The correct answer is the list comprehension `[s.split(':')[1].strip() for s in feedback if s.split(':')[0].strip() in ('4','5')]` because it cleanly combines string splitting with conditional filtering. This snippet works by calling `.split(':')` on each feedback string, which separates the rating from the comment at the colon delimiter, then uses index `[1]` to extract the comment portion and `.strip()` to remove any surrounding whitespace. The `if` clause checks that the rating at index `[0]`, also stripped, is exactly `'4'` or `'5'`, ensuring only high-rated comments are kept. On the PCAP exam, this tests your understanding of string methods, list comprehensions, and conditional logic—a common trap is forgetting to strip whitespace, which would cause a rating like `'4 '` to fail the equality check. A useful memory tip: always strip before you split and compare, or your filter will miss valid data.
PCAP Strings Practice Question
This PCAP practice question tests your understanding of strings. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are a developer at a company that processes customer feedback. Each feedback entry is stored as a string containing a rating (1-5) followed by a colon and then the comment. For example: '4: Great service'. You need to extract only the comments from feedback that have a rating of 4 or 5. You have a list of feedback strings. Which code snippet correctly implements this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
[s.split(':')[1].strip() for s in feedback if s.split(':')[0].strip() in ('4','5')]
Option C is correct because it splits each feedback string on ':', extracts the comment (index [1]), strips whitespace, and filters only those entries where the rating (index [0], stripped) is exactly '4' or '5'. This ensures only comments from high-rated feedback are collected, handling potential spaces around the colon.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
[s for s in feedback if s.startswith('4') or s.startswith('5')]
Why it's wrong here
This returns the full string, not just the comment, and may include ratings like '45'.
✗
[s.split(':') for s in feedback][1]
Why it's wrong here
This is syntactically incorrect and does not filter.
✓
[s.split(':')[1].strip() for s in feedback if s.split(':')[0].strip() in ('4','5')]
Why this is correct
Correctly extracts comment after verifying rating is 4 or 5.
Related concept
Read the scenario before looking for a memorised answer.
✗
[s.split(':')[1] for s in feedback if '4' in s or '5' in s]
Why it's wrong here
This would include any comment containing '4' or '5', not just ratings.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Python Institute often tests the difference between substring matching (using 'in') and exact prefix matching (using startswith or split-based comparison), leading candidates to choose Option D because they overlook that '4' or '5' could appear anywhere in the string, not just as the rating.
Detailed technical explanation
How to think about this question
The split(':') method returns a list of two strings (rating and comment) when the colon is present; indexing [0] gets the rating and [1] gets the comment. The strip() method removes leading/trailing whitespace, which is crucial because real-world data may have spaces like '4 : Great service'. The condition `s.split(':')[0].strip() in ('4','5')` performs an exact membership check against a tuple, which is more robust than substring matching or startswith, as it avoids false positives from multi-digit ratings or embedded digits.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Strings — This question tests Strings — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: [s.split(':')[1].strip() for s in feedback if s.split(':')[0].strip() in ('4','5')] — Option C is correct because it splits each feedback string on ':', extracts the comment (index [1]), strips whitespace, and filters only those entries where the rating (index [0], stripped) is exactly '4' or '5'. This ensures only comments from high-rated feedback are collected, handling potential spaces around the colon.
What should I do if I get this PCAP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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