Consider the following lines of code:
   System.out.println(null + true); //1
   System.out.println(true + null); //2
   System.out.println(null + null); //3

Which of the following statements are correct?

Select 1 option

A. None of the 3 lines will compile.
B. All the 3 line will compile and print null true, true null and null null respectively.
C. Line 1 and 2 won't compile but line 3 will print null null.
D. Line 3 won't compile but line 1 and 2 will print null true and true null respectively. 
E. None of the above.

Consider the following lines of code:

boolean greenLight = true;
boolean pedestrian = false;
boolean rightTurn = true;
boolean otherLane = false;
You can go ahead only if  the following expression evaluates to 'true' :
(( (rightTurn && !pedestrian || otherLane) || ( ? && !pedestrian &&
greenLight ) )  == true )

What variables can you put in place of '?' so that you can go ahead?

Select 1 option

A. rightTurn
B. otherLane
C. Any variable would do.
D. None of the variable would allow to go.

Which line in the following code will cause the compilation to fail?

public class TestClass {
    
    public static void main(String[] args) throws Exception {
       work();                  //LINE 10
       int j = j1;               //LINE 11
       int j1 = (double) x; //LINE 12
    }
   
    public static void work() throws Exception{
        System.out.println(x); //LINE 15
    }
    static double x;    //19
}

Select 1 option

A. Line 10
B. Line 11
C. Line 12
D. Line 15
E. Line 19

Drag and Drop valid operators in boxes.
= operator can be used more than once.
=        +=        *=
public class TestClass
{
public static void main(String[] args)
{
Short k = 9;    
Integer I =9;    
Boolean b = false;
char c = ‘a’;    
String str = “123”;

Given:

byte b = 1;  
char c = 1;  
short s = 1; 
 int i = 1;

which of the following expressions are valid?

Select 3 options 

A. s = b * b ; 
B. i = b << b ; 
C. s <<= b ; 
D. c = c + b ; 
E. s += i ;