This PCEP practice question tests your understanding of control flow, loops, lists and logic. 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 developer is writing a simple number guessing game. The computer picks a random number between 1 and 100, and the user keeps guessing until correct. The developer implements:
secret = random.randint(1,100) guess = 0
while guess != secret:
guess = int(input("Guess: "))
if guess == secret:
print("Correct!")else:
print("Wrong, try again.")The game works, but the developer notices that if the user enters something that is not an integer, the program crashes. Which modification ensures the program handles non-integer input gracefully?
Use a while True loop with break
Why wrong: Does not handle non-integer input.
Change the data type of guess to string
Why wrong: Then comparison guess != secret would always be True, infinite loop.
Use a try-except around the input conversion
Catches ValueError and allows reprompt.
Add an if statement to check if input is digit
Why wrong: String.isdigit() returns False for negative numbers and floats, still crashes.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use a try-except around the input conversion
Option C is correct because wrapping the `int(input(...))` in a `try-except` block catches the `ValueError` that occurs when the user enters a non-integer string. This allows the program to handle the error gracefully (e.g., by printing a message and continuing the loop) instead of crashing. The other options do not prevent the crash when `int()` receives invalid input.
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.
Use a while True loop with break
Why it's wrong here
Does not handle non-integer input.
Change the data type of guess to string
Why it's wrong here
Then comparison guess != secret would always be True, infinite loop.
Use a try-except around the input conversion
Why this is correct
Catches ValueError and allows reprompt.
Related concept
Read the scenario before looking for a memorised answer.
Add an if statement to check if input is digit
Why it's wrong here
String.isdigit() returns False for negative numbers and floats, still crashes.
Common exam traps
Python Institute often tests the distinction between input validation (like `isdigit()`) and exception handling (`try-except`), where candidates mistakenly believe checking for digits is sufficient, ignoring that `int()` can still fail on valid-looking strings like '-5' or ' 10'.
Detailed technical explanation
The `int()` function raises a `ValueError` for any string that does not represent a valid integer literal (e.g., 'abc', '12.5', ''). A `try-except` block catches this exception, allowing the program to prompt the user again. In real-world applications, input validation with exception handling is preferred over `isdigit()` because it handles edge cases like leading/trailing whitespace, signs, and different numeric bases (e.g., `int('0xFF', 16)`).
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the PCEP exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Control Flow, Loops, Lists and Logic — study guide chapter
Learn the concepts, then practise the questions
Control Flow, Loops, Lists and Logic practice questions
Targeted practice on this topic area only
All PCEP questions
510 questions across all exam domains
Certified Entry-Level Python Programmer PCEP study guide
Full concept coverage aligned to exam objectives
PCEP practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise PCEP questions linked to Computer Programming and Python Fundamentals.
Practise PCEP questions linked to Data Types, Variables, Basic I/O and Operators.
Practise PCEP questions linked to Control Flow, Loops, Lists and Logic.
Practise PCEP questions linked to Functions, Tuples, Dictionaries and Exceptions.
Practise PCEP questions linked to PCEP fundamentals.
Practise PCEP questions linked to PCEP scenario.
Practise PCEP questions linked to PCEP troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Control Flow, Loops, Lists and Logic — This question tests Control Flow, Loops, Lists and Logic — Read the scenario before looking for a memorised answer..
The correct answer is: Use a try-except around the input conversion — Option C is correct because wrapping the `int(input(...))` in a `try-except` block catches the `ValueError` that occurs when the user enters a non-integer string. This allows the program to handle the error gracefully (e.g., by printing a message and continuing the loop) instead of crashing. The other options do not prevent the crash when `int()` receives invalid input.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 30, 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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.