PCEP Python Collections Fundamentals

1. What is the output of `my_list = [1, 2, 3]; my_list.append(4); print(len(my_list))`?

3

4

5

[1, 2, 3, 4]

2. What is the output of `len({'a': 1, 'b': 2, 'c': 3})`?

1

2

3

6

3. Which method removes and returns the last element from a list?

Remove()

Pop()

Delete()

Clear()

4. What does `my_dict = {'a': 1, 'b': 2}; my_dict['c'] = 3` result in?

KeyError

{'a': 1, 'b': 2}

{'a': 1, 'b': 2, 'c': 3}

None

5. Which statement is true about list comprehensions?

They can only create new lists

They are slower than for loops

They provide a concise way to create lists

They cannot use conditional logic

6. What does `my_list[1:3]` return from `my_list = [0, 1, 2, 3, 4]`?

[0, 1, 2]

[1, 2]

[1, 2, 3]

[2, 3, 4]

7. Which collection type uses key-value pairs?

List

Set

Dictionary

Tuple

8. Which method removes all elements from a list?

Remove()

Pop()

Clear()

Delete()

9. What is the result of `{1, 2, 3} & {2, 3, 4}`?

{1, 2, 3, 4}

{2, 3}

{1, 4}

TypeError

10. Which collection type in Python is ordered, mutable, and allows duplicate elements?

List

Tuple

Set

Dictionary

11. What is the correct syntax to access the first element of a list named `items`?

Items[1]

Items[0]

Items.first()

Items(0)

12. Which of the following is an unordered collection with no duplicates?

List

Tuple

Set

String

13. What does `my_tuple = (1,); print(type(my_tuple))` output?

SyntaxError

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PCEP Python Collections Fundamentals Quiz

1. What is the output of `my_list = [1, 2, 3]; my_list.append(4); print(len(my_list))`?

2.

What first name or nickname would you like us to use?

2. What is the output of `len({'a': 1, 'b': 2, 'c': 3})`?

3. Which method removes and returns the last element from a list?

4. What does `my_dict = {'a': 1, 'b': 2}; my_dict['c'] = 3` result in?

5. Which statement is true about list comprehensions?

6. What does `my_list[1:3]` return from `my_list = [0, 1, 2, 3, 4]`?

7. Which collection type uses key-value pairs?

8. Which method removes all elements from a list?

9. What is the result of `{1, 2, 3} & {2, 3, 4}`?

10. Which collection type in Python is ordered, mutable, and allows duplicate elements?

11. What is the correct syntax to access the first element of a list named `items`?

12. Which of the following is an unordered collection with no duplicates?

13. What does `my_tuple = (1,); print(type(my_tuple))` output?

14. The `list.insert(index, value)` method inserts a value at a specified ____.

15. The method `dict.keys()` returns ____ of the dictionary.

16. Negative indexing in lists starts from ____.

17. The `dict.get(key)` method returns None if the key does not exist, rather than raising a ____.

18. Sets in Python automatically ____ duplicate values.

19. Tuples in Python are ____.

20. The `sorted()` function returns a new ____ containing sorted elements.