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1z0-485 Questions and Answers

Question # 1

Your customer would like to use DBFS in their Exadata environment. They are asking you for the key characteristic of DBFS on Exadata.

A.

DBFS in an Exadata environment is faster than an NFS mount system because of the Smart Scan performance gains.

B.

Tens of thousands of files are the perfect use case for DBFS on Exadata.

C.

DBFS offers tremendous I/O bandwidth.

Question # 2

After migrating from legacy disk-based configuration, which three approaches would you use to evaluate the efficiency of Exadata Flash Cache?

A.

Review the Flash Hit rate via cellcli metrics.

B.

Compare Optimized Physical Reads and Total Read Requests in Automatic Workload Repository (AWR).

C.

Review the IOSTAT data that is gathered from each compute node by OS Watcher.

D.

Evaluate the Smart Flash Logging efficiency metrics via CellCLI.

E.

Check I/O latency on large I/O to Temp in AWR.

Question # 3

When an Exadata Storage Server hard disk failure alert is received, what manual action must you take to restore the system to full redundancy?

A.

Replace the disk and run MegaCLI to rebuild the degenerate mirror.

B.

No manual action is required because Automatic Storage Management (ASM) fast mirror resync is automatic

C.

No manual action is required because ASM rebalancing isautomatic.

D.

Replace the disk and manually copy the mirror extents to the new drive.

E.

Run RMAN REPAIR FAILURE.

Question # 4

How would you execute CellCLI commands and scripts?

A.

using SQL*Plus on database nodes

B.

by CellCLI commands executed on the database nodes

C.

using third party tools after installing the CellCLI RPM plug-in

D.

directly executing the commands and scripts on the Exadata storage cell

E.

remotely by connecting to Port 1521 using SSL

Question # 5

What would be the best way to ensure that batch Jobs do not impact performance of online queries that use the same database?

A.

Configure IORM to disable Flash Cache usage for batch workload.

B.

Build a Database Resource Management Plan, giving priority to query workload.

C.

Deploy Instance Caging to control batch jobs.

D.

Configure and enable Parallel Query.

E.

Configure resourceplans by using the I/O Resource Manager on the storage cells, giving priority to query workload.

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