This PCAP practice question tests your understanding of exceptions and file i/o. 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 are true about the 'with' statement in Python file I/O?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It is equivalent to a try/finally block
Option B is correct because the 'with' statement in Python is designed to simplify exception handling by encapsulating the setup and teardown of a resource in a context manager, which is functionally equivalent to a try/finally block. When you use 'with', the context manager's __exit__ method is guaranteed to be called even if an exception occurs, ensuring that cleanup actions like closing a file are performed, just as a finally clause would.
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.
✗
It can only be used with file objects
Why it's wrong here
Any object implementing the context manager protocol works.
✓
It is equivalent to a try/finally block
Why this is correct
The 'with' statement ensures cleanup just like try/finally.
Related concept
Read the scenario before looking for a memorised answer.
✓
It automatically closes the file after the block
Why this is correct
The __exit__ method is called automatically, closing the file.
Related concept
Read the scenario before looking for a memorised answer.
✗
It does not require an __exit__ method
Why it's wrong here
The __exit__ method is essential for cleanup.
✗
It requires the object to have an __enter__ method only
Why it's wrong here
Both __enter__ and __exit__ are required.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Python Institute often tests the misconception that the 'with' statement is only for file I/O, but the trap here is that candidates forget the context manager protocol requires both __enter__ and __exit__ methods, not just one, and that it applies to any object implementing that protocol.
Detailed technical explanation
How to think about this question
Under the hood, the 'with' statement calls the __enter__ method of the context manager, assigns its return value to the target variable (if any), and then executes the block. When the block exits (normally or via exception), it calls the __exit__ method, which receives exception type, value, and traceback; if __exit__ returns True, the exception is suppressed. A subtle behavior is that if __exit__ returns False (or None), any exception raised in the block propagates, making it crucial for resource management in scenarios like network connections where partial writes must be handled.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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.
Exceptions and File I/O — This question tests Exceptions and File I/O — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It is equivalent to a try/finally block — Option B is correct because the 'with' statement in Python is designed to simplify exception handling by encapsulating the setup and teardown of a resource in a context manager, which is functionally equivalent to a try/finally block. When you use 'with', the context manager's __exit__ method is guaranteed to be called even if an exception occurs, ensuring that cleanup actions like closing a file are performed, just as a finally clause would.
What should I do if I get this PCAP 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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