Final exam review: Computer programming

Question 1: Tracing a program

What is the output of the program show below with the inputs:

(a) 0

(b) 20000

(d) 40000

(e) 100000

def start (income):

     taxCredit = 0
     taxRate = 0
     taxPaid = 0
     afterTaxIncome = 0
     if (income >= 0) and (income <= 20000):

taxRate = 0.1
taxCredit = 1000

if (income > 20000) and (income <= 50000):

taxRate = 0.2

if (income > 50000):

taxRate = 0.3

taxPaid = income * taxRate;
afterTaxIncome = income - taxPaid
print income, taxPaid, afterTaxIncome + taxCredit

What is the output of the following program:

def fun1 (num1, num2):

num1 = num1 * 10

num2 = num2 * 20

print num1, num2

def start ():

num1 = 1

num2 = 2

print num1, num2

fun1 (num1, num2)

print num1, num2

For the program shown below you are to write a function 'swap' so that the contents of variable 'num1' and 'num2' are swapped.

def start ():

num1 = 11

num2 = 17

print num1, num2

num1, num2 = swap (num1, num2)

print num1, num2

	Which of the following is a correct way of defining a program according to the required format for JPython programs?
		def fun write "fun stuff"
		def fun (): write "fun stuff"
		def fun ():
		All of the above approaches are correct.
		None of the above approaches are correct.
	What is the output of the following program?
		def start (): ch = 'X' print 'ch', ch
		ch X ch X X ch None of the above
	How may times will the loop shown below run?
		for i in range (0, 10, 1):
		1 9 10 11 The loop never runs