JAVA Exam Set-2

Which of these is a superclass of all exceptional type classes?

What exception thrown by parseInt() method?

What is the output of this program?

package pkg;

class output {

public static void main(String args[])

{

StringBuffer s1 = new StringBuffer(“Hello”);

s1.setCharAt(1, x);

System.out.println(s1);

}

}

What will be the output of the following Java code?

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();
}
}

Which of these is correct about passing an argument by call-by-value process?

Which of the below is not a memory leak solution?

Which of these class allows us to get real time data about private and protected

member of a class?

What should not be done to avoid deadlock?

What will be the output of the following Java program?

class A
{
int i;
void display()
{
System.out.println(i);
}

}
class B extends A
{
int j;
void display()
{
System.out.println(j);
}
}
class inheritance_demo
{
public static void main(String args[])
{
B obj = new B();
obj.i=1;
obj.j=2;
obj.display();
}
}

Which of the following matches end of the string using regular expression in java?

Predict the output of the following program.

What will be the output of the following Java code?

class multidimention_array

{

public static void main(String args[])

{

int arr[][] = new int[3][];

arr[0] = new int[1];

arr[1] = new int[2];

arr[2] = new int[3];

int sum = 0;

for (int i = 0; i < 3; ++i)

for (int j = 0; j < i + 1; ++j)

arr[i][j] = j + 1;

for (int i = 0; i < 3; ++i)

for (int j = 0; j < i + 1; ++j)

sum + = arr[i][j];

System.out.print(sum);

}

}

What will be the output of the following program? 

enum Enums

{

A, B, C;

{

System.out.println(1);

}

static

{

System.out.println(2);

}

private Enums()

{

System.out.println(3);

}

}

public class MainClass

{

public static void main(String[] args)

{

Enum en = Enums.C;

}

}

What package is a part of the wrapper class which is imported by default into all Java programs?

class Boo

{

Boo(String s) { }

Boo() { }

}

class Bar extends Boo

{

Bar() { }

Bar(String s) {super(s);}

void zoo()

{

// insert code here

}

}

which one create an anonymous inner class from within class Bar?

Which constructs an anonymous inner class instance?

public class MyOuter

{

public static class MyInner

{

public static void foo() { }

}

}

which statement, if placed in a class other than MyOuter or MyInner, instantiates an instance of the nested class?

What will be the output of the program?

public abstract class AbstractTest

{

public int getNum()

{

return 45;

}

public abstract class Bar

{

public int getNum()

{

return 38;

}

}

public static void main (String [] args)

{

AbstractTest t = new AbstractTest()

{

public int getNum()

{

return 22;

}

};

AbstractTest.Bar f = t.new Bar()

{

public int getNum()

{

return 57;

}

};

System.out.println(f.getNum() + ” ” + t.getNum());

}

}

What will be the output of the following Java program?

class Output

{

public static void main(String args[])

{

Integer i = new Integer(257);

byte x = i.byteValue();

System.out.print(x);

}

}

What will be the output of the following Java code?

class array_output

{

public static void main(String args[])

{

int array_variable[][] = {{ 1, 2, 3}, { 4 , 5, 6}, { 7, 8, 9}};

int sum = 0;

for (int i = 0; i < 3; ++i)

for (int j = 0; j <  3 ; ++j)

sum = sum + array_variable[i][j];

System.out.print(sum / 5);

}

}