CLF-C02 Practice Test 42 — 15 Questions

Question 1

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?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

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.

Answer

Amazon Transcribe

Answer

Amazon Rekognition

Answer

Amazon Lex

Question 2

Which AWS service provides a serverless, fully managed Apache Kafka-compatible data streaming service?

Accepted Answer

Amazon MSK (Managed Streaming for Apache Kafka). Amazon MSK (Managed Streaming for Apache Kafka) is the correct answer because it is a fully managed, serverless service that provides Apache Kafka-compatible data streaming. It handles cluster provisioning, scaling, and maintenance, allowing you to run Kafka workloads without managing infrastructure. This directly matches the question's requirement for a serverless, fully managed Apache Kafka-compatible service.

Answer

Amazon SQS

Answer

Amazon Kinesis Data Streams

Answer

AWS Step Functions

Question 3

What is the purpose of AWS Shield Standard?

Accepted Answer

To protect AWS resources against common DDoS attacks. AWS Shield Standard is a free, always-on service that protects all AWS customers from common, infrastructure-layer Distributed Denial of Service (DDoS) attacks, such as SYN floods, UDP floods, and reflection attacks. It uses network flow monitoring and inline mitigation techniques at the AWS edge to automatically detect and block malicious traffic targeting AWS resources like EC2, ELB, CloudFront, and Route 53. This makes option B correct because its sole purpose is to provide baseline DDoS protection without any additional configuration or cost.

Answer

To encrypt data at rest in S3 buckets

Answer

To monitor API calls made to AWS services

Answer

To filter malicious web traffic using rules

Question 4

A media company stores video files in Amazon S3 and needs to transcode them into multiple formats for different devices. Which AWS service is purpose-built for this workflow?

Accepted Answer

Amazon Elastic Transcoder. Amazon Elastic Transcoder is a purpose-built media transcoding service that converts video files stored in Amazon S3 into the formats required by various devices. It handles the complexities of transcoding, including format conversion, resolution scaling, and bitrate adjustment, without requiring you to manage underlying infrastructure.

Answer

Amazon Kinesis Video Streams

Answer

AWS Lambda

Answer

Amazon Rekognition

Question 5

Which AWS tool provides recommendations to help reduce costs, improve performance, enhance security, and increase fault tolerance?

Accepted Answer

AWS Trusted Advisor. AWS Trusted Advisor is the correct answer because it provides real-time guidance and recommendations across five categories: cost optimization, performance, security, fault tolerance, and service limits. It evaluates your AWS environment against AWS best practices and generates actionable recommendations to reduce costs, improve performance, enhance security, and increase fault tolerance. This makes it the only tool among the options that covers all four areas mentioned in the question.

Answer

AWS Cost Explorer

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AWS Budgets

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AWS Compute Optimizer

Question 6

A developer wants to run code in response to an S3 object upload without managing any servers. The code runs for less than 5 minutes. Which AWS service is most appropriate?

Accepted Answer

AWS Lambda. AWS Lambda is the most appropriate service because it is a serverless compute service that automatically runs code in response to events, such as an S3 object upload, without requiring any server management. Lambda supports code execution up to 15 minutes per invocation, which easily accommodates the less-than-5-minute requirement, and it integrates natively with S3 event notifications via the S3 bucket notification configuration.

Answer

Amazon EC2

Answer

AWS Fargate

Answer

Amazon ECS

Question 7

A company needs to convert text documents into natural-sounding speech in multiple languages for an audiobook application. Which AWS service provides this capability?

Accepted Answer

Amazon Polly. Amazon Polly is a managed service that turns text into lifelike speech using deep learning technologies, supporting multiple languages and voices. It is specifically designed for text-to-speech (TTS) conversion, making it the correct choice for generating natural-sounding audio for an audiobook application.

Answer

Amazon Transcribe

Answer

Amazon Translate

Answer

Amazon Lex

Question 8

Which tool allows a company to estimate the monthly cost of running a new AWS architecture before deploying any resources?

Accepted Answer

AWS Pricing Calculator. The AWS Pricing Calculator (formerly Simple Monthly Calculator) allows users to estimate the monthly cost of AWS services by configuring resources like EC2 instances, storage, and data transfer before deployment. It provides a detailed cost breakdown based on selected regions, instance types, and usage patterns, enabling informed budgeting without incurring actual charges.

Answer

AWS Cost Explorer

Answer

AWS Budgets

Answer

AWS Trusted Advisor

Question 9

A company needs a relational database that automatically scales storage, replicates data across multiple AZs, and can failover automatically without manual intervention. Which AWS service provides these capabilities?

