- A
Amazon Comprehend
Comprehend has a PII detection and redaction feature for text.
- B
Amazon Rekognition
Why wrong: Rekognition is for image and video analysis, not audio transcription or PII detection.
- C
Amazon Transcribe
Transcribe converts speech to text from audio recordings.
- D
Amazon Textract
Why wrong: Textract extracts text from documents, not audio.
- E
Amazon Polly
Why wrong: Polly converts text to speech, the opposite direction needed.
Question 199 of 1,000
AIF-C01 AI and ML Fundamentals Practice Question
This AIF-C01 practice question tests your understanding of ai and ml fundamentals. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
A company wants to automatically detect and redact personally identifiable information (PII) from customer support transcripts. Which TWO AWS services can be used together to achieve this? (Choose two.)
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
✓
Amazon Comprehend
Amazon Comprehend is correct because it provides a built-in PII detection and redaction capability via the `DetectPiiEntities` and `ContainsPiiEntities` APIs, which can identify and mask sensitive data such as names, addresses, and credit card numbers in text. Amazon Transcribe is correct because it converts audio customer support calls into text, which is the necessary input format for Comprehend to analyze and redact PII. Together, they form a pipeline: Transcribe generates the transcript, and Comprehend processes it for PII redaction.
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.
- ✓
Amazon Comprehend
Why this is correct
Comprehend has a PII detection and redaction feature for text.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Rekognition
Why it's wrong here
Rekognition is for image and video analysis, not audio transcription or PII detection.
- ✓
Amazon Transcribe
Why this is correct
Transcribe converts speech to text from audio recordings.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Textract
Why it's wrong here
Textract extracts text from documents, not audio.
- ✗
Amazon Polly
Why it's wrong here
Polly converts text to speech, the opposite direction needed.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Amazon Rekognition (image/video analysis) or Amazon Textract (document OCR) with text-based PII detection, forgetting that the input source is audio transcripts, not images or scanned documents.
Detailed technical explanation
How to think about this question
Under the hood, Amazon Comprehend uses a deep learning model trained on a large corpus of labeled PII data to classify entities into categories like NAME, CREDIT_DEBIT_NUMBER, and PHONE. The `DetectPiiEntities` API returns bounding box offsets in the text, allowing precise redaction by replacing characters with asterisks or masking. In a real-world scenario, a company might use Amazon Transcribe's streaming API to process live calls and then feed the output to Comprehend's batch job for compliance with regulations like GDPR or HIPAA.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this AIF-C01 question test?
AI and ML Fundamentals — This question tests AI and ML Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon Comprehend — Amazon Comprehend is correct because it provides a built-in PII detection and redaction capability via the `DetectPiiEntities` and `ContainsPiiEntities` APIs, which can identify and mask sensitive data such as names, addresses, and credit card numbers in text. Amazon Transcribe is correct because it converts audio customer support calls into text, which is the necessary input format for Comprehend to analyze and redact PII. Together, they form a pipeline: Transcribe generates the transcript, and Comprehend processes it for PII redaction.
What should I do if I get this AIF-C01 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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Last reviewed: Jul 4, 2026
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