1z0-468 Free Practice Test

In which three scenarios would you use JRockit Mission Control? (Choose three.)

1. A. finding hot methods
2. B. static mode analysis
3. C. tracking latencies
4. D. heap analysis
5. E. debugging with breakpoints

Correct Answer: ACD

Consider the following code:
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1. A. 20, because Coherence does implicit locking
2. B. 15, because a concurrency control exception will be thrown
3. C. 16, because of the lack of concurrency control
4. D. undefined, because of the lack of concurrency control

Correct Answer: C

After going through a sizing exercise, you determine that your application will need 100 storage-enabled JVMs with 4 GB heaps. You have 10 physical machines with 16 cores and 32 GB of RAM.
Which performance-tuning best practice would be violated by deploying your application on these machines?

1. A. Heap sizes should not be larger than 512 MB.
2. B. OS socket buffers should be at least 2 MB.
3. C. Avoid OS memory swapping/paging by not exhausting physical RAM.
4. D. Do not exceed one JVM per core.

Correct Answer: B

What is the first step towards creating an appliance?

1. A. introspection of an installed system
2. B. introspection of a VM template
3. C. fileset capture
4. D. template creation

Correct Answer: D

Which configuration can be used for enabling Coherence as an L2 Cache?

1. A. @Entity@CacheInterceptor (CoherenceReadCustomizer.class)public class Employee implements Serializable
2. B. @Entity@Customizer(CoherenceReadCustomizer.class)public class Employee implements Serializable
3. C. @Entity@Customizer(CoherenceReadWriteCustomizer.class)public class Employee implements Serializable
4. D. @Entity@CacheInterceptor (CoherenceInterceptor.class)public class Employee implements Serializable

Correct Answer: D