OCP Exception Handling and Assertions 2

Question 1

What happens when an exception is thrown inside a try block and no matching catch block exists in the current method?

Accepted Answer

The exception propagates up the call stack

Answer

When no matching catch block is found, the exception propagates to the calling method's exception handler.

Question 2

Which of the following is true about the `finally` block in Java?

Accepted Answer

It executes even if a return statement is in the try block

Answer

The finally block always executes after try/catch completion, even if a return statement is encountered in the try block.

Question 3

What is the output of: `try { throw new RuntimeException(); } catch (Exception e) { System.out.print("A"); } finally { System.out.print("B"); }`?

Accepted Answer

AB

Answer

The catch block prints 'A', then the finally block always executes and prints 'B', resulting in 'AB'.

Question 4

Which exception class must be the parent when creating a custom checked exception?

Accepted Answer

Exception (but not RuntimeException)

Answer

A custom checked exception must extend Exception or one of its subclasses that is not RuntimeException or Error.

Question 5

What does the `assert` statement do when assertions are disabled?

Accepted Answer

Is completely skipped by the JVM

Answer

When assertions are disabled (the default), the JVM completely skips the assert statement without evaluating its expression.

(OCP) Oracle Certified Professional Practice Test