What is the output of the following program? Give the exact format of the output

Question

What is the output of the following program? Give the exact format of the output. public class tests1 { public static void main (String [] args) { int d1 = 31: int d5 = %2: d1/= 2: int d4 = %2: d1/= 2: int d3 = %2: d1/= 2: int d2 = %2: d1/= 2: System.out.println ("Answer: " + d1 + d2 + d3 + d4 + d5): } } Convert the following function consisting of a casecaded if statement to a function consisting of a switch statement: private static char grade (int score) { if (score > 89 && score 79 && score 69 && score 59 && score 0 && score

Explanation / Answer

(1)

public class tests1
{
public static void main(String args[])
{
int d1=31;//d1 is 31
int d5=d1%2;//so 31%2 remmainder is 1 so d5 is 1
d1/=2;//or we can write d1=d1/2=31/2 that 15.5 but it's integer so d1 becomes 15 instead of 15.5
int d4=d1%2;//so d1%2=15%2 so remainder is 1 do d4 is 1
d1/=2;//again we can write d1=d1/2=15/2 that 7.5 but it's integer so d1 becomes 7 instead of 7.5
int d3=d1%2;//so 7%2 remmainder is 1 so d3 is 1
d1/=2;//or we can write d1=d1/2=7/2 that 3.5 but it's integer so d1 becomes 3 instead of 3.5

int d2=d1%2;//so d1%2=3%2 so remainder is 1 do d2 is 1
d1/=2;//again we can write d1=d1/2=3/2 that 1.5 but it's integer so d1 becomes 1 instead of 7.5
so all of the values are 1,1,1,1,1 so output is also 11111
System.out.println("Answer "+d1+d2+d3+d4+d5);
  
}
}

(2)

import java.io.*;
import java.util.*;
public class tests1
{
public static void main(String args[])
{
int score;
System.out.println("Enter Score ");
Scanner sc=new Scanner(System.in);
score=sc.nextInt();
System.out.println(grade(score));
}
public static char grade(int score)
{
int ch=score/10;
switch(ch)
{
case 10 :
case 9 : return 'A';
case 8 : return 'B';
case 7 : return 'C';
case 6 : return 'D';
case 5 :
case 4 :
case 3 :
case 2 :
case 1 :
case 0 :return 'F';
default : System.out.println("Not a Grade ");
System.exit(0);//it exits here
return 'N';//we need to return a character to remove syntax error
}
}
}

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