This PCAP practice question tests your understanding of strings. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
A developer needs to format a floating-point number 123.456789 with exactly 2 decimal places and a width of 10 characters, right-aligned. Which format specifier accomplishes this?
:.2f
Why wrong: No width specified, so output is not padded to 10 characters.
:10.2g
Why wrong: General format; may not display exactly 2 decimal places if not needed.
:10.2e
Why wrong: The 'e' specifier outputs scientific notation, not fixed-point.
:10.2f
Width 10, precision 2, fixed-point formatting.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
:10.2f
Option C is correct because the format specifier '10.2f' means width 10, precision 2, fixed-point. Option A is wrong because '.2f' has no width. Option B is wrong because '10.2e' uses scientific notation. Option D is wrong because '10.2g' uses general format which may not always show 2 decimal places.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
:.2f
Why it's wrong here
No width specified, so output is not padded to 10 characters.
:10.2g
Why it's wrong here
General format; may not display exactly 2 decimal places if not needed.
:10.2e
Why it's wrong here
The 'e' specifier outputs scientific notation, not fixed-point.
:10.2f
Why this is correct
Width 10, precision 2, fixed-point formatting.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
No width specified, so output is not padded to 10 characters.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which PCAP exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Strings — This question tests Strings — Read the scenario before looking for a memorised answer..
The correct answer is: :10.2f — Option C is correct because the format specifier '10.2f' means width 10, precision 2, fixed-point. Option A is wrong because '.2f' has no width. Option B is wrong because '10.2e' uses scientific notation. Option D is wrong because '10.2g' uses general format which may not always show 2 decimal places.
Identify which PCAP exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This PCAP practice question is part of Courseiva's free Python Institute certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCAP exam.
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