Quiz  /  BlueJ Class 9 MCQ Questions With Answers

  • 1. 
    Cell numbers of a dimensional array are also known as:

  • packets
  • blocks
  • subscripts
  • superscript

  • 2. 
    Which is not a possible result of n%6

  • 0
  • 1
  • 5
  • 6

  • 3. 
    Which element is represented by a[10]?

  • 10th
  • 9th
  • 11th
  • None

  • 4. 
    What would this output?System.out.println(15%3);

  • An error
  • 5
  • 3
  • 0

  • 5. 
    What is the type of this method's parameter?

  • setCredits
  • void
  • int
  • creditValue
  • credits

  • 6. 
    An object diagram changes when the program is running.

  • True
  • False

  • 7. 
    Which of the following is a valid print statement?

  • System.out.println("Hello");
  • System.out.printLn("Hello");
  • system.out.println("Hello");
  • println("Hello");

  • 8. 
    An object diagram changes when you modify the source code.

  • True
  • False

  • 9. 
    Select the correct output of following java code

  • 4 6
  • 2 4
  • 8
  • 10

  • 10. 
    What would this output?

  • 5bike134
  • 12bike134
  • 5bike17
  • 12bike17

  • 11. 
    When a class has more than one method with the same name.

  • Abstraction
  • Modularization
  • Overloading
  • Diagraming

  • 12. 
    The ability to ignore details of parts, to focus attention on a higher level of a problem.

  • Abstraction
  • Modularization
  • Overloading
  • Diagraming

  • 13. 
    What is the logical operator for "or" ?

  • ||
  • &
  • &&
  • !
  • |

  • 14. 
    Int a[] ={2,4,6,8,10};a[0]=23;a[3]=a[1];int c= a[0]+a[1];System.out.println("Sum = "+c);

  • 6
  • 25
  • 24
  • 27

  • 15. 
    ! (4 < 5)

  • True
  • False

  • 16. 
    Int a[]=new int [5]; a[0]=4; a[1]=8; a[2]=7; a[3]=12; a[4]=3; System.out.println(a[2+1]);

  • 78
  • 15
  • 12
  • 19

  • 17. 
    Char m[] = {'R', 'A', 'J', 'E', 'N', 'D', 'R', 'A' };?

  • m.size of (a)
  • m.elements of (m)
  • m.length
  • m.length()

  • 18. 
    (34 != 33) && ! false

  • True
  • False

  • 19. 
    When a variable stores an object, the object is stored in the variable directly.

  • True
  • False

  • 20. 
    What is the type of this method?

  • setCredits
  • void
  • int
  • creditValue
  • credits

  • 21. 
    This changes the state of an object.

  • method
  • mutator
  • accessor
  • conditional
  • parameter

  • 22. 
    What is the name of this method?

  • setCredits
  • void
  • int
  • creditValue
  • credits

  • 23. 
    Which of the following is a valid declaration of a field?

  • public int age;
  • private int age;
  • private int Age;
  • public int Age

  • 24. 
    An array element can be accessed through:

  • dots
  • element number
  • index number
  • none

  • 25. 
    This return information about the state of an object.

  • method
  • mutator
  • accessor
  • conditional
  • parameter
Report Question
warning
access_time
  Time