1z0-902 Practice Test

Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?

A.

ZFSSA may connect directly to the Exadata 100Gb RoCE network switches.

B.

Top of Rack (ToR) switches are managed as part of the hardware stack and software levels are upgraded during the patching process.

C.

When backing up multi-rack systems, sharing Exadata X9M switches is recommended.

D.

ZFS Snapshots can provide rapid cloning of development and test environment.

Your customer needs to ensure that their data is available on the Exadata machine during updates. The customer wants to be able to update one server at a time but still be protected against single-node server failure. What ASM redundancy level should they use?

A.

Normal

B.

Sparse

C.

High

D.

External

E.

Extended

How do ASM failure groups provide redundancy?

A.

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.

B.

Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.

C.

They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.

D.

Extended Redundancy mirrors data across data centers providing the highest levels of data protection.

For which four component failures on an X9M Database Machine does Auto Service Request (ASR) raise service requests?

A.

RoCE network interface cards in the storage servers

B.

fans in the storage servers

C.

Cisco RDMA over Converged Ethernet (RoCE) switches

D.

RoCE network interface cards in the database servers

E.

power distribution units

F.

Cisco management switch

G.

power supplies in the database servers

Which statement is true about the Persistent Memory Commit Accelerator?

A.

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

B.

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

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

E.

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