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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q39-Q44):

NEW QUESTION # 39
You are updating your Exadata X9M-2 Elastic Database Machine with 6 database servers and 12 High Capacity Storage Servers. You will be using patchmgr to apply updates across the entire machine while still maintaining database availability.
Assuming you are driving patchmgr from an external server, which statement is true about the execution phase?

  • A. patchmgr must be invoked with the -rolling argument with all database and storage servers listed in a single input file.
  • B. patchmgr cannot apply updates in a rolling manner, you must manually apply patches with the dbnodeudpate and cellupdate tools if high availability is required.
  • C. patchmgr must be invoked with the -rolling argument. Each component type must be upgraded independently of the other.
  • D. patchmgr will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption.

Answer: A

Explanation:
According to Oracle documentation12, patchmgr is the utility used to update software for Exadata infrastructure components. It can apply patches in a rolling or non-rolling manner depending on the argument and input file provided.


NEW QUESTION # 40
Which two statements are true about applying updates on Exadata systems?

  • A. For regular Exadata updates, yum automatically installs a non-UEK kernel, which can be selected to boot from grub.
  • B. To speed up applying storage server updates in a rolling manner, updating two storage servers simultaneously is recommended.
  • C. Failed storage server updates are automatically rolled back to a previous release.
  • D. When running a "yum update" for a new Exadata release, all other repositories should be disabled.
  • E. Failed database server updates are rolled back to a working state on a previous release automatically.
  • F. Updating kernel and RDMA packages on storage cells should be prevented by excluding them with the yum -exclude option.

Answer: C,E

Explanation:
When applying updates on Exadata systems, database server updates are automatically rolled back to a working state on a previous release if the update fails. This ensures that the system can be restored to a working state in the event of a failed update. Additionally, storage server updates are also automatically rolled back to a previous release in the event of a failed update.
This is documented in the Oracle Exadata Database Machine X9M Implementation Essentials official text book and more information can be found on the Oracle support website [1][2].


NEW QUESTION # 41
You have been asked by Oracle Support to check the firmware of the hard & flash disks in a storage server. Which cellcli command should you use to get this information?

  • A. list celldisk attributes name, deviceName, diskType, physicalFirmware
  • B. list physicaldisk attributes name, deviceName, diskType, physicalFirmware
  • C. list devices attributes name, deviceName, diskType, physicalFirmware
  • D. list cell attributes name, deviceName, diskType, physicalFirmware

Answer: B


NEW QUESTION # 42
How do ASM failure groups provide redundancy?

  • A. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
  • 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. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.

Answer: D

Explanation:
According to Oracle's documentation12, ASM failure groups provide redundancy by storing mirror copies of data on different disks or storage servers. When ASM allocates an extent for a normal redundancy file, ASM allocates a primary copy and a secondary copy. ASM chooses the disk on which to store the secondary copy so that it is in a different failure group than the primary copy1. This way, if one disk or storage server fails, ASM can still access the data from another failure group2.
Therefore, the statement that is true about how ASM failure groups provide redundancy is:
Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.


NEW QUESTION # 43
Which statement is FALSE about the OEDA command line interface (OEDACU)?

  • A. OEDACU has Edit mode and Deploy mode.
  • B. Add or remove additional databases.
  • C. Add nodes to and remove nodes from a VM cluster.
  • D. Resize Oracle ASM disk groups.
  • E. Support ZDLRA life cycle management operation.
  • F. Add or remove Oracle Database home directories.

Answer: E

Explanation:
The Oracle Exadata Deployment Assistant Command Line Interface (OEDACU) supports a variety of configuration and lifecycle management tasks for Exadata systems, such as adding or removing nodes, resizing ASM disk groups, and managing Oracle Database home directories. However, it does not support lifecycle management for the Zero Data Loss Recovery Appliance (ZDLRA), as this device requires different management tools specific to its backup and recovery functions .


NEW QUESTION # 44
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