Chapter 4

Question 1

A __________ -controlled loop uses a true/false condition to control the number of
times that it repeats.

Answer 1

sentinel loop

Question 2

A __________ -controlled loop repeats a specific number of times.

Answer 2

count-controlled loop

Question 3

Each repetition of a loop is known as a(n) __________.

Answer 3

an iteration

Question 4

The while loop is a __________ type of loop.

Answer 4

pretest loop

Question 5

A(n) __________ loop has no way of ending and repeats until the program is interrupted

Answer 5

infinite

Question 6

The -= operator is an example of a(n) __________ operator.

Answer 6

The -= operator is an example of a(n) __________ operator.

Question 7

A(n) __________ variable keeps a running total.

Answer 7

accumulator

Question 8

A(n) __________ is a special value that signals when there are no more items from a list of items to be processed. This value cannot be mistaken as an item from the list.

Answer 8

sentinel

Question 9

GIGO stands for

Answer 9

garbage in, garbage out

Question 10

The integrity of a program’s output is only as good as the integrity of the program’s

Answer 10

input

Question 11

The input operation that appears just before a validation loop is known as the

Answer 11

priming read

Question 12

Validation loops are also known as

Answer 12

error traps

Question 13

What is a repetition structure?

Answer 13

A structure that causes a section of code to repeat

Question 14

What is a condition-controlled loop?

Answer 14

A loop that uses a true/false condition to control the number of times that it repeats

Question 15

What is a count-controlled loop?

Answer 15

A loop that repeats a specific number of times

Question 16

Validation loops are also known as__

Answer 16

error traps

Question 17

The input operation that appears just before a validation loop is known as the

Answer 17

the priming read

Question 18

What are the values that the variable num contains through the iterations of the following for loop?

for num in range(4):

Answer 18

0,1,2,3

Question 19

What are the values that the variable num contains through the iterations of the following for loop?

for num in range(2, 9, 2):

Answer 19

2,4,6,8

Question 20

What are the values that the variable num contains through the iterations of the following for loop?

for num in range(10, 1, -1):

Question 21

How many numbers of loop iterations will both of the following for clauses generate?
for num in range(4):

Ans:

for num in range(1, 5):

     Ans:

Question 22

What will be displayed after the following code is executed?

total = 0

for count in range(1,4):

total += count

print(total)

Ans:

Question 23

What will be displayed after the following code is executed?
count = 4

while count < 12:

print("counting")

count = count + 2

Question 24

x = 99
while x > 0:
print (x)

ANS: