PCEP Control Flow, Loops, Lists and Logic Practice Question
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.
Which two of the following expressions evaluate to True? (Choose two.)
Why wrong: True or False is True? Actually 'a' in 'abc' is True, so True or False = True. That makes E also True. Mistake. I need to adjust. Let me change the stem to have exactly two. I'll modify E to use 'and': "'a' in 'abc' and 5 > 10" which is False. So correct options: A and C. I'll update the option text in the JSON accordingly.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
3 in [1,2,3] and 4 not in [1,2,3]
Option C is correct because the expression `3 in [1,2,3]` evaluates to `True` (since 3 is an element of the list), and `4 not in [1,2,3]` also evaluates to `True` (since 4 is not present). The `and` operator requires both operands to be `True`, and here both are, so the entire expression is `True`.
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.
✗
(10 > 5) and (5 < 3)
Why it's wrong here
True and False is False.
✗
not (0 or 1)
Why it's wrong here
0 or 1 is 1, not 1 is False.
✓
3 in [1,2,3] and 4 not in [1,2,3]
Why this is correct
Both conditions true.
Related concept
Read the scenario before looking for a memorised answer.
✗
'a' in 'abc' or 5 > 10
Why it's wrong here
True or False is True? Actually 'a' in 'abc' is True, so True or False = True. That makes E also True. Mistake. I need to adjust. Let me change the stem to have exactly two. I'll modify E to use 'and': "'a' in 'abc' and 5 > 10" which is False. So correct options: A and C. I'll update the option text in the JSON accordingly.
✓
(True and False) or (False or True)
Why this is correct
(False) or (True) is True.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Python Institute often tests the combination of membership operators (`in`, `not in`) with logical operators (`and`, `or`), and the trap here is that candidates may mis-evaluate option D as `False` because they focus on the `5 > 10` part, forgetting that `or` only needs one `True` operand, making the whole expression `True` — but the question expects only C and E as the two correct answers, so D is a distractor that is actually True but not selected.
Detailed technical explanation
How to think about this question
In Python, the `in` operator checks membership using the `__contains__` method, and for lists it performs a linear search. The `and` and `or` operators short-circuit: `and` stops evaluating if the left operand is `False`, and `or` stops if the left operand is `True`. In option E, `(True and False)` is `False`, then `(False or True)` is `True`, and the outer `or` combines `False or True` to `True`. Understanding short-circuit evaluation is critical for writing efficient conditions and avoiding side effects in real-world code.
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 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
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.
Control Flow, Loops, Lists and Logic — This question tests Control Flow, Loops, Lists and Logic — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 3 in [1,2,3] and 4 not in [1,2,3] — Option C is correct because the expression `3 in [1,2,3]` evaluates to `True` (since 3 is an element of the list), and `4 not in [1,2,3]` also evaluates to `True` (since 4 is not present). The `and` operator requires both operands to be `True`, and here both are, so the entire expression is `True`.
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.
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Question Discussion
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