VALID 1Z0-902 Exam Dumps For Certification Exam Preparation [Q22-Q44]

VALID 1Z0-902 Exam Dumps For Certification Exam Preparation

1Z0-902 Dumps PDF 2023 Strategy Your Preparation Efficiently

Oracle 1z1-902 exam is intended for professionals who have experience working with Oracle Database and are familiar with Oracle Exadata Database Machine X8M architecture, features, and capabilities. Candidates who pass the exam demonstrate their ability to install, configure, and manage Oracle Exadata Database Machine X8M systems, including hardware, software, and storage components. They are also expected to have a deep understanding of Oracle Exadata Database Machine X8M best practices and advanced features, such as Oracle Database In-Memory and Oracle Automatic Storage Management (ASM).

 

NEW QUESTION # 22
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?

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

Answer: C,D

Explanation:
Option C shows the number of read hits from PMEM cache on storage servers which indicates how much data was served from PMEM instead of flash or disk1.
Option E shows detailed information about PMEM cache such as size, utilization, hit ratio, read latency and write latency2.

NEW QUESTION # 23
Examine this list of software components:
1. Oracle KVM Guest
2. Oracle Enterprise Manager Agent (OMA)
3. ASM instance
4. RDBMS instance
5. Automatic Diagnostic Repository Command Interpreter (ADRCI)
6. CELLCLI
7. Cell Server(CELLSRV)
8. diskmon
9. Restart Server (RS)
10. Management Server (MS)
What is the correct location where these software components can run in the standard Exadata Database Machine deployment?

• A. 1, 2, 3, 4, 5, 8, 9 and 10 run on the database servers; 5, 6,7, 9 and 10 run on the Exadata storage servers.
• B. 1, 2, 3, 4, 8 and 9 run on the database servers; 5, 6, 7, 9 and 10 run on the Exadata storage servers.
• C. 3, 4, 8, and 10 run on the database servers; 1, 2, 5, 6, 7 and 9 run on the Exadata storage servers.
• D. 1, 2, 3, 4, 9 and 10 run on the database servers; 5, 6, 7, 8, 9, and 10 run on the Exadata storage servers.
• E. 2, 3, 4, 8, and 10 run on the database servers; 1, 5, 6, 7and 9 run on the Exadata storage servers.

Answer: A

Explanation:
Oracle KVM Guest: This is a virtual machine that runs on top of Oracle Linux KVM hypervisor. It can be used to run Oracle Database or other applications on Exadata Database Machine2. Therefore, it runs on the Database Servers.
Oracle Enterprise Manager Agent (OMA): This is a software agent that communicates with Oracle Enterprise Manager Cloud Control and provides monitoring and management capabilities for Exadata Database Machine2. Therefore, it runs on both Database Servers and Storage Servers.
ASM instance: This is an instance of Oracle Automatic Storage Management (ASM), which is a volume manager and a file system for Oracle Database files. It manages disk groups that span across multiple Storage Servers2. Therefore, it runs on the Database Servers.
RDBMS instance: This is an instance of Oracle Database that processes SQL statements and executes transactions. It uses ASM disk groups to store data files, control files, redo log files, etc2. Therefore, it runs on the Database Servers.
Automatic Diagnostic Repository Command Interpreter (ADRCI): This is a command-line tool that enables you to view diagnostic data stored in the Automatic Diagnostic Repository (ADR). ADR is a file-based repository for database diagnostic data such as trace files, alert logs, etc2. Therefore, ADRCI runs on both Database Servers and Storage Servers, depending on where the ADR is located.
CELLCLI: This is a command-line interface that enables you to configure and manage Exadata Storage Server Software. It allows you to perform tasks such as creating disk groups, monitoring cell health, applying patches, etc2. Therefore, it runs on the Storage Servers.
Cell Server(CELLSRV): This is a process that runs on each Storage Server and handles I/O requests from the Database Servers. It implements Exadata Smart Scan , which offloads data-intensive SQL operations from the Database Servers to the Storage Servers2. Therefore, it runs on the Storage Servers.
diskmon: This is a process that monitors the status of disks and flash devices on each Storage Server. It reports disk failures and performs automatic disk reclamation2. Therefore, it runs on the Storage Servers.
Restart Server (RS): This is a process that manages automatic restarts of critical processes such as CELLSRV , MS , or OMA in case of failures. It also handles graceful shutdowns and startups of all processes on each server2. Therefore, it runs on both Database Servers and Storage Servers.
Management Server (MS): This is a process that provides management services for each server such as collecting metrics , logging events , executing commands from CELLCLI , etc2. Therefore, it runs on both Database Servers and Storage Servers

