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 correct statements 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 ensures the file is closed when the block exits.
Option A is correct because the 'with' statement in Python acts as a context manager that automatically calls the file object's __exit__ method when the block exits, which in turn invokes the file's close() method. This guarantees that the file is properly closed, even if an exception occurs within the block, ensuring deterministic resource cleanup.
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 ensures the file is closed when the block exits.
Why this is correct
Correct: provides automatic cleanup.
Related concept
Read the scenario before looking for a memorised answer.
✗
It can only be used with file objects.
Why it's wrong here
It works with any context manager.
✗
It automatically opens the file without needing open().
Why it's wrong here
open() is still required.
✓
It ensures that resources are released even if an exception is raised.
Why this is correct
Correct: context manager handles exceptions.
Related concept
Read the scenario before looking for a memorised answer.
✗
It prevents any exception from occurring during file operations.
Why it's wrong here
Exceptions can still occur; they are not suppressed.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Python Institute often tests the misconception that the 'with' statement is exclusive to file objects or that it automatically opens files, when in fact it is a general-purpose context manager that requires an already-opened resource and does not suppress exceptions.
Detailed technical explanation
How to think about this question
Under the hood, the 'with' statement calls the __enter__ method on the context manager (which for file objects returns the file handle) and then, upon block exit, calls __exit__ regardless of whether an exception occurred. The __exit__ method in file objects handles cleanup by closing the file descriptor, and if an exception is passed to it (via sys.exc_info()), it can optionally suppress it by returning True, though the default file implementation does not suppress exceptions. This pattern is crucial in real-world scenarios like network I/O or database connections, where failing to release resources can lead to resource leaks or deadlocks.
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 ensures the file is closed when the block exits. — Option A is correct because the 'with' statement in Python acts as a context manager that automatically calls the file object's __exit__ method when the block exits, which in turn invokes the file's close() method. This guarantees that the file is properly closed, even if an exception occurs within the block, ensuring deterministic resource cleanup.
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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