Control Flow Quiz | Python | AlgoMaster.io

1

Code Completion

Complete the expression to check if access_level is not equal to 0 before printing a message

python

1

print(access_level 0)

Click an option to fill the blank:

2

Code Completion

Complete the expression to iterate over numbers 0 through 4 when building a list of squares

python

1

squares = [n * n for n in (5)]

Click an option to fill the blank:

3

Code Completion

Complete the expression to choose 'adult' when age is 18 or more, otherwise 'minor'

python

1

status = 'adult' if age >= 18 'minor'

Click an option to fill the blank:

4

Multiple Choice

You want to run a block of code only when a condition is false. Which structure is most suitable?

5

Multiple Choice

Which statement best describes an elif clause?

6

Multiple Choice

When is a ternary (conditional) expression most appropriate?

7

Multiple Choice

What does this loop do? for name in users: print(name)

8

Multiple Choice

Which while loop condition is most likely to create an infinite loop if count is not changed inside the loop?

9

Multiple Choice

In a for loop, what does the continue statement do?

10

Multiple Choice

When will the else block of a for loop execute?

11

Multiple Choice

What is a common use case for nested loops?

12

Multiple Choice

In match-case, what does the underscore (_) pattern represent?

13

Multiple Choice

You want to validate input until it is correct. Which loop is typically more appropriate?

14

Multiple Choice

What happens when break is executed inside a while loop that has an else clause?

15

Sequencing

Order the steps to use a while loop that counts down from 3 and then prints 'Go!'.

Drag and drop to reorder, or use the arrows.

16

Sequencing

Order the steps to use match-case to handle different HTTP status codes.

Drag and drop to reorder, or use the arrows.

17

Output Prediction

What is the output of this code? status = 'member' message = 'Welcome' if status == 'member' else 'Please sign up' print(message)

1status = 'member'
2message = 'Welcome' if status == 'member' else 'Please sign up'
3print(message)

18

Output Prediction

What is the output of this code? level = 5 if level > 10: result = 'high' else: result = 'low' print(result)

1level = 5
2if level > 10:
3    result = 'high'
4else:
5    result = 'low'
6print(result)

19

Output Prediction

What is the output of this code? items = [1, 3, 5] for number in items: if number % 2 == 0: print('even') break else: print('no even numbers')

1items = [1, 3, 5]
2for number in items:
3    if number % 2 == 0:
4        print('even')
5        break
6else:
7    print('no even numbers')

20

Output Prediction

What is the output of this code? matrix = [[1, 2], [3, 4]] product = 1 for row in matrix: for value in row: product *= value print(product)

1matrix = [[1, 2], [3, 4]]
2product = 1
3for row in matrix:
4    for value in row:
5        product *= value
6print(product)

21

Output Prediction

What is the output of this code? value = 'hello' match value: case 'hi': msg = 'short greeting' case 'hello': msg = 'longer greeting' case _: msg = 'unknown' print(msg)

1value = 'hello'
2match value:
3    case 'hi':
4        msg = 'short greeting'
5    case 'hello':
6        msg = 'longer greeting'
7    case _:
8        msg = 'unknown'
9print(msg)

22

Bug Spotting

Find the bug in this code that searches for a username using a for-else loop.

Click on the line(s) that contain the bug.

python

1

def find_user(target, users):

2

    for user in users:

3

        if user == target:

4

            return True

5

        break

6

    else:

7

        return False

23

Bug Spotting

Find the bug in this code that should count down using a while loop.

Click on the line(s) that contain the bug.

python

1

def countdown(start):

2

    value = start

3

    while value >= 0:

4

        print(value)

5

        value + 1

6

24

Matching

Match each keyword with its effect on loop execution.

Click an item on the left, then click its match on the right. Click a matched item to unmatch.

25

Matching

Match each control-flow construct with a typical use case.

Click an item on the left, then click its match on the right. Click a matched item to unmatch.

26

Fill in the Blanks

Complete the code to use a for-else loop that reports when a discount code is not found.

python

1

def has_discount(search_code, all_codes):

2

for discount in all_codes:

3

if discount == search_code:

4

return

5

else:

6

return

Click an option to fill blank 1:

27

Fill in the Blanks

Complete the code to build a multiplication table using nested loops.

python

1

def multiplication_table(limit):

2

for row in :

3

for column in range(1, limit + 1):

4

print(row * column, end=' ')

5

Click an option to fill blank 1:

28

Fill in the Blanks

Complete the code so that a while loop keeps asking until a non-empty name is provided.

python

1

def ask_name(get_input):

2

customer_name = ''

3

while :

4

customer_name = get_input()

5

return

Click an option to fill blank 1:

29

Fill in the Blanks

Complete the code to choose a label with match-case based on a priority number.

python

1

def label_priority(priority):

2

match priority:

3

case 1:

4

return 'high'

5

case 2 | 3:

6

return

7

case _:

8

return

Click an option to fill blank 1:

30

Hotspot Selection

Click the line that prevents this while loop from ever stopping.

Click on the line to select.

python

1

counter = 3

2

while counter > 0:

3

    print(counter)

4

    # missing update to counter here

31

Hotspot Selection

Click the line where the loop should skip processing negative scores.

Click on the line to select.

python

1

scores = [10, -3, 7]

2

for score in scores:

3

    if score < 0:

4

        continue

5

    print('Valid:', score)

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