A game developer wants to generate all possible coordinates (x, y) where x is from 0 to 4 and y is from 0 to 4, but only where x + y is even. They want a flat list of tuples. Which comprehension does this?

[(x, y) for x in range(5) if (x + y) % 2 == 0 for y in range(5)]

[[(x, y) for x in range(5)] for y in range(5) if (x + y) % 2 == 0]

[(x, y) for x in range(5) for y in range(5) if (x + y) % 2 == 0]

[(x, y) for x in range(5) for y in range(5) if x % 2 == 0 and y % 2 == 0]

A financial analyst has a list of stock prices and wants to create a list of all prices that are above the average price. They want a one-liner. Which comprehension is correct?

[p for p in prices if p > sum(prices)/len(prices)]

[p for p in prices if p > sum(prices)/len(prices) and p > 0]

[p for p in prices if p > sum(prices)]

A developer wants to transpose a 3x3 matrix represented as a list of lists. They want to use a nested list comprehension. Which code correctly transposes the matrix?

[[matrix[j][i] for j in range(3)] for i in range(3)]

[[row[i] for row in matrix] for i in range(3)]

[[row[j] for row in matrix] for j in range(3)]

[[matrix[i][j] for j in range(3)] for i in range(3)]

A system administrator has a list of IP addresses and wants to filter out those that are in a private range (e.g., starting with '192.168.'). They want a list comprehension. Which one is correct?

[ip for ip in ips if ip.startswith('192.168.')]

[ip for ip in ips if '192.168.' not in ip]

[ip for ip in ips if not ip.startswith('192.168')]

[ip for ip in ips if not ip.startswith('192.168.')]

A data analyst needs to extract all even numbers from a list of integers, then square each of those even numbers. The result should be a new list. Which list comprehension correctly accomplishes this?

[x**2 for x in numbers if x % 2 != 0]

[x**2 for x in numbers if x % 2 == 0]

[x for x in numbers if x % 2 == 0]

[x for x in numbers if x % 2 == 0 and x**2]

Python InstitutePCAP - Certified Associate Python Programmer

Domain 5Objective 1

PCAP-31-03 5.1 Build Complex Lists Using List Comprehensions PCAP-31 Practice Questions (Page 5)

Part of the Miscellaneous (List Comprehensions, Lambdas, Closures, I/O) domain, which accounts for 22% of the PCAP-31 exam. Python Institute does not publish an official question count, but from its 65-minute exam (~25–45 total, ~6–10 in this domain), expect 1–2 from this objective — we provide 43 practice questions to prepare you well beyond it. (estimate)

43questions here

9free pages

2concepts

22%of the exam

Questions 21–25

21application · medium
A game developer wants to generate all possible coordinates (x, y) where x is from 0 to 4 and y is from 0 to 4, but only where x + y is even. They want a flat list of tuples. Which comprehension does this?
Select an answer first
22application · medium
A financial analyst has a list of stock prices and wants to create a list of all prices that are above the average price. They want a one-liner. Which comprehension is correct?
Select an answer first
23application · medium
A developer wants to transpose a 3x3 matrix represented as a list of lists. They want to use a nested list comprehension. Which code correctly transposes the matrix?
Select an answer first
24application · medium
A system administrator has a list of IP addresses and wants to filter out those that are in a private range (e.g., starting with '192.168.'). They want a list comprehension. Which one is correct?
Select an answer first
25application · medium
A data analyst needs to extract all even numbers from a list of integers, then square each of those even numbers. The result should be a new list. Which list comprehension correctly accomplishes this?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to PCAP-31

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Python Institute. “PCAP-31” is a trademark of its owner, used for identification only.