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Question 426 of 511

Object-Oriented Programming →hardMultiple ChoiceObjective-mapped

Quick Answer

The correct answer is that the attribute 'age' is not defined in the class or instance, which directly triggers an AttributeError. This error occurs because Python cannot find the requested attribute in the object’s namespace or its class hierarchy—when you try to access an attribute that was never assigned or declared, the interpreter raises this exception to indicate the name does not exist. On the Certified Associate Python Programmer PCAP exam, this concept tests your understanding of object attribute resolution and the difference between instance attributes, class attributes, and methods. A common trap is confusing an undefined attribute with a private attribute (which uses name mangling) or assuming __init__ was not called, but the real issue is simply that the attribute was never created. Remember the memory tip: if you get an AttributeError, ask yourself “Did I assign this attribute anywhere?”—if not, that’s your root cause.

PCAP Object-Oriented Programming Practice Question

This PCAP practice question tests your understanding of object-oriented programming. 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.

Exhibit

class MyClass:
    def __init__(self):
        self.name = "test"
obj = MyClass()
print(obj.age)

Refer to the exhibit. What is the root cause of the error?

Question 1hardmultiple choice

Full question →

Exhibit

class MyClass:
    def __init__(self):
        self.name = "test"
obj = MyClass()
print(obj.age)

A
The attribute 'age' is not defined in the class or instance.
The instance only has 'name', not 'age'.
B
The __init__ method was not called.
Why wrong: __init__ was called implicitly; the instance has 'name'.
C
The attribute 'age' is private.
Why wrong: Private attributes are denoted by double underscore, not by simple name.
D
The attribute 'age' is a class attribute but not initialized.
Why wrong: There is no class attribute named 'age'.

Full breakdown with real-world context →

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

✓

The attribute 'age' is not defined in the class or instance.

Option B is correct because the attribute 'age' is not defined anywhere in the class or instance. Option A is incorrect because there is no private attribute involved. Option C is incorrect because __init__ was called. Option D is incorrect because 'age' is not a class attribute.

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.

✓
The attribute 'age' is not defined in the class or instance.
Why this is correct
The instance only has 'name', not 'age'.
Related concept
Read the scenario before looking for a memorised answer.
✗
The __init__ method was not called.
Why it's wrong here
__init__ was called implicitly; the instance has 'name'.
✗
The attribute 'age' is private.
Why it's wrong here
Private attributes are denoted by double underscore, not by simple name.
✗
The attribute 'age' is a class attribute but not initialized.
Why it's wrong here
There is no class attribute named 'age'.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

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.
Use explanations to understand the rule behind the answer.

TExam Day Tips

Underline the problem statement mentally.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

What to study next

Got this wrong? Here's your next step.

Identify which PCAP exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this PCAP question test?

Object-Oriented Programming — This question tests Object-Oriented Programming — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The attribute 'age' is not defined in the class or instance. — Option B is correct because the attribute 'age' is not defined anywhere in the class or instance. Option A is incorrect because there is no private attribute involved. Option C is incorrect because __init__ was called. Option D is incorrect because 'age' is not a class attribute.

What should I do if I get this PCAP question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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This PCAP 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 PCAP exam.