Quick Answer
The correct choice is `raise ValueError('new') from original_exception` because this syntax explicitly chains the new exception to the original one, preserving the full traceback of the root cause. In Python, the `raise ... from` mechanism creates an implicit `__cause__` attribute on the new exception, so when the error is displayed, both the new `ValueError` and the original exception’s traceback are shown, making debugging far more effective. On the Certified Associate Python Programmer PCAP exam, this concept tests your understanding of exception chaining and how to avoid losing critical debugging information when re-raising errors. A common trap is using a bare `raise` or `raise NewException` without `from`, which either re-raises the same exception or discards the original traceback entirely. Remember the mnemonic: “from the source” — always chain back to the original error to keep your debugging trail intact.
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 of the following correctly raises a new exception while preserving the original traceback?
raise original_exception
Why wrong: Re-raises original, does not raise new.
raise ValueError('new')
Why wrong: Raises new without chaining.
raise ValueError('new') from original_exception
Correct chaining syntax.
raise
Why wrong: Re-raises the current exception only.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
raise ValueError('new') from original_exception
Option C is correct because the `raise ... from original_exception` syntax in Python allows you to raise a new exception while chaining it to the original exception, preserving the original traceback. This is essential for debugging, as it shows both the new error and the root cause.
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.
raise original_exception
Why it's wrong here
Re-raises original, does not raise new.
raise ValueError('new')
Why it's wrong here
Raises new without chaining.
raise ValueError('new') from original_exception
Why this is correct
Correct chaining syntax.
Related concept
Read the scenario before looking for a memorised answer.
raise
Why it's wrong here
Re-raises the current exception only.
Common exam traps
Python Institute often tests the distinction between re-raising the same exception (bare `raise` or `raise original_exception`) and raising a new exception with chaining (`raise ... from original_exception`), trapping candidates who think any `raise` preserves the traceback.
Detailed technical explanation
Under the hood, Python's exception chaining uses the `__cause__` attribute on the exception object, which is set by the `from` clause. When an exception is chained, the traceback includes both the new exception and the original, which is critical in complex applications like network servers where a low-level socket error might be wrapped in a higher-level application error. The `raise ... from None` idiom can suppress the chain when desired.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Exceptions and File I/O — This question tests Exceptions and File I/O — Read the scenario before looking for a memorised answer..
The correct answer is: raise ValueError('new') from original_exception — Option C is correct because the `raise ... from original_exception` syntax in Python allows you to raise a new exception while chaining it to the original exception, preserving the original traceback. This is essential for debugging, as it shows both the new error and the root cause.
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 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.
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