Oracle 1z0-816 Exam Questions

Question 6 of 80

Given these two classes:
Exam 1z0-816: Question 6 - Image 1

And given this fragment:
Exam 1z0-816: Question 6 - Image 3

Which describes the fragment?

It throws IllegalMonitorStateException.

It is subject to deadlock.

It is subject to livelock.

The code does not compile.

Correct Answer: D

Question 7 of 80

Given:

Examine these requirements:
Eliminate code duplication.
Keep constant the number of methods other classes may implement from this interface.
Which method can be added to meet these requirements?

Correct Answer: B

Question 8 of 80

Given:

Which one is correct?

An IllegalThreadStateException is thrown at run time.

Three threads are created.

The compilation fails.

Four threads are created.

Correct Answer: A

An IllegalThreadStateException is thrown at runtime. In the given code, `t1.start();` is called twice. According to the Java documentation, starting a thread that has already been started is not allowed and will result in an IllegalThreadStateException.

Question 9 of 80

Which code fragment does a service use to load the service provider with a Print interface?

private Print print = com.service.Provider.getInstance();

private java.util.ServiceLoader<Print> loader = ServiceLoader.load(Print.class);

private java.util.ServiceLoader<Print> loader = new java.util.ServiceLoader<>();

private Print print = new com.service.Provider.PrintImpl();

Correct Answer: B

Question 10 of 80

Examine these module declarations:
Exam 1z0-816: Question 10 - Image 1

Which two statements are correct? (Choose two.)

The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.

The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.

The Consumer module should require the ServiceProvider module.

The ServiceProvider module should export the com.myimpl package.

The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.

Correct Answer: B, E

The placement of the com.example.api API in a separate module, ServiceAPI, indeed makes it easier to install multiple provider modules. By having the API in its own module, different modules can implement the API without modifying the API module itself, thus allowing for flexibility and easy swapping of implementations. The ServiceProvider module, on the other hand, does not need to know the identity of any modules that use the com.example.api API. This separation of concerns adheres to the principle of module decoupling, where the provider does not need to be aware of the consumers of the service.