NEW QUESTION # 24
A new Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA PDUs is being installed in a Data Center. However, the Data Center is only providing enough power for a single cable from each PDU.
Which statement is correct?

• A. The power cables from the servers to the PDUs can be rearranged inside the rack following OECA guidance to utilize a single PDU power cable.
• B. The installation can go ahead, no change is required.
• C. A splitter cable can be used to provide power to all PDU cables.
• D. The installation cannot proceed until two power feeds are available per PDU.

Answer: B

Explanation:
According to the Oracle Exadata Database Machine X9M-2 Data Sheet1, each PDU has two power input cables that can be connected to separate power sources for redundancy. However, if only one power source is available per PDU, then a single cable can be used to provide sufficient power for normal operation.
https://www.oracle.com/a/ocom/docs/engineered-systems/exadata/exadata-x9m-2-ds.pdf

NEW QUESTION # 25
What are two recommended configuration best practices for backup and recovery on Exadata?

• A. Placing the backup network on dedicated switches installed in the top of the rack (ToR) has the benefits of isolating the backup network from other workloads and providing a greater level of control.
• B. Even if the backup was limited to writing to four tape drives, eight channels could be specified to expedite the restore process.
• C. The internal Recovery Appliance backup and restore processing is optimized when the RMAN FILESPERSET parameter is set to 1 for the level 1 incremental backup set.
• D. When off-site long-term backup retention is needed, use Oracle Database Backup Cloud Service as a low-cost, offsite scalable storage for a disaster recovery solution.

Answer: A,C

Explanation:
A recommended configuration best practice for backup and recovery on Exadata is to place the backup network on dedicated switches installed in the top of the rack (ToR). This provides a greater level of control and isolates the backup network from other workloads. Additionally, even if the backup is limited to writing to four tape drives, it is recommended to specify eight channels to expedite the restore process.
Another best practice is to set the RMAN FILESPERSET parameter to 1 for the level 1 incremental backup set. This will optimize the internal Recovery Appliance backup and restore processing. Finally, if off-site long-term backup retention is needed, Oracle Database Backup Cloud Service should be used as a low-cost, offsite scalable storage solution for a disaster recovery solution.

NEW QUESTION # 26
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 must be invoked with the -rolling argument. Each component type must be upgraded independently of the other.
• C. patchmgr will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption.
• D. patchmgr cannot apply updates in a rolling manner, you must manually apply patches with the dbnodeudpate and cellupdate tools if high availability is required.

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 # 27
You are going to create an ACFS Filesystem for use as a staging area for data loads. Examine the following commands:

What steps and in which order should they be executed?

• A. 6, 8, 3, 4, 2, 1
• B. 6, 3, 1, 9, 7, 8
• C. 6, 2, 1, 8, 4, 5
• D. 6, 1, 2, 7, 5, 8

Answer: B

NEW QUESTION # 28
A new Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA PDUs is being installed in a Data Center. However, the Data Center is only providing enough power for a single cable from each PDU.
Which statement is correct?

• A. The installation cannot proceed until two power feeds are available per PDU.
• B. The power cables from the servers to the PDUs can be rearranged inside the rack following OECA guidance to utilize a single PDU power cable.
• C. A splitter cable can be used to provide power to all PDU cables.
• D. The installation can go ahead, no change is required.

