71. What will be the output of the following Java program?
import java.util.*;
class Collection_iterators
{
public static void main(String args[])
{
LinkedList list = new LinkedList();
list.add(new Integer(2));
list.add(new Integer(8));
list.add(new Integer(5));
list.add(new Integer(1));
Iterator i = list.iterator();
Collections.reverse(list);
Collections.shuffle(list);
i.next();
i.remove();
while(i.hasNext())
System.out.print(i.next() + " ");
}
}
import java.util.*;
class Collection_iterators
{
public static void main(String args[])
{
LinkedList list = new LinkedList();
list.add(new Integer(2));
list.add(new Integer(8));
list.add(new Integer(5));
list.add(new Integer(1));
Iterator i = list.iterator();
Collections.reverse(list);
Collections.shuffle(list);
i.next();
i.remove();
while(i.hasNext())
System.out.print(i.next() + " ");
}
}72. PriorityQueue is thread safe.
73. Which of these method is used to make a bit zero specified by the index?
74. Which of these is a method of class Date which is used to search whether object contains a date before the specified date?
75. Which of these is a class which uses String as a key to store the value in object?
76. When two threads access the same ArrayList object what is the outcome of the program?
77. What will be the output of the following Java program?
import java.util.*;
class Output
{
public static void main(String args[])
{
ArrayList obj = new ArrayList();
obj.add("A");
obj.add(0, "B");
System.out.println(obj.size());
}
}
import java.util.*;
class Output
{
public static void main(String args[])
{
ArrayList obj = new ArrayList();
obj.add("A");
obj.add(0, "B");
System.out.println(obj.size());
}
}78. Which data structure is used in Breadth First Traversal of a graph?
79. Which of these classes is not part of Java's collection framework?
Read More Section(Collections Framework in java)
Each Section contains maximum 100 MCQs question on Collections Framework in java. To get more questions visit other sections.