Oracle 1z0-895 Exam Practice Questions (P. 4)

Given singleton bean FooEJB:

How many distinct FooEJB bean instances will be used to process the code on the lines 101-105?

A developer writes a Singleton bean that holds state for a single coordinate:

An update thread acquires an EJB reference to CoordinateBean and alternates between invoking SetCoordinate (0, 0) and SetCoordinate (1, 1) in a loop.
At the same time, ten reader threads each acquire an EJB reference to CoordinateBean and invoke getCoordinate () in a loop.
Which represents the set of all possible coordinate values [X, Y] returned to the reader threads?

Assume a client will be accessing a Singleton bean.
Which client views is a Singleton bean capable of exposing? (Choose two)

A developer writes a Singleton bean that uses the java Persistence API within a business method:

Two different concurrently executing caller threads acquire an EJB reference to PersonBean and each invoke the getPerson () method one time. How many distinct transaction are used to process the caller invocations?

Given the following client-side code that makes use of the session bean Foo:
10. @EJB Foo bean1;
12. @EJB Foo bean2;
// more code here
20. boolean test1 = beanl.equals(bean1);
21. boolean test2 = beanl.equals(bean2) ;
Which three statements are true? (Choose three)