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Q1.

Which two activities are supported on the storage servers in an Exadata Database Machine?

Achanging the root password

Bupgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure

Cinstalling an alternative package manager

Dupgrading the Storage Server software package using rpm

Econfiguring secure shell user equivalency for the cellmonitor user

Answer: B, D

See the explanation below.

Exadata Database Machine is a preconfigured and optimized for database workloads. The storage servers in an Exadata Database Machine are used to store database data, and support activities such as upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure and upgrading the Storage Server software package using rpm. These activities are related to maintain the storage servers performance and security. Changing the root password, installing an alternative package manager, and configuring secure shell user equivalency for the cellmonitor user are activities that can be performed on any Linux machine, but they are not specific to Exadata Database Machine.

Q2.

Which statement is true about the Persistent Memory Commit Accelerator?

APersistent Memory Commit Accelerator tracks changes to Persistent Memory Data Accelerator to ensure duplicate blocks are not written to Flash.

BPersistent Memory Commit Accelerator helps to further reduce redo log write latency by using Persistent Memory and Remote Direct Memory Access (RDMA).

CPersistent Memory Commit Accelerator copies redo log data from disk for faster redo apply on Data Guard Standby Databases.

DPersistent Memory Commit Accelerator contains logging information from all tiers of the software stack for rapid triage and diagnostics.

EPersistent Memory Commit Accelerator reduces redo log write latency by using Persistent Memory and RDMA before flushing to Flash then disk.
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.

Answer: E

Q3.

You have a script with several CELLCLI commands that must be executed on each cell in your Exadata full rack. The script must run on each cell simultaneously. How must you achieve this?

ACopy and execute the script on all storage servers using the EXACLI command.

BCopy the script to all storage servers using the dcli command and manually execute it on all storage servers using the EXACLI command.

CCopy and execute the script on all storage servers using the dcli command.

DCopy the script to all storage servers using the dcli command and manually execute it on each storage server using the DCLI command.

ECopy the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.

Answer: C

Q4.

How is Exadata Secure RDMA Fabric isolation used in X9M-2 with virtualization enabled?

AWith Secure Fabric isolation, each Storage Server runs multiple KVM guests each dedicated to a Database VM cluster using a dedicated network partition and VLAN ID. This provides security and isolation between multiple tenants or VM clusters.

BWith Secure Fabric isolation, each Database VM Guest uses a dedicated network partition and VLAN ID for client networking between application servers. This improves security by preventing man in the middle attacks.

CWith Secure Fabric isolation, each Database VM Cluster uses a dedicated network partition and VLAN ID for Data Guard networking between the primary and disaster recovery Exadata racks. This improves security by isolating data guard traffic onto an encrypted network between data centers.

DWith Secure Fabric isolation, each Database VM cluster uses a dedicated network partition and VLAN ID for cluster networking between the database servers in the VM Cluster. This provides security and isolation between multiple tenants or VM clusters.

Answer: D

See the explanation below.

Exadata Secure RDMA Fabric isolation is a feature that allows you to use virtualization on the X9M-2 platform while maintaining security and isolation between multiple tenants or VM clusters. Secure Fabric isolation works by creating a dedicated network partition and VLAN ID for each Database VM cluster, which is used for cluster networking between the database servers in the VM Cluster. This ensures that the network traffic of each VM cluster is isolated from the others, and it prevents unauthorized access to the data or resources of other VM clusters. Secure Fabric isolation can also be used for other purposes such as client networking, Data Guard traffic, but it's mainly used to provide security and isolation between multiple tenants or VM clusters.

Q5.

You have been notified by your Network Administrator that an upstream switch has been replaced due to a hardware fault. Which command verifies that the client network on your Exadata X9M-2 Database Server is available via both client switches?

Aifconfig -a legrep 're0| re1'

B/opt/oracle.SupportTools/ibdiagtools/checkbadlinks.p1 ---all

Cnetstat -rn

Dcat /proc/net/bonding/bondeth0

Answer: B

See the explanation below.

The checkbadlinks.pl script is a tool provided with the Exadata X9M-2 Database Server that allows you to verify the status of the InfiniBand links between the Database Server and the client switches. This script checks for bad links, and it can be used to identify any issues with the client network connectivity. To use the script, you can navigate to the directory where it is located, which is /opt/oracle.SupportTools/ibdiagtools/ and execute the command ./checkbadlinks.pl -all. This will give you a summary of the status of the links and it will indicate if there are any bad links. This command will check the client network on your Exadata X9M-2 Database Server is available via both client switches. Other commands like ifconfig, netstat and cat are not relevant to check the client network on Exadata X9M-2 Database Server

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