Question 509 of 498
PCEP Computer Programming and Python Fundamentals Practice Question
Exhibit
numbers = [1, 2, 3, 4, 5]
for i in range(len(numbers)):
if numbers[i] % 2 == 0:
numbers[i] = numbers[i] ** 2
print(numbers)Refer to the exhibit. What is the output?
⚠ Common exam trap
The PCEP exam often tests the distinction between applying a transformation to even versus odd numbers, and candidates frequently misapply the condition or square the wrong subset.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
[1, 4, 3, 16, 5]
The code iterates over the list [1, 2, 3, 4, 5] and for each element, if it is even, it squares it; otherwise, it leaves it unchanged. The resulting list is [1, 4, 3, 16, 5], which matches option B.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
[1, 2, 3, 4, 5]
Why it's wrong here
A list [1, 2, 3, 4, 5]. This is incorrect because the code squares even numbers, not all numbers.
- ✓
[1, 4, 3, 16, 5]
Why this is correct
A tuple (1, 4, 3, 16, 5). Although it is a tuple, the values match the expected output of the code, so it is correct.
- ✗
[1, 2, 9, 4, 25]
Why it's wrong here
The string '1,2,9,4,25'. This is incorrect because it is a string, not a list or tuple, and the values mistakenly square odd numbers.
- ✗
[1, 4, 9, 16, 25]
Why it's wrong here
A list [1, 4, 9, 16, 25]. This is incorrect because it squares every number, not just even numbers.
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Last reviewed: Jul 4, 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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