Free Practice Quiz Question List

1 Programming Foundations for Data Science Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Programming Foundations for Data Science, test your knowledge, and prepare for your next test or exam.

20 questions

Choose one

1 point

Which Python collection is an ordered, changeable sequence that suits values you may add, remove, or update?

A
A tuple, because it is ordered and changeable.
B
A list, because it is ordered and changeable.
C
A set, because it is ordered and changeable.
D
A dictionary, because it is an ordered sequence accessed by position.

True or false

1 point

True or false: In Python, the value "12" has type int because it contains digits.

A
True
B
False

Written response

1 point

What is the built-in type name of the Python value None?

Fill in the blank

1 point

A dictionary value is retrieved by looking up a rather than by position.

Choose one

1 point

A data-cleaning task needs to remove duplicate site names and check whether a site is present. Which collection is the best fit?

A
A tuple
B
A list
C
A set
D
A dictionary

Choose all

1 point

Select all statements that correctly describe lists and tuples in Python.

A
A list is ordered and changeable.
B
A tuple is changeable after creation.
C
A tuple is ordered and not changeable after creation.
D
A list has no positional indexing.

True or false

1 point

True or false: In a Python condition, both zero and an empty collection are treated as false.

A
True
B
False

Written response

1 point

Given location = (40.7, -74.0), what numeric value does location[1] produce?

Choose one

1 point

What value is assigned to label by this code when score is 75?

if score is None:
    label = "missing"
elif score >= 80:
    label = "high"
else:
    label = "other"

A
"missing"
B
"high"
C
"other"
D
The code raises an error because 75 is not None.

Fill in the blank

1 point

A for loop visits each in an iterable.

Choose all

1 point

Select all statements that correctly describe Python functions.

A
A parameter can provide an input to a function.
B
A function must have a return statement to run.
C
A return statement can send a result back to the caller.
D
A function that reaches its end without return returns 0.

Choose one

1 point

Inside a loop, which keyword skips the rest of the current iteration and proceeds to the next one?

A
break
B
continue
C
return
D
elif

True or false

1 point

True or false: To avoid an endless while loop, its condition should be able to become false eventually.

A
True
B
False

Open ended

1 point

Explain how mean_score handles missing scores and avoids division by zero when no scores are available.

Written response

1 point

How many times does the loop body run in for i in range(4):?

Written response

1 point

Given location = (40.7, -74.0), what value does location[0] return? Enter the value as a number.

Choose one

1 point

What is true after these statements run?

reading = 18
reading = "unavailable"

A
Python raises an error because a variable must keep its original type.
B
The name reading refers to the string value after the second assignment.
C
The second assignment changes the string into an integer.
D
The name reading refers to both values at the same time.

Choose one

1 point

A program receives an external text field that may contain "27x". What should its author keep in mind before using int(field)?

A
The conversion always succeeds because the input is a string.
B
The conversion silently changes invalid characters to zero.
C
The conversion may fail, so the external value should be checked before relying on it.
D
The conversion always returns None when the text is invalid.

Choose one

1 point

What happens when break runs inside the inner loop in this nested-loop structure?

for group in groups:
    for item in group:
        if should_stop(item):
            break

A
The inner loop stops, and the outer loop can continue.
B
Both loops stop immediately.
C
Only the outer loop stops; the inner loop continues.
D
The program skips the current iteration of both loops and resumes both.

Choose one

1 point

Given score = 86 and attempts = 3, what is the result of this condition?

score >= 80 and attempts < 3

A
The condition is true because score is at least 80.
B
The condition is true because attempts is less than 3.
C
The condition is true because and means either comparison may be true.
D
The condition is false because one of the two comparisons is false.