Java Operators Test(1st)

What will be the output?

public class Test{
      public static void main(String args[]){
            int a = 42;
            double b = 42.25;
            System.out.print((a%10)+" "+(b%10));
      }
}

What will be the output?

public class Test{
      public static void main(String args[]){
            int a = 42;
            double b = 42.25;
            System.out.print((a%10)+" "+(b%10));
      }
}

1 Mark(s)

2 2.5
4.2 4.225
2 4.225
42 42.5
Compilation Error

Which of the following is the correct expression that evaluates to true if the number x is between 1 and 100 or the number is negative?

1 Mark(s)

((x < 100) && (x > 1)) && (x < 0)
((x < 100) && (x > 1)) || (x < 0)
(1 > x > 100) || (x < 0)
1 < x < 100 || x < 0

int ++a = 100 ; 
System.out.println( ++a ) ;

What will be the output of the above fraction of code ?

int ++a = 100 ; 
System.out.println( ++a ) ;

What will be the output of the above fraction of code ?

1 Mark(s)

None of these
100
Compiler displays error as ++a is not a valid identifier
Displays error as ++a is not enclosed in double quotes in println statement

What will be the output after compiling and running following code?

1. public class Test{
2.       public static void main(String... args){
3.             int x =5;
4.             x *= 3 + 7;
5.             System.out.println(x);
6.       }
7. }

What will be the output after compiling and running following code?

1. public class Test{
2.       public static void main(String... args){
3.             int x =5;
4.             x *= 3 + 7;
5.             System.out.println(x);
6.       }
7. }

1 Mark(s)

None of these
22
Compilation fails with an error at line 4
50
10

What will be the output for the below code ?

class A{
      public void printValue(){
            System.out.println("A");
      }
}
class B extends A{
      public void printValue(){
            System.out.println("B");
      }
}

1. public class Test{
2.       public static void main(String... args){
3.             A b = new B();
4.             newValue(b);
5.       }
6.       public static void newValue(A a){
7.             if(a instanceof B){
8.                   ((B)a).printValue();
9.             }
10.      }
11. }

What will be the output for the below code ?

class A{
      public void printValue(){
            System.out.println("A");
      }
}
class B extends A{
      public void printValue(){
            System.out.println("B");
      }
}

1. public class Test{
2.       public static void main(String... args){
3.             A b = new B();
4.             newValue(b);
5.       }
6.       public static void newValue(A a){
7.             if(a instanceof B){
8.                   ((B)a).printValue();
9.             }
10.      }
11. }

1 Mark(s)

B
Compilation fails with an error at line 4
None of these
A
Compilation fails with an error at line 8

What will be the output?

if(1 + 1 + 1 + 1 + 1 == 5){
        System.out.print("TRUE");
}
else{
        System.out.print("FLASE");
}

What will be the output?

if(1 + 1 + 1 + 1 + 1 == 5){
        System.out.print("TRUE");
}
else{
        System.out.print("FLASE");
}

1 Mark(s)

TRUE
None of these
Compiler Error
FALSE

Determine output:

public class Test{
      public static void main(String... args){
            int a=5 , b=6, c=7;
            System.out.println("Value is "+ b + c);
            System.out.println(a + b + c);
            System.out.println("String " + (b+c));
      }
}

Determine output:

public class Test{
      public static void main(String... args){
            int a=5 , b=6, c=7;
            System.out.println("Value is "+ b + c);
            System.out.println(a + b + c);
            System.out.println("String " + (b+c));
      }
}

1 Mark(s)

Value is 13 18 String 13
Compilation fails
Value is 67 18 String 13
None of these
Value is 13 18 String

What is the output of the following program ?

class Numbers{
        public static void main(String args[]){
                int a=20, b=10;
                if((a < b) && (b++ < 25)){
                        System.out.println("This is any language logic");
                }
                System.out.println(b); 
        }
}

What is the output of the following program ?

class Numbers{
        public static void main(String args[]){
                int a=20, b=10;
                if((a < b) && (b++ < 25)){
                        System.out.println("This is any language logic");
                }
                System.out.println(b); 
        }
}

1 Mark(s)

11
10
12
Compilation Error

Select from among the following character escape code which is not available in Java.

1 Mark(s)

Determine output:

public class Test{
      static int i = 5;
      public static void main(String... args){
            System.out.println(i++);
            System.out.println(i);
            System.out.println(++i);
            System.out.println(++i+i++);
      }
}

Determine output:

public class Test{
      static int i = 5;
      public static void main(String... args){
            System.out.println(i++);
            System.out.println(i);
            System.out.println(++i);
            System.out.println(++i+i++);
      }
}

1 Mark(s)

6 7 6 16
5 6 7 16
None of these
5 6 6 16
6 6 6 16

public class Test{

      public static void main(String args[]){

            System.out.print(""=="");

            System.out.print(" ");

            System.out.print("A"=="A");

            System.out.print(" ");

            System.out.print("a==A");

      }

}

public class Test{

      public static void main(String args[]){

            System.out.print(""=="");

            System.out.print(" ");

            System.out.print("A"=="A");

            System.out.print(" ");

            System.out.print("a==A");

      }

}

1 Mark(s)

true true a==A
true true false
'==' A '=='A a==A
Compilation Fails
None of the above

int x = 0, y = 0 , z = 0 ;
x = (++x + y-- ) * z++;

What will be the value of "x" after execution ?

int x = 0, y = 0 , z = 0 ;
x = (++x + y-- ) * z++;

What will be the value of "x" after execution ?

1 Mark(s)

1
-1
-2
0
2

Java Operators Test(1st) : Question 1 of 12