PCEP Data Structures 2

Question 1

What is the result of `[1, 2, 3] + [4, 5]`?

Accepted Answer

[1, 2, 3, 4, 5]

Answer

The `+` operator concatenates two lists into a single list.

Question 2

Which method removes and returns the last element of a list?

Accepted Answer

pop()

Answer

`pop()` without arguments removes and returns the last element of the list.

Question 3

What does `len({'a': 1, 'b': 2, 'c': 3})` return?

Accepted Answer

3

Answer

`len()` on a dictionary returns the number of key-value pairs.

Question 4

What is the output of `(1, 2, 3)[1:3]`?

Accepted Answer

(2, 3)

Answer

Slicing `[1:3]` on a tuple returns elements at index 1 and 2.

Question 5

Which of the following creates an empty set?

Accepted Answer

set()

Answer

`{}` creates an empty dict, so `set()` is the only way to create an empty set.

(PCEP) Certified Entry-Level Python Programmer Practice Test