JAVA TEST

An expression involving byte, int, and literal numbers is promoted to which of these?

Which of these is an incorrect array declaration?

What will be the output of the following Java code?

class array_output

{

public static void main(String args[])

{

char array_variable [] = new char[10];

for (int i = 0; i < 10; ++i)

{

array_variable[i] = ‘i’;

System.out.print(array_variable[i] + “”);

}

}

}

An array elements are always stored in ________ memory locations

Modulus operator, %, can be applied to which of these?

With x = 0, which of the following are legal lines of Java code for changing the value of x to 1?

1. x++;
2. x = x + 1;
3. x += 1;
4. x =+ 1;

What will be the output of the following Java code?
class Relational_operator

{

public static void main(String args[])

{

int var1 = 5;

int var2 = 6;

System.out.print(var1 > var2);

}

}

What will be the output of the following Java code?

class operators

{

public static void main(String args[])

{

int x = 8;

System.out.println(++x * 3 + ” ” + x);

}

}

What will be the output of the following Java program?

class selection_statements

{

public static void main(String args[])

{

int var1 = 5;

int var2 = 6;

if ((var2 = 1) == var1)

System.out.print(var2);

else

System.out.print(++var2);

}

}

What would be the output of the following code snippet if variable a=10?
if(a<=0)

{

if(a==0)

{

System.out.println(“1 “);

}

else

{

System.out.println(“2 “);

}

}
System.out.println(“3 “);

When does method overloading is determined?

Which concept of Java is a way of converting real world objects in terms of class?

What is it called where child object gets killed if parent object is killed?

What will be the output of the following Java program?

class main_class

{

public static void main(String args[])

{

int x = 9;

if (x == 9)

{

int x = 8;

System.out.println(x);

}

}

}

In the following Java code, which call to sum() method isappropriate?

class Output

{
public static int sum(int …x)
{
return;
}

static void main(String args[])

{

sum(10);

sum(10,20);

sum(10,20,30);

sum(10,20,30,40);

}

}

What would be the behaviour if this() and super() used in a method?

What will be the output of the following Java code?( Overloading Methods & Argument Passing)

class overload

{

int x;

int y;

void add(int a)

{

x =  a + 1;

}

void add(int a, int b)

{

x =  a + 2;

}

}

class Overload_methods

{

public static void main(String args[])

{

overload obj = new overload();

int a = 0;

obj.add(6);

System.out.println(obj.x);

}

}

What will be the output of the following Java program?(Inheritance)

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();
}
}

What will be the output of the following Java program?
class exception_handling
{
public static void main(String args[])
{
try
{
System.out.print(“Hello” + ” ” + 1 / 0);
}
catch(ArithmeticException e)
{
System.out.print(“World”);
}
}
}