Deck 4: Repetition Structures

Question 1

Which of the following represents an example to calculate the sum of the numbers (accumulator)?

A) total + number = total
B) number += number
C) total += number
D) total = number

Answer 1

C

Question 2

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

A) sequence
B) variable
C) value
D) list

Answer 2

D

Question 3

The variable used to keep the running total is called a(n) _____.

A) Accumulator
B) Total
C) running total
D) grand total

Answer 3

A

Question 4

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

A) Condition-controlled loop
B) Number-controlled loop
C) Count-controlled loop
D) Boolean-controlled loop

Question 5

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.

A) target variable
B) loop variable
C) for variable
D) count variable

Question 6

The first line in the while loop is referred to as the condition clause.

Question 7

What is the format for the while clause in Python?

A) while condition
B) while condition :
C) while condition statement
D) while condition : statement

Question 8

What type of loop structure repeats the code a specific number of times?

A) Condition-controlled loop
B) Number-controlled loop
C) Count-controlled loop
D) Boolean-controlled loop

Question 9

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

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 999

Question 10

_____ is the process of inspecting data that has been input to a program to make sure it is valid before it is used in a computation.

A) Input validation
B) Correcting data
C) Data validation
D) Correcting input

Question 11

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

Question 12

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

Question 13

What is the structure that causes a statement or a set of statements to execute repeatedly?

A) Sequence
B) Decision
C) Module
D) Repetition

Question 14

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

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

Question 15

What is the disadvantage of coding in one long sequence structure?

A) Duplicated code makes the program faster to write.
B) Writing a long sequence of statements is error prone.
C) If parts of the duplicated code have to be corrected, the correction has to be made many times.
D) It does not make use of decision structures.

Question 16

What is not an example of an augmented assignment operator?

A) *=
B) /=
C) -=
D) <=

Question 17

A better way to repeatedly perform an operation is to write the statements for the task once, and then place the statements in a loop that will repeat the statements as many times as necessary.

Question 18

The first input operation is called the _____, and its purpose is to get the first input value that will be tested by the validation loop.

A) priming read
B) first input
C) loop set read
D) loop validation

Question 19

What are the values that the variable num contains through the iterations of the following for loop?
For num in range(4)

A) 1, 2, 3, 4
B) 0, 1, 2, 3, 4
C) 1, 2, 3
D) 0, 1, 2, 3

Question 20

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

Question 21

A(n) _______________-controlled loop causes a statement or set of statements to repeat as long as a condition is true.

Question 22

In Python, you would use the _______________ statement to write a count-controlled loop.

Question 23

The acronym _______________ refers to the fact that the computer cannot tell the difference between good data and bad data.

Question 24

A(n) _______________ is a special value that marks the end of a sequence of items.

Question 25

The _______________ function is a built-in function that generates a list of integer values.

Question 26

A(n) _______________ loop usually occurs when the programmer forgets to write code inside the loop that makes the test condition false.

Question 27

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

Question 28

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):

Question 29

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

Question 30

The while loop is known as a(n) _______________ loop because it tests conditions before performing an iteration.

Question 31

A(n) _______________ structure causes a statement or set of statements to execute repeatedly.

Question 32

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 correct data.

Question 33

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

Question 34

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