Explain the origin and the use of .class file in Java Programming.

Requirements: See attached file

Question One

Explain the origin and the use of .class file in Java Programming.

Question Two

Write a program that takes the birth year from the user and prints her/his age. Here are sample runs of the program:

Sample 1:

Enter your birth year: 1981

Your Age is: 42 years

Sample 2:

Enter your birth year: 2000

Your Age is: 23 years

Question Three

What is the output of each of the following? (Note: if there is an error, you must specify the type of the error: syntax error or runtime error or logic error)

a) (0.5 marks)

double a = 5;

double b = 2;

System.out.println(a+b);

b) (0.5 marks)

String a = “5”;

String b = “2”;

System.out.println(a+b);

c) (0.5 marks)

int a = “5”;

int b = “2”;

System.out.println(a+b);

d) (0.5 marks)

int a = 5;

int b = 0;

System.out.println(a/b);

e) (0.5 marks)

int a = 5;

int b = 2;

System.out.println(a%b);

f) (0.5 marks)

int a = 5;

int b = a++;

b +=5;

System.out.println(b++);