Question 1

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):

Accepted Answer

A) True 
 B)False  True

Question 2

When will the following loop terminate?
While keep_on_going != 999:

Accepted Answer

A)   when keep_on_going refers to a value less than 999
B)   when keep_on_going refers to a value greater than 999
C)   when keep_on_going refers to a value equal to 999
D)   when keep_on_going refers to a value not equal to 999E) A) and C)
F) A) and B)

Question 3

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?

Accepted Answer

A)   total + number = total
B)   number += number
C)   total += number
D)   total = numberE) B) and C)
F) None of the above

Question 4

A variable used to keep a running total is called a(n)

Accepted Answer

A)   accumulator
B)   total
C)   running total
D)   summerE) None of the above
F) All of the above

Question 5

The integrity of a program's output is only as good as the integrity of its input.
For this reason,the program should discard input that is invalid and prompt the user to enter valid data.

Accepted Answer

A) True 
 B)False  True

Question 6

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.

Accepted Answer

A) True 
 B)False

Question 7

Functions can be called from statements in the body of a loop and loops can be called from within the body of a function.

Accepted Answer

A) True 
 B)False

Question 8

A(n)__________ validation loop is sometimes called an error trap or an error handler.

Accepted Answer

The answer of A(n)__________ validation loop is sometimes called an...

Question 9

What are the values that the variable num contains through the iterations of the following for loop?
For num in range(2,9,2) :

Accepted Answer

A)   2, 3, 4, 5, 6, 7, 8, 9
B)   2, 5, 8
C)   2, 4, 6, 8
D)   1, 3, 5, 7, 9E) A) and D)
F) A) and C)

Question 10

In Python,an infinite loop usually occurs when the computer accesses an incorrect memory address.

Accepted Answer

A) True 
 B)False

Question 11

What will be displayed after the following code is executed?

Accepted Answer

A)   counting counting counting counting
B)   countingCountingCountingCounting
C)   countingCounting
D)   countingCountingCountingE) B) and C)
F) A) and B)

Question 12

A(n)__________ total is a sum of numbers that accumulates with each iteration of the loop.

Accepted Answer

The answer of A(n)__________ total is a sum of numbers...

Question 13

The following for loop iterates ___________ times to draw a square.
for x in range(4):
turtle.forward(200)
turtle.right(90)

Accepted Answer

The answer of The following for loop iterates ___________ times...

Question 14

In Python,a comma-separated sequence of data items that are enclosed in a set of brackets is called

Accepted Answer

A)   sequence
B)   variable
C)   value
D)   listE) B) and D)
F) C) and D)

Question 15

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.

Accepted Answer

A)   target variable
B)   loop variable
C)   for variable
D)   count variableE) B) and C)
F) A) and D)

Question 16

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

Accepted Answer

A)   condition-controlled loop
B)   number-controlled loop
C)   count-controlled loop
D)   Boolean-controlled loopE) A) and B)
F) All of the above

Question 17

What will be displayed after the following code is executed?
total  =0 =0 =0  
for count in range  (4,6) : (4,6) : (4,6) :  
 \quad total  += += +=  count 
 \quad print (total)

Accepted Answer

A)   49
B)   456
C)   45
D)   9 E) B) and C)
F) A) and D)

Question 18

In a nested loop,the inner loop goes through all of its iterations for each iteration of the outer loop.

Accepted Answer

A) True 
 B)False  True

Question 19

A while loop is called a pretest loop because the condition is tested after the loop has had one iteration.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 4: Repetition Structures

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):

Correct AnswerverifiedTrue

When will the following loop terminate? While keep_on_going != 999:

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

A variable used to keep a running total is called a(n)

Correct AnswerverifiedShow Answer

The integrity of a program's output is only as good as the integrity of its input. For this reason,the program should discard input that is invalid and prompt the user to enter valid data.

Correct AnswerverifiedTrue

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.

Correct AnswerverifiedShow Answer

Functions can be called from statements in the body of a loop and loops can be called from within the body of a function.

Correct AnswerverifiedShow Answer

A(n)__________ validation loop is sometimes called an error trap or an error handler.

Correct AnswerverifiedShow Answer

What are the values that the variable num contains through the iterations of the following for loop? For num in range(2,9,2) :

Correct AnswerverifiedShow Answer

In Python,an infinite loop usually occurs when the computer accesses an incorrect memory address.

Correct AnswerverifiedShow Answer

What will be displayed after the following code is executed?

Correct AnswerverifiedShow Answer

A(n)__________ total is a sum of numbers that accumulates with each iteration of the loop.

Correct AnswerverifiedShow Answer

The following for loop iterates ___________ times to draw a square. for x in range(4): turtle.forward(200) turtle.right(90)

Correct AnswerverifiedShow Answer

In Python,a comma-separated sequence of data items that are enclosed in a set of brackets is called

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What will be displayed after the following code is executed? total =0 =0 =0 for count in range (4,6) : (4,6) : (4,6) : \quad total += += += count \quad print (total)

Correct AnswerverifiedShow Answer

In a nested loop,the inner loop goes through all of its iterations for each iteration of the outer loop.

Correct AnswerverifiedTrue

A while loop is called a pretest loop because the condition is tested after the loop has had one iteration.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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What will be displayed after the following code is executed? total $=0$ for count in range $(4,6) :$ $\quad$ total $+=$ count $\quad$ print (total)

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