Question

Which of these exceptions will be thrown if we use null reference for an arithmetic operation?

(a) ArithmeticException

(b) NullPointerException

(c) IllegalAccessException

(d) IllegalOperationException

I had been asked this question by my school principal while I was bunking the class.

I'd like to ask this question from Java’s Built in Exceptions topic in chapter Exploring java.lang & java.io of Java

Answer 1

Right choice is (b) NullPointerException

For explanation: If we use null reference anywhere in the code where the value stored in that reference is used then NullPointerException occurs.