There are given some scenarios where unchecked exceptions can occur. They are as follows:
1) Scenario where ArithmeticException occurs
If we divide any number by zero, there occurs an ArithmeticException.
int a=50/0;//ArithmeticException
2) Scenario where NullPointerException occurs
If we have null value in any variable, performing any operation by the variable occurs an NullPointerException.
String s=null;
System.out.println(s.length());//NullPointerException
3) Scenario where NumberFormatException occurs
The wrong formatting of any value, may occur NumberFormatException. Suppose I have a string variable that have characters, converting this variable into digit will occur NumberFormatException.
String s="abc";
int i=Integer.parseInt(s);//NumberFormatException
4) Scenario where ArrayIndexOutOfBoundsException occurs
If you are inserting any value in the wrong index, it would result ArrayIndexOutOfBoundsException as shown below:
int a[]=new int[5];
a[10]=50; //ArrayIndexOutOfBoundsException
