MLS-C01 Exploratory Data Analysis Practice Question
A data scientist is analyzing a dataset containing customer reviews. The data scientist wants to understand the most common words used in positive and negative reviews. Which AWS service is most suitable for this task?
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 can perform sentiment analysis and extract key phrases. Option A is wrong because Amazon Rekognition is for image/video analysis. Option C is wrong because Amazon Polly is a text-to-speech service. Option D is wrong because Amazon Transcribe is for speech-to-text.
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 Rekognition
Why it's wrong here
Rekognition is for image and video analysis, not text.
- ✓
Amazon Comprehend
Why this is correct
Comprehend provides sentiment analysis and key phrase extraction.
- ✗
Amazon Polly
Why it's wrong here
Polly converts text to speech.
- ✗
Amazon Transcribe
Why it's wrong here
Transcribe converts audio to text.
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Written by Johnson Ajibi, MSc IT Security
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