Write output of the following program which is based on summation of different data types.

class SP_DataSum
{
  public static void main(String[] args)
  {
    int n=12;
    double d=12.0;
    float f=12.0f;
    byte b=12;
    char c=12;
    System.out.println(n+d+f+b+c);
  }
}

Find output of following data type size determination instructions using wrapper class declarations.

Integer n=12;
Double d=12.0;
Float f=12.0f;
Character c=12;
Short s=12;
Long l=12L;
Byte b=12;
System.out.println(n.SIZE);
System.out.println(d.SIZE);
System.out.println(f.SIZE);
System.out.println(c.SIZE);
System.out.println(s.SIZE);
System.out.println(l.SIZE);
System.out.println(b.SIZE);

Write a program to initialise a variable with price of an item as a fractional value. Then prepare another variable to output the price multiplied with 100 so that its lowest currency denomination (LCD) value is achieved. Print the LCD price with a suitable message. Choose appropriate variable names and data types.

Why do we need to initialise local variables when we have default values specified for all primitive data types.

Why do we add f suffix to a decimal literal number when we initialise a float variable.

Write the output:
char ch = ‘F’;
int m = ch;
m=m+5;
System.out.println(m + ” ” + ch);

List the variables from those given below that are composite data types.
(i) static int x;
(ii) arr[i] = 10;
(iii) obj.display();
(iv) boolean b;
(v) private char chr;
(vi) String str;

Name the primitive data type in Java that is:
(i) a 64-bit integer and is used when you need a range of values wider than those provided by int.
(ii) a single 16-bit Unicode character whose default value is ‘u0000′

What are the default values of the primitive datatypes int and float?

Arrange the following primitive data types in an ascending order of their size:
(i) char (ii) byte (iii) double (iv) int

Classify the following as primative or non-primative datatypes:
(i) char
(ii) arrays
(iii)int
(iv) classes

(1) int res = ‘A’;
What is the value of res?

(ii) Name the package that contains wrapper classes.

State the number of bytes occupied by char and int data types.

What are the types of casting shown by the following examples:
(i) char c = (char)120;
(ii) int x = ‘t’;

Write one difference between primitive data types and composite data types.

Write the output:
char ch = ‘F’;
int m = ch;
m=m+5;
System.out.println(m + ” ” + ch);