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Home Oracle 1z0-485

Oracle 1z0-485 Exam Practice Questions (P. 4)

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Question #16
What are two choices that a customer must make that impact diskgroup creation?
  1. A
    What is the level of redundancy required?
  2. B
    What OS will be run?
  3. C
    Where will disk backups be written?
  4. D
    How many databases will run on the cluster?

Correct Answer:
AC
Once you identify candidate grid disks, use the CREATE DISKGROUP command to create your ASM disk groups.
Here are some of the more important considerations to think about when creating ASM disk groups on Exadata:
* (A) When capacity planning, take your redundancy specification into consideration. Normal redundancy will have the effect of reducing your usable storage to half the raw capacity, and high redundancy will shrink it to a third of your raw disk capacity.
* Simplicity is best on Exadata. Using wild-carded CREATE DISKGROUP syntax not only offers the most terse command syntax, but also ensures your ASM disk groups are spread evenly across your Exadata Storage Server disks.
* Take the time to plan grid disk prefix names and overall grid disk configuration in the context of your desired ASM disk group design.
* Make sure to set the appropriate compatible.asm and compatible.rdbms attributes when creating ASM disk groups.
* Whenever possible, use a 4 MB extent size when creating disk groups on ASM storage.

Question #17
When would be the best time to run an Exadata health check (exachk)?
  1. A
    before patching, before upgrades, before backups, and on a regular basis
  2. B
    after patching, after upgrades, and after backups
  3. C
    only when advised by Oracle Support
  4. D
    before and after patching, when advised by Oracle Support, andona regular basis
  5. E
    only after a hardware failure
  6. F
    monthly and after a hardware failure

Correct Answer:
D
#1: Check for updates frequently.
#2: Execute before & after system changes.
#3: Make part of regular planned maintenance

Question #18
Which two statements describe correct network configuration for Exadata Database Machine?
  1. A
    The InfiniBand network subnet manager runs on all database servers to achieve High Availability.
  2. B
    Oracle Clusterware communication is configured to use the management network.
  3. C
    The InfiniBand network interfaces on Linux servers are configured using active-passive bonding.
  4. D
    Database connections to the SCAN listener route through the Ethernet switch in the Exadata rack.
  5. E
    Database servers are deployed with three logical network interfaces configured: management, client access, and private.

Correct Answer:
CD

Question #19
How would you execute CellCLI commands and scripts?
  1. A
    using SQL*Plus on database nodes
  2. B
    by CellCLI commands executed on the database nodes
  3. C
    using third party tools after installing the CellCLI RPM plug-in
  4. D
    directly executing the commands and scripts on the Exadata storage cell
  5. E
    remotely by connecting to Port 1521 using SSL

Correct Answer:
D
The storage cells in Exadata Database Machine are managed via two tools called CellCLI and DCLI.

Question #20
Which two statements are true about migrating your database to Exadata?
  1. A
    Because Exadata uses InfiniBand, in order to migrate your database to Exadata, you must have InfiniBand on the system that you are migrating from.
  2. B
    Using Data Guard Physical Standby to migrate from an 11.1 database to Exadata is beneficial because it allows you to adopt HCC during migration.
  3. C
    ASM and database best practice configuration supplied during Exadata deployment should be retained during and after migration,
  4. D
    Logical migration methods allow more flexibility than physical methods to change the database structure for best performance.
  5. E
    All indexes should be dropped when migrating to Exadata.

Correct Answer:
CD
References:

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