AWS Certified Solutions Architect – Associate (SAA-C02) — Question 592

A payment processing company records all voice communication with its customers and stores the audio files in an Amazon S3 bucket. The company needs to capture the text from the audio files. The company must remove from the text any personally identifiable information (PII) that belongs to customers.
What should a solutions architect do to meet these requirements?

Answer options

• A. Process the audio files by using Amazon Kinesis Video Streams. Use an AWS Lambda function to scan for known PII patterns.
• B. When an audio file is uploaded to the S3 bucket, invoke an AWS Lambda function to start an Amazon Textract task to analyze the call recordings.
• C. Configure an Amazon Transcribe transcription job with PII redaction turned on. When an audio file is uploaded to the S3 bucket, invoke an AWS Lambda function to start the transcription job. Store the output in a separate S3 bucket.
• D. Create an Amazon Connect contact flow that ingests the audio files with transcription turned on. Embed an AWS Lambda function to scan for known PII patterns. Use Amazon EventBridge (Amazon CloudWatch Events) to start the contact flow when an audio file is uploaded to the S3 bucket.

Correct answer: C

Explanation

Amazon Transcribe is the native AWS service for converting speech to text and features a built-in PII redaction capability that automatically identifies and masks sensitive customer data. Triggering this transcription via an AWS Lambda function when a new file is uploaded to Amazon S3 provides an automated, serverless workflow. Other services like Amazon Textract are designed for document text extraction rather than audio, and manually scanning for PII via custom Lambda functions adds unnecessary complexity.