81. Which of these class is used for creating a client for a server-client operations?
82. What will be the output of the following Java 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.sort(array);
for (int i = 0; i < 5; ++i)
System.out.print(array[i]);;
}
}
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.sort(array);
for (int i = 0; i < 5; ++i)
System.out.print(array[i]);;
}
}
83. What is the unique feature of LinkedHashSet?
84. What will be the output of the following Java program?
import java.util.*;
class Arraylist
{
public static void main(String args[])
{
ArrayList obj1 = new ArrayList();
ArrayList obj2 = new ArrayList();
obj1.add("A");
obj1.add("B");
obj2.add("A");
obj2.add(1, "B");
System.out.println(obj1.equals(obj2));
}
}
import java.util.*;
class Arraylist
{
public static void main(String args[])
{
ArrayList obj1 = new ArrayList();
ArrayList obj2 = new ArrayList();
obj1.add("A");
obj1.add("B");
obj2.add("A");
obj2.add(1, "B");
System.out.println(obj1.equals(obj2));
}
}
85. What will be the output of the following Java program?
import java.util.*;
class Maps
{
public static void main(String args[])
{
HashMap obj = new HashMap();
obj.put("A", new Integer(1));
obj.put("B", new Integer(2));
obj.put("C", new Integer(3));
System.out.println(obj);
}
}
import java.util.*;
class Maps
{
public static void main(String args[])
{
HashMap obj = new HashMap();
obj.put("A", new Integer(1));
obj.put("B", new Integer(2));
obj.put("C", new Integer(3));
System.out.println(obj);
}
}
86. Which of these class object uses the key to store value?
87. Which of these class object can be used to form a dynamic array?
88. What will be the output of the following Java program?
import java.util.*;
class Collection_Algos
{
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);
while(i.hasNext())
System.out.print(i.next() + " ");
}
}
import java.util.*;
class Collection_Algos
{
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);
while(i.hasNext())
System.out.print(i.next() + " ");
}
}
89. 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));
}
}
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));
}
}
90. 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);
}
}
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);
}
}
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