Topic Three

Question 1

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

a. Boolean
b. condition
c. decision
d. count

Answer 1

b. condition

Question 2

A _________ controlled loop repeats a specific number of times

a. Boolean
b. condition
c. decision
d. count

Answer 2

d. count

Question 3

Each repetition of a loop is known as a (n) ___________

a. cycle
b. revolution
c. orbit
d. iteration

Answer 3

d. iteration

Question 4

The while loop is a _________ type of loop

a. pretest
b. no-test
c. prequalified
d. post-iterative

Answer 4

a. pretest

Question 5

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

a. indeterminate
b. interminable
c. infinite
d. timeless

Answer 5

c. infinite

Question 6

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

a. relational
b. augmented assignment
c. complex assignment
d. reverse assignment

Answer 6

b. augmented assignment

Question 7

A (n) _________ variable keeps a running total

a. sentinel
b. sum
c. total
d. accumulator

Answer 7

d. 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.

a. sentinel
b. flag
c. signal
d. accumulator

Answer 8

a. sentinel

Question 9

GIGO stands for _____________ .

a. great input, great output
b. garbage in, garbage out
c. GIGahertz Output
d. GIGabyte Operation

Answer 9

b. garbage in, garbage out

Question 10

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

a. compiler
b. programming language
c. input
d. debugger

Answer 10

c. input

Question 11

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

a. prevalidation read
b. primordial read
c. initialization read
d. priming read

Answer 11

d. priming read

Question 12

Validation loops are also known as _______________

a. error traps
b. doomsday loops
c. error avoidance loops
d. defensive loops

Answer 12

a. error traps

Question 13

Reducing the duplication of code is one of the advantages of using a loop structure.

True or False

Answer 13

True

Question 14

In a flowchart, both the decision structure and the repetition structure use the diamond symbol to represent the condition that is tested.

True or False

Answer 14

True

Question 15

Both of the following for clauses would generate the same number of loop iterations.

for num in range(4):
for num in range(1, 5):

True or False

Answer 15

True

Question 16

To get the total number of iterations in a nested loop, add the number of iterations in the inner loop to the number in the outer loop.

True or False

Answer 16

False

Question 17

What type of loop structure repeats the code based on the value of Boolean expression?

number-controlled loop
Boolean-controlled loop
count-controlled loop
condition-controlled loop

Answer 17

condition-controlled loop

Question 18

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

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

2, 5, 8
2, 3, 4, 5, 6, 7, 8, 9
1, 3, 5, 7, 9
2, 4, 6, 8

Answer 18

2, 4, 6, 8

Question 19

__________ is the process of inspecting data that has been input into a program in order to ensure that the data is valid before it is used in a computation.

Input validation
Data validation
Correcting data
Correcting input

Answer 19

Input validation

Question 20

When will the following loop terminate?

while keep_on_going != 999:

a. when keep_on_going refers to a value greater than 999
b. when keep_on_going refers to a value not equal to 999
c. when keep_on_going refers to a value less than 999
d. when keep_on_going refers to a value equal to 999

Answer 20

d. when keep_on_going refers to a value equal to 999

Question 21

In Python, the variable in the for clause is referred to as the __________ because it is the target of an assignment at the beginning of each loop iteration.

count variable
loop variable
target variable
for variable

Answer 21

target variable

Question 22

Which of the following represents an example to calculate the sum of numbers (that is, an accumulator), given that the number is stored in the variable number and the total is stored in the variable total?

total + number = total
number += number
total = number
total += number

Answer 22

total += number

Question 23

What will be displayed after the following code is executed?

count = 4
while count < 12:
print(“counting”, end= ‘ ‘)
count = count + 2

counting counting counting
counting counting counting counting
counting counting counting counting counting
counting counting

Answer 23

counting counting counting counting

Question 24

What will be displayed after the following code is executed?

for num in range(0, 20, 5):
num += num
print(num)

a. 30
b. 5 10 15
c. 25
d. 0 5 10 15 20

Answer 24

30

Question 25

When you execute the following command, what is the output? >>> list(range(8)) a. [0, 1, 2, 3, 4, 5, 6, 7, 8] b. [0, 1, 2, 3, 4, 5, 6, 7] c. [(0, 8)] d. [1, 2, 3, 4, 5, 6, 7, 8]

Answer 25

b. [0, 1, 2, 3, 4, 5, 6, 7]

Question 26

When you execute the following command, what is the output? >>> list(range(7, 11)) a. [7, 11] b. [7, 8, 9, 10] c. [0, 1, 2, 3, 4, 5, 6, 7, 11] d. [7, 8, 9, 10, 11]

Answer 26

b. [7, 8, 9, 10]

Question 27

When you execute the following command, what is the output? >>> list(range(5, 16, 3)) a. [5, 8, 11, 14] b. [5, 6, 8, 9, 11, 12, 14, 15] c. [5, 7, 8, 10, 11, 13, 14, 16] d. [5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16]

Answer 27

a. [5, 8, 11, 14]