- A
Amazon Transcribe
Why wrong: Transcribe converts speech to text — it doesn't perform speaker identity verification.
- B
Amazon Rekognition
Why wrong: Rekognition analyzes images and video for facial recognition — it doesn't process audio for voice-based identity verification.
- C
Amazon Connect Voice ID
Connect Voice ID uses ML to authenticate callers based on their unique voice characteristics, comparing against enrolled voiceprints in real-time during contact center calls.
- D
Amazon Lex
Why wrong: Lex builds conversational chatbot interfaces using speech recognition — it doesn't perform speaker identity verification.
Question 255 of 1,024
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 needs to verify the identity of users who call into their contact center by comparing their voice against a stored voiceprint. Which AWS service provides speaker identification from voice data?
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 Connect Voice ID
Amazon Connect Voice ID is the correct AWS service for real-time speaker identification and verification using voice biometrics. It compares a caller's live voice against a stored voiceprint to authenticate their identity, specifically designed for contact center use cases within Amazon Connect.
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 Transcribe
Why it's wrong here
Transcribe converts speech to text — it doesn't perform speaker identity verification.
- ✗
Amazon Rekognition
Why it's wrong here
Rekognition analyzes images and video for facial recognition — it doesn't process audio for voice-based identity verification.
- ✓
Amazon Connect Voice ID
Why this is correct
Connect Voice ID uses ML to authenticate callers based on their unique voice characteristics, comparing against enrolled voiceprints in real-time during contact center calls.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Lex
Why it's wrong here
Lex builds conversational chatbot interfaces using speech recognition — it doesn't perform speaker identity verification.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse Amazon Transcribe (speech-to-text) with speaker identification, or assume Amazon Rekognition can handle audio, when in fact Rekognition is strictly for visual media (images and video).
Detailed technical explanation
How to think about this question
Amazon Connect Voice ID uses deep learning-based voice biometrics to create a unique voiceprint from a caller's speech, typically requiring a short enrollment utterance. During verification, it computes a similarity score against the stored voiceprint and can return a confidence threshold (e.g., HIGH, MEDIUM, LOW) to the contact center flow. This service is tightly integrated with Amazon Connect streams and can be used for fraud detection or frictionless authentication without requiring the caller to remember PINs or passwords.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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 CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon Connect Voice ID — Amazon Connect Voice ID is the correct AWS service for real-time speaker identification and verification using voice biometrics. It compares a caller's live voice against a stored voiceprint to authenticate their identity, specifically designed for contact center use cases within Amazon Connect.
What should I do if I get this CLF-C02 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 11, 2026
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services 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 CLF-C02 exam.
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