Write True or False for each of the following statements. (Corecct if fales)

Question

1 If a method does not return a value, the return value type must be static.

2 The expression !(true || true && false || !true) is evaluated to true.

3 Every array has a length that specifies the number of elements in the array.

4 It is possible for the body of a do-while statement to never be executed.

5 The statement import java.*.*; is valid if placed at the very top of a Java source file.

6 The expression s.indexOf(",") returns the position of a comma in s, a String object.

7 The following statement System.out.print("Hi".compareTo("Hi") == 0); is correct.

8 The switch selection structure must end with the default case.

9 Variables declared in the body of a particular method are known as local variables.

10 int array = new int[10]; creates an integer array of size

Answer 1

/***********************************************************************

#1) FALSE

method does not return a value, the return type is void

#2) INCORRECT !!!

AND has priority over OR

so the middle gets evaluated first

!( true || true && false || !true )

=!( true || false || !true)

=!(true)

=false

#3) True.. you must declare the size of the array

#4) FALSE... do while statement executes at least once

#5) FALSE... that syntax is not correct...

#6) TRUE

#7) It is syntactically correct; the string compare returns

true which gets output

#8) FALSE. the default case can appear anywhere in the switch

#9) Yes, they are local vars

#10) The syntax is incorrect

**********************************************************************/

//import java.*.*;

class Junk

{

public static void main(String args[])

{

boolean x = !(true || true && false || !true) ;

System.out.println(x);

String str = new String(" Dogs, cats and pigeons ");

int iIndex = str.indexOf(",");

System.out.println(iIndex);

System.out.print("Hi".compareTo("Hi") == 0);

int X=5;

switch (X)

{

default: { break; }

case 0: { System.out.println("nothing"); break; }

case 1:

case 2:

{

System.out.println(" something ");

break;

}

} //switch

int array[] = new int[10];

}

}