SCJP Exception Handling and Java I/O

Question 1

Which of the following is a checked exception in Java?

Accepted Answer

IOException

Answer

NullPointerException

Answer

ArrayIndexOutOfBoundsException

Answer

ClassCastException

Question 2

What is the purpose of the `finally` block in Java exception handling?

Accepted Answer

It always executes after try/catch, regardless of outcome

Answer

It executes only when an exception is thrown

Answer

It executes only when no exception is thrown

Answer

It replaces the catch block

Question 3

Which keyword is used to manually throw an exception in Java?

Accepted Answer

throw

Answer

throws

Answer

raise

Answer

exception

Question 4

What happens if an exception is thrown inside a `finally` block?

Accepted Answer

It replaces any exception from the try/catch block

Answer

It is silently ignored

Answer

The program crashes immediately

Answer

A second finally block handles it

Question 5

Which class is the parent of all errors and exceptions in Java?

Accepted Answer

Throwable

Answer

Exception

Answer

Error

Answer

RuntimeException

Question 6

In Java I/O, which class is used for reading characters from a file efficiently with buffering?

Accepted Answer

BufferedReader

Answer

FileInputStream

Answer

FileReader

Answer

DataInputStream