/* Missing statements ? */
public class NewTreeSet extends java.util.TreeSet
{
public static void main(String [] args)
{
java.util.TreeSet t = new java.util.TreeSet();
t.clear();
}
public void clear()
{
TreeMap m = new TreeMap();
m.clear();
}
}
Which of the following statements when added at beginning of the program will allow the code to compile successfully?
1. No statement is required
2. import java.util.*;
3. import java.util.Tree;
4. import java.util.TreeSet;
5. import java.util.TreeMap;
What will be the output of this java program?
public class Test
{
public int aMethod()
{
static int i = 0;
i++;
return i;
}
public static void main(String args[])
{
Test test = new Test();
test.aMethod();
int j = test.aMethod();
System.out.println(j);
}
}
What will be the output of this java program?
interface Count
{
short counter = 0;
void countUp();
}
public class TestCount implements Count
{
public static void main(String [] args)
{
TestCount t = new TestCount();
t.countUp();
}
public void countUp()
{
for (int x = 6; x>counter; x--, ++counter) /* Line 14 */
{
System.out.print(" " + counter);
}
}
}
Which of the following is not an OOPs concept?
Which of the following is a type of polymorphism in Java?
When is method overloading determined in java?
In which of the following cases, method overloading does not happen in java?
Which concept of OOPs is achieved by combining methods and attributes into a class?
What will be the output of this java program?
class PassA
{
public static void main(String [] args)
{
PassA p = new PassA();
p.start();
}
void start()
{
long [] a1 = {3,4,5};
long [] a2 = fix(a1);
System.out.print(a1[0] + a1[1] + a1[2] + " ");
System.out.println(a2[0] + a2[1] + a2[2]);
}
long [] fix(long [] a3)
{
a3[1] = 7;
return a3;
}
}
What will be the output of this java program?
class A
{
void A() /* Line 3 */
{
System.out.println("Class A");
}
public static void main(String[] args)
{
new A();
}
}
What will be the output of this java program?
class Base
{
Base()
{
System.out.print("Base");
}
}
public class Alpha extends Base
{
public static void main(String[] args)
{
new Alpha(); /* Line 12 */
new Base(); /* Line 13 */
}
}
What will be the output of the below java program?
class box
{
int width;
int height;
int length;
}
class mainclass
{
public static void main(String args[ ])
{
box obj1 = new box();
box obj2 = new box();
obj1.height = 1;
obj1.length = 2;
obj1.width = 1;
obj2 = obj1;
System.out.println(obj2.height);
}
}
What will be the output of the below java program?
class access
{
public int x;
static int y;
void cal(int a, int b)
{
x += a ;
y += b;
}
}
class static_specifier
{
public static void main(String args[ ])
{
access obj1 = new access();
access obj2 = new access();
obj1.x = 0;
obj1.y = 0;
obj1.cal(1, 2);
obj2.x = 0;
obj2.cal(2, 3);
System.out.println(obj1.x + " " + obj2.y);
}
}
What will be the output of this java program?
class access
{
static int x;
void increment()
{
x++;
}
}
class static_use
{
public static void main(String args[])
{
access obj1 = new access();
access obj2 = new access();
obj1.x = 0;
obj1.increment();
obj2.increment();
System.out.println(obj1.x + " " + obj2.x);
}
}
At line number 2 below, choose 3 valid attributes/qualifiers among “final, static, native, public, private, abstract, protected”
public interface Status
{
/* insert qualifier here */ int MY_VALUE = 10;
}
What will be the output of this java program?
class Alligator
{
public static void main(String[] args)
{
int []x[] = {{1,2}, {3,4,5}, {6,7,8,9}};
int [][]y = x;
System.out.println(y[2][1]);
}
}
What will be the output of this java program?
abstract class A
{
int i;
abstract void display();
}
class B extends A
{
int j;
void display()
{
System.out.println(j);
}
}
class Abstract_demo
{
public static void main(String args[])
{
B obj = new B();
obj.j=2;
obj.display();
}
}
What will be the output of this java program?
class A
{
public int i;
private int j;
}
class B extends A
{
void display()
{
super.j = super.i + 1;
System.out.println(super.i + " " + super.j);
}
}
class inheritance
{
public static void main(String args[])
{
B obj = new B();
obj.i=1;
obj.j=2;
obj.display();
}
}
What will be the output of this java program?
class A
{
public int i;
protected int j;
}
class B extends A
{
int j;
void display()
{
super.j = 3;
System.out.println(i + " " + j);
}
}
class Output
{
public static void main(String args[])
{
B obj = new B();
obj.i=1;
obj.j=2;
obj.display();
}
}
What will be the output of the following java code?
class Boxer1
{
Integer i;
int x;
public Boxer1(int y)
{
x = i+y;
System.out.println(x);
}
public static void main(String[] args)
{
new Boxer1 (new Integer(4));
}
}
