Operators and Assignments

1

Which two are equal?

  1. 32/4
  2. (8 >> 2) << 4
  3. 2^5
  4. 128 >>> 2
  5. 2 >> 5

A. 1 and 2
B. 2 and 4
C. 1 and 3
D. 2 and 3

2
import java.awt.Button;
class CompareReference 
{
    public static void main(String [] args) 
    {
        float f = 42.0f;
        float [] f1 = new float[2];
        float [] f2 = new float[2];
        float [] f3 = f1;
        long x = 42;
        f1[0] = 42.0f;
    }
}

which three statements are true?

1. f1 == f2

2. f1 == f3

3. f2 == f1[1]

4. x == f1[0]

f == f1[0]

A. 1, 2 and 3
B. 2, 4 and 5
C. 3, 4 and 5
D. 1, 4 and 5

3

Which two statements are equivalent?

  1. 3/2
  2. 3<2
  3. 3*4
  4. 3<<2

A. 1 and 2
B. 2 and 3
C. 3 and 4
D. 1 and 4

4

Which two statements are equivalent?

  1. 16*4
  2. 16>>2
  3. 16/2^2
  4. 16>>>2

A. 1 and 2
B. 2 and 4
C. 3 and 4
D. 1 and 3

5

Which of the following are legal lines of code?

  1. int w = (int)888.8;
  2. byte x = (byte)1000L;
  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.