Object Oriented Programming - I (3140705) MCQs

MCQs of List, Stacks, Queues and Priority Queues

Showing 21 to 30 out of 40 Questions
1 2 3 4
21.
Which of these methods is used to add elements in vector at specific location?
(a) add()
(b) set()
(c) AddElement()
(d) addElement()
Answer:

Option (d)

22.
What will be the output of the following Java code? 
    import java.util.*;
    class vector 
    {
        public static void main(String args[]) 
        {
            Vector obj = new Vector(4,2);
            obj.addElement(new Integer(3));
            obj.addElement(new Integer(2));
            obj.addElement(new Integer(5));
            System.out.println(obj.elementAt(1));
        }
    }
(a) 0
(b) 3
(c) 2
(d) 5
Answer:

Option (c)

23.
What will be the output of the following Java code? 
    import java.util.*;
    class vector 
    {
        public static void main(String args[]) 
        {
            Vector obj = new Vector(4,2);
            obj.addElement(new Integer(3));
            obj.addElement(new Integer(2));
            obj.addElement(new Integer(5));
            System.out.println(obj.capacity());
        }
    }
(a) 2
(b) 3
(c) 4
(d) 6
Answer:

Option (c)

24.
What will be the output of the following Java code? 
    import java.util.*;
    class vector 
    {
        public static void main(String args[]) 
        {
            Vector obj = new Vector(4,2);
            obj.addElement(new Integer(3));
            obj.addElement(new Integer(2));
            obj.addElement(new Integer(6));
            obj.insertElementAt(new Integer(8), 2);
            System.out.println(obj);
        }
    }
(a) [3, 2, 6]
(b) [3, 2, 8]
(c) [3, 2, 6, 8]
(d) [3, 2, 8, 6]
Answer:

Option (d)

25.
What will be the output of the following Java code? 
    import java.util.*;
    class vector 
    {
        public static void main(String args[]) 
        {
            Vector obj = new Vector(4,2);
            obj.addElement(new Integer(3));
            obj.addElement(new Integer(2));
            obj.addElement(new Integer(5));
            obj.removeAll(obj);
            System.out.println(obj.isEmpty());
        }
    }
(a) 0
(b) 1
(c) TRUE
(d) FALSE
Answer:

Option (c)

26.
What will be the output of the following Java code? 
    import java.util.*;
    class stack 
    {
        public static void main(String args[]) 
        {
            Stack obj = new Stack();
            obj.push(new Integer(3));
            obj.push(new Integer(2));
            obj.pop();
            obj.push(new Integer(5));
     	    System.out.println(obj);
        }
    }
(a) [3, 5]
(b) [3, 2]
(c) [3, 2, 5]
(d) [3, 5, 2]
Answer:

Option (a)

27.
Which of these interface declares core method that all collections will have?
(a) set
(b) EventListner
(c) Comparator
(d) Collection
Answer:

Option (d)

28.
Which of these interface handle sequences?
(a) Set
(b) List
(c) Comparator
(d) Collection
Answer:

Option (b)

29.
Which of these is a basic interface that all other interface inherits?
(a) Set
(b) Array
(c) List
(d) Collection
Answer:

Option (d)

30.
Which of these is static variable defined in Collections?
(a) EMPTY_SET
(b) EMPTY_LIST
(c) EMPTY_MAP
(d) All of the mentioned
Answer:

Option (d)

Showing 21 to 30 out of 40 Questions
1 2 3 4