Computer Science Workshop Quiz

Which of the following is not a type of polymorphism in Java?

Which feature of OOPS described the reusability of code?

Which collection does not allow duplicate elements?

Which collection allows you to retrieve elements in the order they were inserted?

What is the Output of following Java Program? import java.util.*; class Demo { public static void main(String[] args) { ArrayList arr = new ArrayList(); arr.add(11); arr.add(2); arr.add(3); arr.add(5); arr.add(7); arr.remove(new Integer(7)); arr.remove(2); for (int i = 0; i < arr.size(); i++) System.out.print(arr.get(i) + " "); } }

Which of these is an correct way of defining generic method?

Which of the following collections is sorted by its natural ordering?

What is the Output of following Java Program? import java.util.*; class Demo { public static void main(String[] args) { LinkedHashMap hm = new LinkedHashMap(); hm.put("John", 3); hm.put("Ron", 1); hm.put("George", 2); hm.put("Ray", 4); for (Map.Entry e : hm.entrySet()) System.out.println( e.getKey() + " "+ e.getValue()); } }

The Comparable interface contains a method called________________.

What following code does? public final class Algorithm { public static void fun(T[] a, int i, int j) { T temp = a[i]; a[i] = a[j]; a[j] = temp; } }