Verified 1z0-468 Dump 2021

NEW QUESTION 1
When an object placed into a cache implements the Java Runnable interface, Coherence will .

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

Answer: A

NEW QUESTION 2
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?

• A. 512 GB
• B. 1 GB
• C. 2 GB
• D. 4 GB

Answer: 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).
s:

NEW QUESTION 3
You are doing capacity planning for a Coherence application with one distributed cache (dcache), and one replicated cache (rcache). You have one index on dcache, and dcache has backup_count=1. Your requirement is that you must be able to tolerate one machine failure with no loss of data. You have three machines, each with 4 JVMs of 8 GB.
What three factors do you take into consideration in case of machine failure? (Choose three.)

• A. Each cache server will be responsible for more primary and backup data from dcache.
• B. The size of index data in each cache server is likely to grow.
• C. The size of rcache on each node will grow.
• D. Updates to rcache will result in more network traffic per machine.
• E. Updates to dcache will result in more network traffic per machine.

Answer: ABE

NEW QUESTION 4
You are using Coherence to store state data that gets read frequently and updated only occasionally. Only 100 or so clients are logged in at any time, and state data is retrieved at login. You are running out of physical memory on the cache server tier, but CPU and network utilization is low. You have 100 GB Solid-State Drives on every system, including clients. You would also like to provide faster access to state data for logged-in users.
Which configuration should you use for your system?

• A. Configure Elastic Data on your clients with a near cache.
• B. Configure a near cache on your client and a RAM Journal on your cache servers.
• C. Configure a near cache on your client and a Flash Journal on your cache servers.
• D. Because near caching does not work with Elastic Data, configure a near cache and an eviction policy on the cache servers.

Answer: C

NEW QUESTION 5
The performance of your query is very slow.
Which two actions would you take to diagnose potential bottlenecks? (Choose two.)

• A. Check that indexes are registered against the fields being queried.
• B. Monitor the task execution time.
• C. Use the QueryRecorder to see the query Trace and Explain plan.
• D. Check that indexes are cached against the fields being queried.
• E. Monitor the task performance time.

Answer: BD

NEW QUESTION 6
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?

• A. 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.
• B. Configure a “cache-miss-scheme” on the appropriate cache.
• C. 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.
• D. This can't be achieved with Coherence.

Answer: A

NEW QUESTION 7
What is the first step towards creating an appliance?

• A. introspection of an installed system
• B. introspection of a VM template
• C. fileset capture
• D. template creation

Answer: D

NEW QUESTION 8
Your application had experienced an OutOfMemoryError on one of the cache servers. You had configured the JVM to produce a heap dump when OutOfMemoryErrors occur. Your analysis of the heap dump indicates that approximately 90% of the heap is consumed by instances of com.tangosol.util.Binary.
What configuration change will reduce the number of com.tangosol.util.Binary instances?

• A. Introduce a near cache for all partitioned caches.
• B. Increase the size of the thread pool for all cache services.
• C. Increase the expiry delay on all distributed-scheme backing maps.
• D. Lower the high-unit threshold on all distributed-scheme backing maps.

Answer: B

NEW QUESTION 9
What three operations can an EM_PROVISIONONG_DESIGNER perform that an EM_PROVISIONONG_OPERATOR cannot? (Choose three.)

• A. Create profiles, components, and directives in the Software Library.
• B. Access provisioning profiles in the Software Library.
• C. Customize the default deployment procedure.
• D. Create deployment procedure templates.
• E. There is no difference in the type of operations that these two users can perform.

Answer: ACD

NEW QUESTION 10
What three components of WLS can be managed by the WLS Management Pack EE?

• A. Applications Deployments
• B. SOA Composites
• C. WLS Domains
• D. WLS Managed Servers
• E. Oracle ESB

Answer: ABC

NEW QUESTION 11
What is the primary purpose of the Middleware Diagnostics Advisor (MDA) included in WLS Management Pack EE?

• A. to automate the SQL tuning process by comprehensively exploring all the possible ways of tuning a SQL statement
• B. to facilitate proactive performance and availability management by auto-finding problems and suggesting solutions
• C. to find configuration problems by comparing WLS configuration to a Gold Image configuration
• D. to provide comprehensive advice on how to optimize schema design in order to maximize application performance
• E. to analyze the EM configuration and suggest configuration changes that will extend the stability of EM

Answer: B

Explanation:
Reduce problem resolution time through middleware diagnostics advisor which provides “root cause” findings in context of the most relevant configuration parameters and offers suggestions for each finding.
s:

NEW QUESTION 12
Which plug-in does Oracle Traffic Director require you to install to load balance HTTP requests to WebLogic Server?

