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100% Pass Guarantee PassLeader 1Z0-485 Dumps with VCE and PDF for Free (Question 31 – Question 35)

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QUESTION 31
Which two migration will result in the least down time for a physical or logical migration of a database with active users during the migration?

A.    using GoldenGate
B.    using SQL Developer migration tools
C.    using Data Guard Physical Standby
D.    using cross-platform transportable tablespaces
E.    using incremental cross-platform RMAN restore

Answer: AD

QUESTION 32
If your customer wants to save storage space by compressing tables that are read frequently but rarely updated, which compression technique would you recommend?

A.    OLTP
B.    ARCHIVE HIGH
C.    QUERY HIGH
D.    ARCHIVE LOW
E.    BASIC

Answer: B

QUESTION 33
Your customer has purchased their brand new Exadata Database Machine X3-2 Full rack to achieve 20-TB-per-hour backups on their 300 TB database. You have been called to determine why they are not able to achieve even half that rate. Use the information in the image below to identify two reasons their backups are still slow.
passleader-1Z0-485-dumps-331

A.    LVM snapshots are not configured properly on the Database Server.
B.    The Media Server to Tape Library transfer is causing a bottleneck.
C.    The number of tape drives is causing a bottleneck.
D.    Exadata backups are being performed using RMAN over the 10 Gigabit Ethernet network.
E.    The number of database servers is causing a bottleneck.

Answer: BC
Explanation:
The following bottlenecks will be reached first if using InfiniBand fabric to media server:
1. Media server to tape library SAN transfer rate.
2. Number of tape drives.

QUESTION 34
Which statement is true about Oracle compression?

A.    A non-partitioned table can use Advanced Compression and Hybrid Columnar Compression concurrently.
B.    A partitioned table can define the use of Advanced Compression or Hybrid Columnar Compression for each partition.
C.    Hybrid Columnar Compression can be defined for a single column.
D.    A partitioned table can use only Advanced Compression or only Hybrid Columnar Compression.

Answer: D
Explanation:
D: It is recommended that HCC be enabled on tables or partitions with no or infrequent DML operations. If frequent DML operations are planned on a table or partition, then the Oracle Advanced Compression Option is better suited for such data.

QUESTION 35
Which statement is true about instance caging setup?

A.    Instance caging is the right approach to make sure that database instances are not stealing memory from each other.
B.    The CPU Resource Manager and IORM need to be enabled to make instance caging to work as expected.
C.    Database instances need to be restarted to make changes to cpu_count effective.
D.    For a system with 16 threads, the sum of cpu_count for all databases should not be higher than 32 to prevent oversubscribing.
E.    The init.org parameter resource_manager_plan should be set.

Answer: D
Explanation:
– In 11.2G there is new option called “Instance Caging” which enables to limit number of CPUs which can be seen/used by a database.
– Enabling Instance Caging
1. Manually set dynamic parameter cpu_count on instance level. As default this parameter is set to maximum number of cpu available on a hosts.
# alter system set cpu_count=2;
2. Enable any resource manager plan that manages CPU. Most easy is to turn on default Oracle plan DEFAULT_PLAN.
# alter system set resource_manager_plan=DEFAULT_PLAN;
– Provisioning CPU
There are generally 2 ways to distribute your CPU between databases Partitioning sum of all CPUs assigned to all your databases equals number of CPUs on a host. Databases don’t interfere with each other. Over-provisioning sum of all CPUs assigned to all your databases is higher that number of CPUs on a host. Databases can impact on each other performance.


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