how cone the answer is 5 ? it is greater than for so the while condition is not satisfied hence the ans will be the input itself i.e. 2

Answer 1

int a = 2;
do {
a+=3;
} while (a < 4);
Console.Write(a);

The while condition not being satisfied means that we exit the loop after only 1 turn (which is the minimum for a do while loop).

Answer 2

the program gonna do the "do" statement cause he's before the while...
if the while wasn't satisfied the "do" would work again and again