200-901 Software Development and Design Practice Question
A Python function needs to handle both expected and unexpected errors during file I/O. Which THREE constructs are essential for robust exception handling? (Choose three.)
⚠ Common exam trap
Cisco often tests the distinction between constructs that handle exceptions (try, except, finally) versus those that control flow (else) or raise exceptions (raise), leading candidates to include optional or non-handling constructs as 'essential'.
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
✓
except
(except) is correct because it is the block that catches exceptions raised during execution of the try block. Without an except clause, any error would propagate unhandled and crash the program. In file I/O, this is essential to catch specific exceptions like FileNotFoundError or PermissionError and respond appropriately.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
except
Why this is correct
Catches specific exceptions.
- ✗
else
Why it's wrong here
Optional; runs if no exception occurs.
- ✓
try
Why this is correct
Defines the block to monitor for exceptions.
- ✗
raise
Why it's wrong here
Used to raise exceptions, not essential for handling.
- ✓
finally
Why this is correct
Executes cleanup code regardless of exception.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco 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 200-901 exam.