ch 4 methods

Question 1

what is the method

Answer 1

is a collection of a statments that are grouped together to perform an operation

Question 2

what is the meaning of the public

Answer 2

pubic identifies that this method can be used by any classes

Question 3

what is the meaning of static

Answer 3

identifies that this method is a class method

Question 4

what the meaning of void

Answer 4

the method does not return any value

Question 5

public static void main(String[] args) {
double a;double b;
System.out.println( a=0/0.0);
what is the ouput

Answer 5

NaN

Question 6

. What will be the error in the following Java code?

byte b = 50;
b = b * 50; a) b cannot contain value 50 b) b cannot contain value 100, limited by its range c) No error in this code d) * operator has converted b * 50 into int, which can not be converted to byte without casting

Answer 6

d

Question 7

4. If an expression contains double, int, float, long, then the whole expression will be promoted into which of these data types?
   a) long
   b) int
   c) double
   d) float

Answer 7

c

If any operand is double the result of an expression is double.

Question 8

what are legal

1. int w = (int)888.8;
2. byte x = (byte)100L;
3. long y = (byte)100;
4. byte z = (byte)100L;
   a) 1 and 2
   b) 2 and 3
   c) 3 and 4
   d) All statements are correct

Answer 8

d