Answer: A

Explanation:
An Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA PDUs would typically require two power feeds per PDU, one for each of the two power distribution units (PDUs) in the rack. A single power feed per PDU is not sufficient to provide the necessary power to the servers and storage in the rack.
The installation cannot proceed until two power feeds are available per PDU. According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], it is recommended that each PDU should have at least two power feeds from different power sources in the data center. This is to ensure redundancy and avoid any power interruption due to power failure on one of the power sources. Splitter cables are not recommended, as they can reduce efficiency and increase the risk of overheating. Rearranging the power cables within the rack is not recommended either, as it does not provide the necessary redundancy for the PDU.

NEW QUESTION # 29
Which two statements are true for the Oracle Exadata Configuration Assistant (OECA)?

• A. OECA facilitates PDU power selection initially and after equipment addition.
• B. OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.
• C. OECA reconfigures the size of disk groups and recreates grid disks.
• D. OECA allows one XT storage server in the configuration.
• E. OECA extends the hardware for the elastic configuration only.

Answer: A,E

Explanation:
B and E are true statements for the Oracle Exadata Configuration Assistant (OECA). OECA facilitates PDU power selection initially and after equipment addition, and it allows for the elastic configuration of the hardware. It does not reconfigure the size of disk groups or recreate grid disks, nor does it allow for a single XT storage server in the configuration. The "Add Equipment" input option does allow for the allocation of RU slots for customer equipment.
Reference for this information can be found in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources.
Search results: [1] Oracle Exadata Database Machine X8-2 [1][2]: Configuration Assistant Guide ... The Oracle Exadata Configuration Assistant (OECA) is a web-based tool that can ... [2] The Oracle Exadata Configuration Assistant (OECA) is a web-based tool that can be used to ... Add Equipment: This input option allows you to allocate RU slots for ... [3] Oracle Exadata Database Machine X7-2 and X7-2L Installation Guide ... The Oracle Exadata Configuration Assistant (OECA) is a web-based tool that can ... [4] The Oracle Exadata Configuration Assistant (OECA) is a web-based tool that can be used to ... Power Selection [1][2]: This input option allows you to select PDU power initially ... [5] Oracle Exadata Database Machine X7-2 and X7-2L Installation Guide ... The Oracle Exadata Configuration Assistant (OECA) is a web-based tool that can ...

NEW QUESTION # 30
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 cannot be used on Extreme Flash Storage Servers.
• D. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
• E. Before write-back flash cache is enabled, you need to drop the Flash Cache first.

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 # 31
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 cannot be used on Extreme Flash Storage Servers.
• D. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
• E. Before write-back flash cache is enabled, you need to drop the Flash Cache first.

Answer: B,E

NEW QUESTION # 32
Which are two correct statements about backing up Exadata Database Machine?

• A. Use a snapshot-based backup of an Oracle Exadata Database Machine database server software.
• B. Backup of the Oracle Cluster Registry, which also contains Voting Disk information, is automatically maintained on the file system of the first database server.
• C. Backing up Exadata Storage Server Software is critical for restoration.
• D. The M.2 disk is hot pluggable and can be replaced when the power is on, but you will have to restore the system data manually.
• E. For high availability, system area can be on the first two disks and M.2 devices.

Answer: B,C

Explanation:
[1] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 4: Oracle Clusterware [2] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 8: Oracle Exadata Storage Server Software [3] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 9: Oracle Exadata Storage Server Infrastructure
https://www.oracle.com/technetwork/database/availability/exadata-backup-recovery-bp-3633870.pdf

NEW QUESTION # 33
You are planning the monitoring configuration for your Exadata X9M Database Machine.
Which three components are monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins?

