1z0-468: Oracle Cloud Application Foundation Essentials

What is the difference between Entry Processors and Aggregators?

Entry Processors require a key or a set of keys, whereas Aggregators require filters.
Entry Processors can skip the network by executing against near caches directly, whereas Aggregators must execute on storage members.
Entry Processors are better suited to Map-Reduce operations than Aggregators.
Aggregators are optimized for read-only access, whereas Entry Processors can modify cache entries.

Correct answer: D

Explanation:

Reference: https://www.c2b2.co.uk/middleware-blog/do-coherence-aggregators-failover.php

Which statement about JRockit Discovery Protocol (JDP) is true?

JDP enables network auto discovery of JVMs.
JDP is a subset of HTTP.
JDP can be used by application to exchange serialized data between JVMs.
JDP was initially introduced in the HotSpot VM 1.5.

Correct answer: A

Explanation:

Reference: https://books.google.com.pk/books?id=Wyu4XHQQeFwC&pg=PT418&lpg=PT418&dq=Jrootkit+discovery+protocol+enables+network+auto+discovery+of+JVMs&source=bl&ots=fwYlTNHe_J&sig=uiQ691dg60y4N7wPLhZu01oBr60&hl=en&sa=X&redir_esc=y#v=onepage&q=Jrootkit%20discovery%20protocol%20enables%20network%20auto%20discovery%20of%20JVMs&f=false

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

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

Correct answer: B

Explanation:

Reference: https://docs.oracle.com/cd/E15289_01/doc.40/e15070/introduction.htm

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

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

Correct answer: A

Which change cannot be made in an assembly at deployment time?

setting the appliance’s memory and CPU requirements
changing the listening port of the product
not deploying an appliance by setting its target count to zero
not deploying an appliance by removing it from the assembly

Correct answer: A

An application frequently requests data (from s Coherence cache configured with a cache loader) that may not be available in the underlying data source. The cost of looking up data via the cache loader is expensive in terms of time and resources.

To reduce these costs, which configuration should be used to cache the notion that an entry is not available?

Modify the application to maintain a “misses” cache to keep track of the entries that were expected to be found in the other cache, but were recently not found.
Configure a “cache-miss-scheme” on the appropriate cache.
Modify the cache loader to maintain a “map” of entries not found, and consult this map before attempting to load an entry from the external source.
This can't be achieved with Coherence.

Correct answer: A

Explanation:

Reference: https://docs.oracle.com/cd/E24290_01/coh.371/e22837/appendix_cacheconfig.htm#COHDG357

Which system property is used to customize a Coherence deployment configuration for different environments?

tangosol.coherence.cacheconfig
tangosol.coherence.site
tangosol.coherence.management
tangosol.coherence.override

Correct answer: A

Explanation:

Reference: http://docs.oracle.com/cd/E15357_01/coh.360/e15723/gs_config.htm#COHDG5011

Which two actions can be used to create/add an index in Coherence? (Choose two.)

ValueExtractor
Comparator
QueryMap
MapIndex
SimpleMapIndex

Correct answer: AC

Explanation:

Reference: https://coherence.java.net/assets/pdf/2011-11-04-Alexey-Ragozin-Advanced-Coherence-Indexes.pdf

With which WLS license is WLS Management Pack EE included?

WebLogic Suite
WebLogic Server Standard Edition
WebLogic Server Enterprise Edition
WebLogic Server EE or WebLogic Suite
WLS Management Pack is not included in any of the WLS packs

Correct answer: C

Explanation:

Reference: http://www.oracle.com/technetwork/oem/soa-mgmt/ds-em12c-wls-mgmt-pack-ee-1552456.pdf

Which two components are required as part of any EM deployment? (Choose two.)

Oracle Management Service
Oracle Management Repository
Oracle Ops Center
BI Publisher
Software Library

Correct answer: AB

Explanation:

Reference https://docs.oracle.com/cd/B19306_01/em.102/b40103/pre-installation_requirements.htm#CHDEEJEB

Vendor:	Oracle
Exam Code:	1z0-468
Exam Name:	Oracle Cloud Application Foundation Essentials
Date:	Feb 22, 2019
File Size:	115 KB

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