• A. mod_wls
• B. mod_weblogic
• C. mod_wl_ohs
• D. No plug_in is required
• E. mod_ohs_wl

Answer: C

NEW QUESTION 13
Your data client query needs to produce a fast initial response. Which two approaches will optimize your query? (Choose two.)

• A. Use a LimitFilter to limit the result set returned.
• B. Use a near cache to cache results locally to be re-used.
• C. Wrap the filter by using a PartitionFilter.
• D. Re-order the filter criteria.
• E. Access the keys first and then the values.

Answer: BD

NEW QUESTION 14
Which four components are included in WLS Management Pack? (Choose four.)

• A. Real User Monitoring
• B. JVM Diagnostics
• C. Business Transaction Management
• D. Lifecycle Management
• E. Configuration Management
• F. Ops Center

Answer: BCDE

NEW QUESTION 15
What is the correct order of API calls to perform an end-to-end assembly deployment operation?

• A. UploadAssemblyArchive -> RegisterAssemblyArchive -> CreateAssemblyInstance -> DeployAssemblyInstance -> UndeployAssemblyInstance -> DeleteAssemblyInstance -> UnregisterAssemblyArchive -> DeleteAssemblyArchive
• B. CreateAssemblyInstance -> UploadAssemblyArchive -> RegisterAssemblyArchive -> DeployAssemblyInstance -> UndeployAssemblyInstance -> UnregisterAssemblyArchive -> DeleteAssemblyArchive -> DeleteAssemblyInstance
• C. UploadAssemblyArchive -> RegisterAssemblyArchive -> DeployAssemblyInstance -> UndeployAssemblyInstance -> UnregisterAssemblyArchive -> DeleteAssemblyArchive
• D. RegisterAssemblyArchive -> UploadAssemblyArchive -> DeployAssemblyInstance -> UndeployAssemblyInstance -> DeleteAssemblyArchive -> UnregisterAssemblyArchive

Answer: B

NEW QUESTION 16
What two sources can be used to provision a WLS domain? (Choose two.)

• A. WebLogic Home Gold Image
• B. TAR file on network desktop
• C. TAR file on local desktop
• D. WebLogic Domain Provisioning Profile
• E. Middleware Home Gold Image

Answer: CE

NEW QUESTION 17
Which three generational spaces make up the HotStop heap? (Choose three.)

• A. Young Generation
• B. Internal Generation
• C. Old Generation
• D. Permanent Generation
• E. Persistent Generation

Answer: ACD

NEW QUESTION 18
With which WLS license is WLS Management Pack EE included?

• A. WebLogic Suite
• B. WebLogic Server Standard Edition
• C. WebLogic Server Enterprise Edition
• D. WebLogic Server EE or WebLogic Suite
• E. WLS Management Pack is not included in any of the WLS packs

Answer: C

NEW QUESTION 19
Which two components are required as part of any EM deployment? (Choose two.)

• A. Oracle Management Service
• B. Oracle Management Repository
• C. Oracle Ops Center
• D. BI Publisher
• E. Software Library

Answer: AB

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

NEW QUESTION 20
What three components are not part of EM and require separate installations? (Choose two.)

• A. BTM Engine
• B. RUEI Engine
• C. JVM Diagnostics Engine
• D. Application Discovery and Performance Management Engine
• E. Ops Center

Answer: DE

NEW QUESTION 21
Which three metrics are commonly used to evaluate garbage collector performance? (Choose three.)

• A. Throughput
• B. Pause time
• C. Method area
• D. Native threads
• E. Heap size

Answer: ABE

Explanation:
http://www.oracle.com/technetwork/java/javase/tech/memorymanagement-whitepaper-1- 150020.pdf(page 5, performance metrics)

NEW QUESTION 22
A Coherence node dies and is removed from a cluster.
What two actions occur if that node was part of a distributed cache where backup_count = 1? (Choose two.)

• A. Access is blocked to all operations while the cluster is rebalanced.
• B. Data is re-partitioned so that all data is accessible again.
• C. Partitions are moved so that the data is balanced among remaining nodes.
• D. Backup partitions are promoted to be primary, and new backups are created.

Answer: AC

NEW QUESTION 23
HOTSPOT
Which two statements are true about the HotSpot Concurrent Garbage Collector? (Choose two.)
MISSING

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
MISSING

NEW QUESTION 24
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