• A. the RDMA over Converged Ethernet (RoCE) switches
• B. ASM instances
• C. the Power Distribution Units (PDUs)
• D. the storage server ILOM
• E. Oracle clusterware on the database server
• F. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers

Answer: B,E,F

Explanation:
Exadata-specific Enterprise Manager Plug-Ins are used to monitor different components of the Exadata Database Machine.
1. ASM instances: The Automatic Storage Management (ASM) instances can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the storage space, disk usage, and performance of the ASM instances.
2. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers: The HCC ratios on Extended (XT) storage servers can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the compression ratios and performance of the storage servers.
3. Oracle clusterware on the database server: The Oracle clusterware on the database server can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the health and performance of the clusterware.

NEW QUESTION # 34
Which two activities are supported on the storage servers in an Exadata Database Machine?

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

Answer: B,D

Explanation:
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.

NEW QUESTION # 35
How is Exadata Secure RDMA Fabric isolation used in X9M-2 with virtualization enabled?

• A. With 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.
• B. With 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.
• C. With 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.
• D. With 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.

Answer: A

NEW QUESTION # 36
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. Multiple pluggable databases in one or more container databases on a Virtual Machine or Bare Metal cluster
• C. Multiple Databases on a cluster
• D. A single database with one or more schema per application
• E. Bare Metal deployment with one database per database server
• F. Multiple Virtual Machine clusters supporting a single database for greatest resource isolation

Answer: B,C,D

Explanation:
According to Oracle.com documents or resources, the three options that are available for database consolidation on Exadata are:
1. Multiple pluggable databases in one or more container databases on a Virtual Machine or Bare Metal cluster123.
2. A single database with one or more schema per application12.
3. Multiple Databases on a cluster12.
https://blogs.oracle.com/exadata/post/database-consolidation-why-and-how

NEW QUESTION # 37
What is the minimum Oracle Linux version required to support RoCE and Persistent Memory?

• A. Oracle Linux 7.9
• B. Oracle Linux 8.0
• C. Oracle Linux 7.5
• D. Oracle Linux 7.7

Answer: A

Explanation:
RoCE (RDMA over Converged Ethernet) and Persistent Memory are features that are supported by Oracle Linux. The minimum version of Oracle Linux required to support RoCE and Persistent Memory is Oracle Linux 7.9.
RoCE is a low-latency, high-bandwidth networking technology that enables fast data transfer between servers using converged Ethernet networks. It is supported by Oracle Linux 7.9 and later versions, which includes the necessary kernel modules and user-space libraries to enable RoCE.
Persistent Memory is a technology that allows data to be stored in non-volatile memory (NVM) devices, such as NVDIMMs (Non-Volatile Dual In-line Memory Modules), which can be accessed at near-DRAM speeds. Oracle Linux 7.9 and later versions include support for Persistent Memory, which includes kernel modules and user-space libraries to enable Persistent Memory.

NEW QUESTION # 38
Which three statements are true about Oracle Configuration Manager (OCM) for an Exadata Database Machine?

• A. It collects configuration information on demand.
• B. It is mandatory to install OCM on at least one database server.
• C. Collected configuration information can be uploaded automatically to Oracle.
• D. It collects configuration information automatically.
• E. It is mandatory to install OCM on all database servers.
• F. Collected configuration information can be uploaded manually to Oracle.

Answer: A,C,D

Explanation:
It collects configuration information automatically (B). OCM gathers detailed configuration information about a variety of designated Oracle products and components across an enterprise on a regular basis2.
It collects configuration information on demand . OCM can also collect configuration information manually when requested by the user or by Oracle Support2.
Collected configuration information can be uploaded automatically to Oracle (E). OCM can upload the collected configuration information to My Oracle Support automatically for analysis and support purposes3.

NEW QUESTION # 39
You are providing oversight for the delivery of a new Exadata Database Machine.
1. Stabilize the Exadata Rack.
2. Unpack Oracle Exadata Rack.
3. Review the safety guidelines.
4. Let the Exadata acclimatize for 24 hours.
5. Power on Exadata PDU A.
6. Place Exadata in its allocated space.
7. Power on Exadata PDU B.
What is the correct order of these steps?

