This PCEP practice question tests your understanding of computer programming and python fundamentals. 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.
A Python script calculates the area of a circle: radius = 5; area = 3.14 * radius ** 2; print(area). What is printed?
78.5
Correct calculation.
157.0
Why wrong: This would be 2 * 3.14 * 25? Not correct.
25.0
Why wrong: Only the radius squared, missing multiplication.
31.4
Why wrong: This would be 3.14 * 10, not 25.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
78.5
The exponentiation operator ** has higher precedence than multiplication, so radius**2 = 25, then 3.14*25 = 78.5. Option A is correct.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
78.5
Why this is correct
Correct calculation.
Related concept
Authentication checks who the user is.
157.0
Why it's wrong here
This would be 2 * 3.14 * 25? Not correct.
25.0
Why it's wrong here
Only the radius squared, missing multiplication.
31.4
Why it's wrong here
This would be 3.14 * 10, not 25.
Common exam traps
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PCEP questions on access control and AAA configuration.
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FAQ
Computer Programming and Python Fundamentals — This question tests Computer Programming and Python Fundamentals — Authentication checks who the user is..
The correct answer is: 78.5 — The exponentiation operator ** has higher precedence than multiplication, so radius**2 = 25, then 3.14*25 = 78.5. Option A is correct.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PCEP questions on access control and AAA configuration.
Authentication checks who the user is.
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Last reviewed: Jun 24, 2026
This PCEP 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 PCEP exam.
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