Free Oracle 1z0-468 Exam Dumps Questions & Answers

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

Consider the following code:

If the initial stock amount was 15, and 5 different clients (in different JVMs) attempted to execute the same code simultaneously, what would be the resulting level of stock?

• A.undefined, because of the lack of concurrency control
• B.20, because Coherence does implicit locking
• C.16, because of the lack of concurrency control
• D.15, because a concurrency control exception will be thrown

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

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.

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.2 GB
• C.4 GB
• D.1 GB