This PCEP practice question tests your understanding of data types, variables, basic i/o and operators. 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.
Refer to the exhibit.
Code:
age = input('Enter your age: ')
print(age * 2)
Input:
Enter your age: 25What is the output when the user enters 25?
Refer to the exhibit.
Code:
age = input('Enter your age: ')
print(age * 2)
Input:
Enter your age: 25Error
Why wrong: Incorrect. The code runs without error.
2525
Correct. String replication.
25
Why wrong: Incorrect. Multiplication by 2 doubles the string.
50
Why wrong: Incorrect. Would require conversion to int.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
2525
When the user enters 25, the input() function returns the string "25". The print() function then concatenates the string "25" with itself using the + operator, resulting in "2525". This is because the + operator performs string concatenation when both operands are strings, not numeric addition.
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.
Error
Why it's wrong here
Incorrect. The code runs without error.
2525
Why this is correct
Correct. String replication.
Related concept
Read the scenario before looking for a memorised answer.
25
Why it's wrong here
Incorrect. Multiplication by 2 doubles the string.
50
Why it's wrong here
Incorrect. Would require conversion to int.
Common exam traps
Python Institute often tests the distinction between string concatenation and numeric addition, exploiting the fact that input() returns a string, so candidates mistakenly assume the + operator will perform arithmetic.
Detailed technical explanation
In Python, the input() function always returns a string, regardless of what the user types. The + operator is overloaded: it performs arithmetic addition for numeric types and concatenation for strings. This behavior is defined in the Python data model (object.__add__), where the type of the operands determines the operation. In real-world scenarios, this is a common source of bugs when user input is expected to be numeric but is not explicitly converted with int() or float().
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
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..
The correct answer is: 2525 — When the user enters 25, the input() function returns the string "25". The print() function then concatenates the string "25" with itself using the + operator, resulting in "2525". This is because the + operator performs string concatenation when both operands are strings, not numeric addition.
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.
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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.
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