CPT121-Task 1.1.3 Variables, Types and Casting Solved

1.     Give appropriate declarations (type and name) for variables used to store the following values:

a)   An employee's taxable salary      e) The average rainfall for the past month

b)   The month number within a year            f) A letter to hold an answer (‘y’ or ‘n’)

c)    An employee identification number       g) The constant string "Hello"       

d)   The capacity of a tank in cubic inches     h) The conversion rate from $AUS to $US

 

 

2.     Assuming that the types of the variables x, y,  and z  are int, float  and double  respectively, which of the following statement(s) are likely to result in error ?

 

                             a) x = y;              b) x = z;               c) y = x;

                             d) y = z;              e) z = x;                f) z = y;

 

3.     The following code segment prints an incorrect result (instead of the expected result of sqr = 10000000000 ). 

int num1 = 100000; int sqr = num1 * num1;

System.out.println("sqr = " + sqr);

 

Describe the problem / error that has occurred and suggest a solution or work-around to the problem which will allow the correct result to be stored and printed.