Java problem-Whats the reason behind and what will be probable output

Question

1.)

long milli=24*60*60*1000;
long micro=24*60*60*1000*1000;
long result=micro/milli;

The result should be 1000 but it\'s not

Answer 1

You need to put an L in there for long-conversion

long micro=24*60*60*1000*1000L

Answer 2

This feels jeopardy, having to guess the question as well as the answer. ;)

I think the second question should read

int i=0;
for(a=0;a<=Integer.MAX_VALUE;a++)
    i++

This will go into an infinite loop because all possible values of a are <= MAX_VALUE.

You can re-write this loop as

int a=0;
do {
    i++
} while (a++ != Integer.MAX_VALUE);

i will be Integer.MIN_VALUE as it overflows.

Answer 3

2)

public class test {
    public static void main(String[] ar){
        int i=0;
        for(int a=0; a< Integer.MAX_VALUE;a++) {
            i++;
        }
        System.out.println(i);
    }
}

output:

2147483647