PCEP Practice Question: Data Types, Variables, Basic I/O and Operators
This PCEP practice question tests your understanding of data types, variables, basic i/o and operators. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
Refer to the exhibit.
Error message:
Traceback (most recent call last):
File "script.py", line 3, in <module>
result = "The answer is " + 42
TypeError: can only concatenate str (not "int") to str
What is the most appropriate fix for the error shown in the exhibit?
Refer to the exhibit.
Error message:
Traceback (most recent call last):
File "script.py", line 3, in <module>
result = "The answer is " + 42
TypeError: can only concatenate str (not "int") to str
A
Either A or C are valid fixes.
Both A and C fix the error correctly.
B
Use the comma syntax: print("The answer is", 42).
Why wrong: Valid fix, but not the only one.
C
Use int("The answer is ") to convert the string to an integer.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Either A or C are valid fixes.
Option A is correct because both B and D are valid fixes for the error shown in the exhibit. The error occurs when trying to concatenate a string with an integer using the + operator, which raises a TypeError in Python. Option B uses the comma syntax to print multiple items, which automatically converts the integer to a string for output, while Option D explicitly converts the integer to a string using str(42), allowing safe concatenation. Option C is invalid because int() cannot convert a non-numeric string like "The answer is " to an integer.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Either A or C are valid fixes.
Why this is correct
Both A and C fix the error correctly.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use the comma syntax: print("The answer is", 42).
Why it's wrong here
Valid fix, but not the only one.
✗
Use int("The answer is ") to convert the string to an integer.
Why it's wrong here
Cannot convert that string to int.
✗
Use str(42) to convert the integer to a string.
Why it's wrong here
Valid fix, but not the only one.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Python Institute often tests the misconception that only one fix is correct, when in reality both the comma syntax and explicit str() conversion are valid solutions, and candidates may overlook the comma syntax as a legitimate alternative.
Detailed technical explanation
How to think about this question
In Python, the + operator is overloaded: for numeric types it performs addition, but for strings it performs concatenation. Mixing types (str + int) raises a TypeError because Python does not implicitly convert types in this context. The print() function with comma syntax internally calls str() on each argument and joins them with a space, making it a safe and common pattern for mixed-type output. Understanding type coercion and the difference between implicit and explicit conversion is essential for avoiding runtime errors in Python.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Data Types, Variables, Basic I/O and Operators — This question tests Data Types, Variables, Basic I/O and Operators — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Either A or C are valid fixes. — Option A is correct because both B and D are valid fixes for the error shown in the exhibit. The error occurs when trying to concatenate a string with an integer using the + operator, which raises a TypeError in Python. Option B uses the comma syntax to print multiple items, which automatically converts the integer to a string for output, while Option D explicitly converts the integer to a string using str(42), allowing safe concatenation. Option C is invalid because int() cannot convert a non-numeric string like "The answer is " to an integer.
What should I do if I get this PCEP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
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 →
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.
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.