OCP Exception Handling and Assertions 3

Question 1

When using try-with-resources, in what order are resources closed?

Accepted Answer

In reverse order of how they were opened

Answer

Resources in a try-with-resources statement are closed in the reverse order of their declaration.

Question 2

What interface must a class implement to be used in a try-with-resources statement?

Accepted Answer

Either Closeable or AutoCloseable

Answer

A class can be used in try-with-resources if it implements either AutoCloseable or its subinterface Closeable.

Question 3

What are 'suppressed exceptions' in Java?

Accepted Answer

Exceptions thrown during resource closing that are added to the primary exception

Answer

When a resource's close() throws an exception while another exception is propagating, the close() exception is suppressed and attached to the primary exception.

Question 4

Which statement about `assert` with a detail message is correct?

Accepted Answer

assert condition, message; — message only evaluated if assertion fails

Answer

In `assert condition : message;`, the message expression is only evaluated when the assertion fails, making it lazy.

Question 5

What happens if both a catch block and a finally block throw exceptions?

Accepted Answer

The finally block's exception replaces the catch exception

Answer

If the finally block throws an exception, it replaces any exception that was being propagated from the catch block.

(OCP) Oracle Certified Professional Practice Test

(OCP) Oracle Certified Professional Practice Test

OCP Exception Handling and Assertions 3