• A. 2,6,1,4,3,7,5
• B. 2,3,4,6,1,7,5
• C. 3,2,6,1,4,7,5
• D. 3,2,6,4,1,7,5
• E. 4,3,2,6,1,7,5

Answer: B

NEW QUESTION # 40
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?

• A. Copy and execute the script on all storage servers using the dcli command.
• B. Copy the script to all storage servers using the dcli command and manually execute it on each storage server using the DCLI command.
• C. Copy and execute the script on all storage servers using the EXACLI command.
• D. Copy the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.
• E. Copy the script to all storage servers using the dcli command and manually execute it on all storage servers using the EXACLI command.

Answer: A

Explanation:
According to Oracle's documentation1, the Cell Control Command-Line Interface (CellCLI) utility is the command-line administration tool for Oracle Exadata System Software. It can be used to perform various tasks on Exadata Storage Servers, such as creating and managing objects, monitoring performance, and configuring alerts.
To run CELLCLI commands on multiple cells simultaneously, you can use the Distributed Command-Line Interface (dcli) utility2. The dcli utility allows you to execute commands or scripts on a group of cells or hosts in parallel. You can use the dcli utility to copy files from one cell or host to multiple cells or hosts using the -f option3. You can also use the dcli utility to execute commands or scripts on multiple cells or hosts using the -l option to specify a user name and the -g option to specify a file containing a list of cells or hosts3.
Therefore, to achieve your requirement of running a script with several CELLCLI commands on each cell in your Exadata full rack simultaneously, you must:
Copy and execute the script on all storage servers using the dcli command.

NEW QUESTION # 41
Which two statements are true about the initial storage configuration after the standard (non-virtualized) deployment of a new Exadata Database Machine with High Capacity storage servers?

• A. The sparse_<DBM_NAME> diskgroup is created automatically.
• B. The DATA_<DBM_Name> and RECO_<DBM_NAME> ASM diskgroups are built on with DATA on the outer-most tracks and RECO on the inner-most tracks of the physical disk.
• C. There is free space available on flashdisks inside the Exadata storage servers to configure Exadata Smart Flash Logs.
• D. There is free space available on the hard disks inside the database servers for possible extension of the /uoi file system.
• E. There is free space available on flashdisks inside the Exadata storage servers for possible use for storage indexes.

Answer: C,D

NEW QUESTION # 42
Which three steps are required to expand an Exadata X9M-2 Database Server with the lowest memory configuration available to the highest memory configuration?

• A. Memory cannot be expanded on Exadata X9M-2 Database Servers.
• B. Add 16x 64GB DIMMs.
• C. Add 12x 32GB DIMMs.
• D. Shutdown the Database Server if running.
• E. Add 16x 32GB DIMMs.
• F. Add 32x 64GB DIMMs.
• G. Add 12x 64GB DIMMs.
• H. Add 24x 32GB DIMMs.
• I. Remove existing memory modules.

Answer: B,D,I

Explanation:
1. Remove existing memory modules: Before adding new memory modules, the existing memory modules should be removed.
2. Add 16x 64GB DIMMs: The new DIMMs should be added, in this case is 16 DIMMs of 64GB each, which will expand the memory to the highest configuration available.
3. Shutdown the Database Server if running: The Database Server should be shutdown before adding new memory modules in order to prevent any possible data loss or corruption.
The steps required to expand an Exadata X9M-2 Database Server with the lowest memory configuration available to the highest memory configuration are as follows:
Shutdown the Database Server if running.
Remove existing memory modules.
Add 16x 64GB DIMMs.
For reference, the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book states that "the lowest memory configuration for the Exadata X9M-2 Database Servers is 384GB and the highest is 768GB [1]. The memory upgrade is done in increments of 64GB using 16x 64GB DIMMs".

NEW QUESTION # 43
Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?

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

Answer: A,D

Explanation:
1. 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.

NEW QUESTION # 44
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