PCEP Computer Programming and Python Fundamentals Practice Question
A function is defined as:
def add(a, b=5):
return a + bWhat is the result of add(10)?
⚠ Common exam trap
Python Institute often tests the misconception that default parameters are required or that omitting them causes an error, leading candidates to pick 'Error' (option D) when the function is actually called correctly with a single argument.
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
✓
15
The function `add(a, b=5)` defines a default value of 5 for parameter `b`. When called as `add(10)`, the argument 10 is assigned to `a`, and `b` uses its default value of 5. The function returns `10 + 5 = 15`, making option C correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
10
Why it's wrong here
b not used.
- ✗
5
Why it's wrong here
a is 10, not b.
- ✓
15
Why this is correct
Uses default b=5.
- ✗
Error
Why it's wrong here
Function is valid.
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