Answered: What exception does this fragment of…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

What exception does this fragment of code raise?

class Exception_Demo{

public static void main(String [] args) {

try {

int a = 10, b = 0;

int c = a/b;

System.out.println ("Result" + c);

}

a) NumberFormat

b) NullPointer

c) ArrayIndexOutOfBounds

d) Arithmetic

Expert Solution

Step 1

Note: The above code will not run, you need to add catch or Finally block if you want this code to run.

Lets first see what each exception means:

NumberFormat exception occurs when a programmer tries to convert a string into an integer. For example, String s="Alex"; int i=Integer.parseInt(s); This will cause NumberFormat exception.
NullPointer exception occurs when the program attempts to use an object reference that has a null value. For example, String ptr=null; if(ptr.equals("Hello")) {System.out.println("Matches") ;} This will cause NullPointer exception.
ArrayIndexOutOfBounds exception occurs when a programmer tries to access an element beyond the capacity of the index of an array. int arr[]={1,2,3}; Sysout.out.println(arr[8]);This will cause ArrayIndexOutOfBond exception.
An arithmetic exception occurs when the exceptional arithmetic condition comes. Like here we tried to divide a number by 0.

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