Week-4 Repetition

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

• Duplicated code makes the program faster to write.

• Writing a long sequence of statements is error prone.

• If parts of the duplicated code have to be corrected, the correction has to be made many times.

• It does not make use of decision structures.

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

• Condition-controlled loop

• Number-controlled loop

• Count-controlled loop

• Boolean-controlled loop

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

• 2, 5, 8

• 2, 4, 6, 8

• 1, 3, 5, 7, 9

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

• Accumulator

• Total

• running total

• grand total

_____ 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.

• Input validation

• Correcting data

• Data validation

• Correcting input

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.

• priming read

• first input

• loop set read

• loop validation

When will the following loop terminate?

while keep_on_going != 999 :

• When keep_on_going refers to a value less than 999

• When keep_on_going refers to a value greater than 999

• When keep_on_going refers to a value equal to 999

• When keep_on_going refers to a value not equal to 999

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

• sequence

• variable

• value

• list

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.

• target variable

• loop variable

• for variable

• count variable

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

• total + number = total

• number += number

• total += number

• total = number