Free Oracle Exadata Database Machine X9M Implementation Essentials Exam 1Z0-902 Exam Practice Test

How do ASM failure groups provide redundancy?

• 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.
• Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
• They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
• Extended Redundancy mirrors data across data centers providing the highest levels of data protection.

An Exadata X9M-2 Elastic Rack with 4 Database Servers and 8 HC Storage Servers and 3-phase 24kVA 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 splitter cable can be used to provide power to all PDU cables.
• 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.
• The installation cannot proceed until two power feeds are available per PDU.
• The installation can go ahead, no change is required.

Which statement is true about the Persistent Memory Commit Accelerator?

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

What are the two benefits of using Oracle Exadata Deployment Assistant (OEDA)?

• OEDA facilitates abstracting hardware.
• OEDA gathers configuration details and creates the Oracle Exadata Rack configuration file.
• OEDA is used for Oracle Exadata Database Machine, Zero Data Loss Recovery Appliance, Private Cloud Appliance, and SuperCluster.
• OEDA Web-based user interface cannot import OEDA XML configuration files created with the Java-based version of OEDA without conversion
• OEDA provides a CL1 which supports life cycle management tasks for Exadata systems only.

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?

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

What are two recommended configuration best practices for backup and recovery on Exadata?

• 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.
• Even if the backup was limited to writing to four tape drives, eight channels could be specified to expedite the restore process.
• 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.
• 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.

Examine these commands:

• Execute "crscti stop cluster -all" as the grid user from one database server.
• Execute "crscti stop cluster -all" as root from one database server.
• Power off all network switches.
• Execute "crscti stop cluster" as root from one database server.
• Execute "crscti stop cluster" as the grid user from one database server.
• Power off the rack using the power switches on the PDUs.
• Execute "shutdown -h now" on all database servers.
• Execute "shutdown -h now" on all Exadata storage servers.Which is the correct order or the required commands to completely power off an Exadata Database Machine in an orderly fashion?
• 5, 8, 7, and 6
• 4, 7, 8, 3, and 6
• 2, 8, 7, 3, and 6
• 2, 7, 8, and 6
• 1, 8, 7, 3 and 6

Which statement is true about the disks that are used in ASM diskgroups on the Exadata platform?

• In an Exadata storage server, each disk is placed into a separate failure group.
• The grid disks in ASM diskgroups must have similar performance characteristics in addition lo having the same size.
• Sparse diskgroups are virtual objects allocated from the DATA diskgroup.
• If High redundancy is selected, grid disks from the primary and secondary Exadata Database Machine must be specified.
• Extreme Flash (EF) and High Capacity (HC) disks can be mixed to any capacity within the same diskgroup.

What is the maximum DRAM capacity you can expand an X9M-2 DB Server?

• 1536GB
• 512GB
• 2048GB
• 768GB
• 1024GB
• 384GB

Which two statements are true about the IPTables firewall configuration on a new Exadata Database Machine after initial deployment?

• IPTables is installed and available but not configured or running on the storage servers.
• IPTables is configured and running with Oracle-supplied rules on the storage servers.
• IPTables is configured and running with Oracle-supplied rules on the database servers.
• IPTables is installed and available but not configured or running on the database servers.
• IPTables is installed and available but not configured on any server.