1z0-485 Free Practice Test

Which three statements accurately describe update of software on Exadata Database Machine?

1. A. The Oracle Database patchset software (for example, 11.2.0.3) requires the Exadata- specific version.
2. B. Rolling patching is faster than non-rolling patching, but database down time is longer.
3. C. The Oracle Database software on Exadata is updated using standard OPatch and the Oracle Universal Installer.
4. D. Running Exadata with different storage server software versions is supported, but should be minimized to rolling patching scenarios.
5. E. The database server operating system software (other than kernel and OFED) may be installed or updated from non-Exadata sources
6. F. Storage server updates require access to an Unbreakable Linux Network (ULN) based repository.

Correct Answer: CDF
C:
* Oracle offers two utilities for software deployment: Oracle Universal Installer to install Oracle products OPatch to apply interim patches
F: When storage cells are patched, there is almost always a set of storage server patches that need to be applied to the Exadata Compute Nodes as well. Historically, these were called “minimal packs,” but recent improvements to the compute node patching process deliver these updates using yum channels on Oracle’s Unbreakable Linux Network (ULN).
Incorrect:
Not B: Rolling patching has no downtime.

Which two statements are true about Exadata memory capabilities?

1. A. X3-8 can be purchased in a Half Rack configuration with 2 TB of memory.
2. B. X3-2 memory can be expanded to 512 GB per node from 256 GB.
3. C. X3-2 memory can be upgraded to use Flash in the compute nodes.
4. D. X3-8 memory is fixed at 4 TB per a Rack.
5. E. X3-2 can be purchased in a Half Rack configuration with 256 GB per node.

Correct Answer: DE
D: ORACLE EXADATA DATABASE MACHINE X3-8 features include: 160 CPU cores and 4 TB of memory for database processing
E: Database servers X3-2
A third generation was announced in 2012. Each Database Server with 2 x Eight-Core Intel Xeon E5-2690 Processors (2.9 GHz)
128 GB Memory (expandable to 256GB)

Identify the correct steps required to upgrade a 1/8th rack of Exadata to a 1/4th rack.

1. A. Remove the doors of the 1/8th rack.Add the new servers.Cable the Database Servers in the rack.Cable the Exadata Storage Servers in the rack.Close the rack.
2. B. Activate all cores by using a software command.Activate all hard drives and flash drives.Create the grid disks.Expand the Oracle ASM diskgroups.Review the new configuration.
3. C. Remove the doors of the 1/8th rack.Add an additional Sun Datacenter InfiniBand Switch.Add the new servers.Cable the Database Servers in the rack.Cable the Exadata Storage Servers in the rack.Close the rack.Configure the new hardware.
4. D. Activate all cores by using a software command.Activate all hard drives and flash drives.

Correct Answer: B
Not A: no need to remove doors. Not C: No additional Infiband Switch needed. Note:
* Database Machine Upgrades

* Database Machine Components and Upgradeability

Which two statements are true about enabling write-back flash cache?

1. A. When enabling write-back flash cache in a non rolling manner, it is important to ensure that asmdeactivatonoutcome is set to YES and asmModestatus is set to ONLINE for all grid disks.
2. B. Before using write-back flash cache, you need to verify the minimum required versions.
3. C. Before write back-flash cache is enabled, you need to drop the Flash Cache first.
4. D. The setting flashCacheMode should be set to writeback by updating cellinit.ora and restarting cellsrv.
5. E. When enabling write-back flash cache in a rolling manner, dcli should be used to inactivate the grid disks on all cells first.

Correct Answer: BC
B: Exadata storage version 11.2.3.2.1 is the minimum version required to use this write back flash cache option.
C: Steps for Enabling Write back flash cache:
First of all, you don’t need the stop CRS or database (This is ROLLING method) ,you can do it cell by cell.
* drop flashcache
* Be sure asmdeactivationoutcome is YES is before disabling grid disk

Which three migration options are available when you migrate a database from the Big Endian format system to Exadata?

1. A. Data Pump Export and Import
2. B. transportable database
3. C. transportable tablespaces
4. D. Data Guard
5. E. Insert as Select

Correct Answer: BCD
Methods at a Glance:
* Data Guard Physical Standby
* Transportable Database (Note:732053.1)
* Transportable Tablespace (TTS)