java-collections(part-I)-vlits

Which of these packages contain all the collection classes?

• java.lang

• java.util

• java.net

• java.awt

Which of these classes is not part of Java’s collection framework?

• Maps

• Array

• Stack

• Queue

Which of this interface is not a part of Java’s collection framework?

• List

• Set

• SortedMap

• SortedList

Which of these methods deletes all the elements from invoking collection?

• clear()

• reset()

• delete()

• refresh()

What is Collection in Java?

• A group of objects

• A group of classes

• A group of interfaces

• None of the mentioned

What is the output of this program?

import java.util.*;

class Array

{

public static void main(String args[]){

int array[] = new int [5];

for (int i = 5; i > 0; i--)

array[5-i] = i;

Arrays.fill(array, 1, 4, 8);

for (int i = 0; i < 5 ; i++)

System.out.print(array[i]);

}

}

• 12885

• 12845

• 58881

• 54881

What is the output of this program?

import java.util.*;

class Bitset

{

public static void main(String args[]){

BitSet obj = new BitSet(5);

for (int i = 0; i < 5; ++i)

obj.set(i);

obj.clear(2);

System.out.print(obj);

}

}

• {0, 1, 3, 4}

• {0, 1, 2, 4}

• {0, 1, 2, 3, 4}

• {0, 0, 0, 3, 4}

Which of these is static variable defined in Collections?

• EMPTY_SET

• EMPTY_LIST

• EMPTY_MAP

• All of the mentioned

Which of these is an incorrect form of using method max() to obtain maximum element?

• max(Collection c)

• max(Collection c, Comparator comp)

• max(Comparator comp)

• max(List c)

Which of these methods sets every element of a List to a specified object?

• set()

• fill()

• Complete()

• add()