java

What is the output?

public class testincr

{

public static void main(String args[])

{

int i = 0;

i = i++ + i;

System.out.println(“I = ” +i);

}

}

• (a) I = 0

• (b) I = 1

• (c) I = 2

• (d) I = 3

Multiple inheritance means?

• one class inheriting from more super classes

• more classes inheriting from one super class

Which statement is not true in java language

• A public member of a class can be accessed in all the packages.

• A private member of a class cannot be accessed by the methods of the same class.

What is the type and value of the following expression? (Notice the integer division)

-4 + 1/2 + 2*-3 + 5.0

• int -5

• double -4.5

• int -4

• double -5.0

public static int foo(int a, String s)

{

s = “Yellow”;

a=a+2;

return a;

}

public static void bar()

{

int a=3;

String s = “Blue”;

a = foo(a,s);

System.out.println(“a=”+a+” s=”+s);

}

public static void main(String args[])

{

bar();

}

• a = 3 s = Blue

• a = 5 s = Yellow

• a = 3 s = Yellow

• a = 5 s = Blue

blic class Test {

public static void main( String[] args ) {

int[] a = { 430, 1, 245, 3, 416, , 5, 243, 123, 77}; // int result = 0;

// for ( int i = 0; i < a.length; i++ )

// {

// if(a[i]>10)

// result+=a[i];}

System.out.printf( "Result is: %d\n", a[9] ); System.out.printf( "Result is: %d\n", a[a[2]-a[0]] );

• Result is 77, result is 7

• Result is 123, result is 23

• Result is 416, result is 316

• Result is 430, result is 330

What is information being hide the implemented in Java?

• It’s declare then create the array.

• Create object in java

• The private variables and defining public methods to access them.

• Local variables are automatically initialized

Consider the code segment:int[] g;

g = new int[ 12 ];

• The array made is made of 13 elements

• The array made is made of 11 elements

• The array made is made of 12 elements

• The array made is made of 10 elements

Which one can create a 2-dimensional array called multiples of type double that contains 1 columns and 7 rows

• double [][] multiples = old int[7][1];

• double [][] multiples = double int[7][1];

• double [][] multiples = new int[7][1];

• double [][] multiples = new int[7][1]

Which statement can create a double array containing 14 elements:

• int[] array; array = new double[ 14 ];

• double[] array; array = old double[ 14 ];

• double[] array; array = new double[ 14 ]

• double[] array; array = new double[ 14 ];