The AMB hotel gives the amount to be paid by the customer as an integer, which of the following Math method rounds off the bill in decimals to an integer?

1. Math.round()
2. Math.pow()
3. Math.ceil()
4. Math.abs()

The output of the following code is:

System.out.println(Math.ceil(6.4) + Math.floor(-1-2));

1. 3.0
2. 4
3. 3
4. 4.0

Which of the following mathematical methods returns only an integer?

1. Math.ceil(n)
2. Math.sqrt(n)
3. Math.floor(n)
4. Math.round(n)