NEW QUESTION # 19
Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?

A. ZFS Snapshots can provide rapid cloning of development and test environment.
B. Top of Rack (ToR) switches are managed as part of the hardware stack and software levels are upgraded during the patching process.
C. ZFSSA may connect directly to the Exadata 100Gb RoCE network switches.
D. When backing up multi-rack systems, sharing Exadata X9M switches is recommended.

Answer: C,D

Explanation:
A . ZFS Storage Appliance (ZFSSA) can't connect directly to the Exadata 100Gb RoCE network switches. ZFSSA uses Fibre Channel protocol to connect to the Exadata storage cells. C. When backing up multi-rack systems, sharing Exadata X9M switches is not recommended. Each rack should have its own switches to minimize the risk of data loss due to switch failure.
Review the safety guidelines.
Unpack Oracle Exadata Rack.
Let the Exadata acclimatize for 24 hours.
Place Exadata in its allocated space.
Stabilize the Exadata Rack.
Power on Exadata PDU A.
Power on Exadata PDU B.
This order ensures that the necessary safety precautions are taken before installing the Exadata Database Machine, and that the machine is allowed to acclimate to its new environment before being powered on.

NEW QUESTION # 20
Which two statements are true about Exadata System Software metrics and alerts on an Exadata Database Machine?

A. Metric thresholds, if set, will persist across storage and database server reboots.
B. Metric alerts are never stateful.
C. Metric alert notifications can be sent to only one destination such as Enterprise Manager OR SNMP OR SMTP.
D. SMTP metric alert notifications must be sent to both ASR manager and Enterprise Manager agents.
E. Metrics have no thresholds set on them by default.

Answer: A,E

Explanation:
Exadata System Software metrics and alerts work as follows:
Persistence of Thresholds: When metric thresholds are configured, they remain active and persist across server reboots. This ensures consistent monitoring behavior even after maintenance or unexpected reboots .
Default Metrics: By default, metrics are collected without predefined thresholds. Administrators must set custom thresholds to enable specific alerting based on their operational requirements.

NEW QUESTION # 21
Which two activities are supported on the storage servers in an Exadata Database Machine?

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

Answer: C,D

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 # 22
Which three of the following options are available for database consolidation on Exadata?

A. Multiple databases spanning a Bare Metal and Virtual Machine cluster to provide resource isolation and consolidation concurrently
B. A single database with one or more schema per application
C. Multiple Virtual Machine clusters supporting a single database for greatest resource isolation
D. Multiple pluggable databases in one or more container databases on a Virtual Machine or Bare Metal cluster
E. Bare Metal deployment with one database per database server
F. Multiple Databases on a cluster

Answer: C,D,F

NEW QUESTION # 23
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