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Free Oracle 1Z0-468 Exam Questions (page: 3)

Page 3 of 19
PDF with 75 Questions

Your application will store data in two partitioned caches, each configured for one backup. You have calculated the total amount of data to be 10 GB for the first cache, and 3 GB for the second cache.
You plan to run 10 cache servers in total.
What is the minimum recommended JVM heap size for each cache server?

  1. 512 GB
  2. 1 GB
  3. 2 GB
  4. 4 GB

Answer(s): C

Explanation:

When considering heap size, it is important to find the right balance. The lower bound is determined by per-JVM overhead (and also, manageability of a potentially large number of JVMs). For example, if there is a fixed overhead of 100MB for infrastructure software (for example, JMX agents, connection pools, internal JVM structures), then the use of JVMs with 256MB heap sizes results in close to 40% overhead for non-cache data. The upper bound on JVM heap size is governed by memory management overhead, specifically the maximum duration of GC pauses and the percentage of CPU allocated to GC (and other memory management tasks).



Which type of appliance would you use to package custom applications into an appliance?

  1. WebLogic Server appliance
  2. external appliance
  3. generic appliance
  4. database appliance
  5. Oracle Tuxedo appliance

Answer(s): A



Which statement describes the difference between the Runtime Analyzer and JRockit Flight Recorder?

  1. Only Runtime Analyzer allows detailed heap analysis.
  2. Only Flight Recorder allows "back-in-time" analysis.
  3. Thread deadlock analysis is not possible in Flight Recorder.
  4. Flight Recorder cannot be run in an "always-on" mode.
  5. Flight Recorder causes significantly higher processor overhead than Runtime Analyzer.

Answer(s): B



When an object placed into a cache implements the Java Runnable interface, Coherence will _______________.

  1. immediately schedule it to be an on the service thread of the cache in which it was placed
  2. do nothing; Coherence does not differentiate between types of value objects
  3. ultimately attempt to run the object on a free worker thread associated with the service of the cache in which the object was placed
  4. hand the object over to the Invocation service to invoke the run method

Answer(s): A



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