Java Programming - Operators and Assignments

@ : Home > Java Programming > Operators and Assignments > Pointing out the correct statements

Exercise

Finding the output
Pointing out the correct statements

"Act well your part; there all honor lies."

- Alexander Pope

    
import java.awt.*;
class Ticker extends Component 
{
    public static void main (String [] args) 
    {
        Ticker t = new Ticker();
        /* Missing Statements ? */
    }
}

which two of the following statements, inserted independently, could legally be inserted into missing section of this code?

boolean test = (Component instanceof t);
boolean test = (t instanceof Ticker);
boolean test = t.instanceof(Ticker);
boolean test = (t instanceof Component);

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

Which of the following are legal lines of code?

int w = (int)888.8;
byte x = (byte)1000L;
long y = (byte)100;
byte z = (byte)100L;

A.	1 and 2
B.	2 and 3
C.	3 and 4
D.	All statements are correct.

Which two statements are equivalent?

16*4
16>>2
16/2^2
16>>>2

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

Which two statements are equivalent?

3/2
3<2
3*4
3<<2

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

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?

f1 == f2
f1 == f3
f2 == f1[1]
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