SCJP Exception Handling and Java I/O 4

Question 1

What happens when a finally block contains a return statement and the try block also contains a return statement?

Accepted Answer

The finally block's return value overrides the try block's return value

Answer

The finally block's return statement overrides any return statement in the try or catch blocks.

Question 2

Which class provides methods to read primitive Java data types from an underlying input stream in a machine-independent way?

Accepted Answer

DataInputStream

Answer

DataInputStream implements DataInput and allows reading primitive types like readInt(), readDouble() in a portable way.

Question 3

What is the output of the following code?
try {
  throw new RuntimeException();
} catch (Exception e) {
  System.out.print("caught");
  throw e;
} finally {
  System.out.print("finally");
}

Accepted Answer

caughtfinally then re-throws

Answer

Both 'caught' and 'finally' are printed before the exception propagates to the caller.

Question 4

Which of the following is true about the FileWriter class?

Accepted Answer

FileWriter extends OutputStreamWriter

Answer

FileWriter extends OutputStreamWriter, which is a bridge from character streams to byte streams.

Question 5

Which exception is thrown when you try to access an element beyond the bounds of an array?

Accepted Answer

ArrayIndexOutOfBoundsException

Answer

ArrayIndexOutOfBoundsException is specifically thrown when an array index is out of range.

SCJP - Sun Certified Java Programmer Practice Test

SCJP - Sun Certified Java Programmer Practice Test

SCJP Exception Handling and Java I/O 4