Accepted Answer

Amazon RDS with Multi-AZ deployment. Amazon RDS with Multi-AZ deployment automatically provisions and maintains a synchronous standby replica in a different Availability Zone. This setup provides automatic failover to the standby without manual intervention, and storage scaling can be handled via Amazon EBS or Aurora storage auto-scaling, meeting all stated requirements.

Answer

Amazon DynamoDB

Answer

Amazon Redshift

Answer

Amazon ElastiCache for Redis

Question 10

A developer wants to build a serverless application that responds to HTTP requests. Which combination of AWS services would be most appropriate?

Accepted Answer

Amazon API Gateway and AWS Lambda. Amazon API Gateway acts as a fully managed HTTP endpoint that receives and routes incoming requests to AWS Lambda functions, which execute the application logic without provisioning servers. This combination directly fulfills the requirement for a serverless application that responds to HTTP requests, as Lambda handles compute in a stateless, event-driven manner and API Gateway provides the HTTP interface with built-in features like throttling, authentication, and request validation.

Answer

Amazon EC2 and Elastic Load Balancing

Answer

Amazon ECS and AWS Fargate

Answer

AWS Elastic Beanstalk and Amazon RDS

Question 11

Which Amazon EC2 instance type provides the best performance for a relational database that requires very high IOPS with consistent sub-millisecond storage latency?

Accepted Answer

Storage-optimized instances (I family). The I family (Storage-optimized instances) is designed for high-frequency, low-latency I/O operations, leveraging NVMe SSD-backed instance storage to deliver very high IOPS and consistent sub-millisecond latency, making it ideal for relational databases with demanding storage performance requirements.

Answer

General purpose instances (M family)

Answer

Compute-optimized instances (C family)

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Memory-optimized instances (R family)

Question 12

A company operates a critical e-commerce platform on AWS that generates significant revenue. The management team requires a dedicated Technical Account Manager (TAM) to provide proactive guidance and operational best practices. Additionally, they need the fastest possible response time for critical system failures, targeting a response within 15 minutes. Which AWS Support plan should the company choose?

Accepted Answer

Enterprise Support. The company requires a dedicated Technical Account Manager (TAM) and the fastest possible response time for critical system failures (15-minute response). Only the Enterprise Support plan includes a designated TAM and provides a 15-minute response time for business-critical system failures. The Enterprise On-Ramp Support plan offers a TAM but has a longer 30-minute response time for critical cases, and the Business Support plan does not include a TAM at all.

Answer

Basic Support

Answer

Business Support

Answer

Enterprise On-Ramp Support

Question 13

A company recently migrated to AWS and needs to ensure their S3 buckets are not publicly accessible. Which combination of controls best prevents accidental public S3 exposure?

Accepted Answer

Enable S3 Block Public Access at the account level and use AWS Config to detect violations. S3 Block Public Access at the account level provides a centralized, enforceable guardrail that prevents any bucket or object from being made publicly accessible, overriding any bucket-level policies or ACLs. AWS Config can then continuously monitor for configuration violations, such as a bucket policy that grants public access, and trigger remediation or alerts. Together, these controls create a defense-in-depth approach that both prevents accidental exposure and detects non-compliance.

Answer

Enable S3 server-side encryption on all buckets

Answer

Enable S3 versioning on all buckets

Answer

Enable S3 Transfer Acceleration for all buckets

Question 14

A finance team works with architects to eliminate unused EC2 instances, right-size over-provisioned resources, replace On-Demand instances with Reserved Instances for stable workloads, and adopt managed services to reduce operational overhead. Which AWS Well-Architected Framework pillar guides these activities?

Accepted Answer

Cost Optimisation. The Cost Optimization pillar of the AWS Well-Architected Framework focuses on eliminating unused resources, right-sizing over-provisioned instances, using Reserved Instances for predictable workloads, and adopting managed services to reduce operational overhead. These activities directly target cost efficiency by aligning resource usage with demand and avoiding waste.

Answer

Operational Excellence

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Reliability

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Security

Question 15

A company needs to monitor their application's performance and identify bottlenecks by tracing requests as they travel through multiple AWS services and microservices. Which AWS service provides distributed tracing?

Accepted Answer

AWS X-Ray. AWS X-Ray is the correct service because it is specifically designed for distributed tracing, allowing you to trace requests end-to-end as they travel through AWS services and microservices. It provides a service map, traces, and annotations to identify performance bottlenecks and debug errors across distributed applications.

Answer

Amazon CloudWatch

Answer

AWS CloudTrail

Answer

AWS Config