CLF-C02 Cloud Technology and Services Practice Test 19 — 15 Questions

Question 1

Which AWS service enables automatic speech recognition (ASR) to convert audio from customer service calls into text for further analysis?

Accepted Answer

Amazon Transcribe. Amazon Transcribe is the correct AWS service for automatic speech recognition (ASR) because it is specifically designed to convert audio speech into text. It uses deep learning-based ASR models to process audio files or real-time streams, making it ideal for transcribing customer service call recordings for downstream analysis.

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Amazon Polly

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Amazon Lex

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Amazon Comprehend

Question 2

A company wants to provide a virtual contact center for their customer service operations without managing any telephony infrastructure. Which AWS service enables this?

Accepted Answer

Amazon Connect. Amazon Connect is a cloud-based contact center service that enables organizations to set up a virtual contact center without managing any underlying telephony infrastructure. It provides built-in telephony, IVR, and agent management, allowing customer service operations to scale on demand without the need for physical PBX or SIP trunking.

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Amazon Chime SDK

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Amazon Pinpoint

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Amazon SES

Question 3

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.

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Amazon CloudWatch

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AWS CloudTrail

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AWS Config

Question 4

A retail company expects 10x normal traffic during Black Friday. They want to ensure their application can handle this peak load automatically. Which AWS services should they configure to handle this requirement?

Accepted Answer

EC2 Auto Scaling + Application Load Balancer with CloudWatch scaling policies. EC2 Auto Scaling automatically adjusts the number of EC2 instances based on demand, and an Application Load Balancer distributes incoming traffic across those instances. CloudWatch scaling policies monitor metrics like CPU utilization or request count to trigger scaling actions, ensuring the application can handle the 10x traffic spike without manual intervention.

Answer

Launch the maximum number of instances before Black Friday and keep them running year-round

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Increase the EC2 instance size to the largest available type

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Use AWS Snowball to temporarily add compute capacity

Question 5

Which AWS storage type provides the lowest latency storage for a single EC2 instance, with data stored on NVMe SSDs physically attached to the host computer?

Accepted Answer

EC2 Instance Store. EC2 Instance Store provides temporary block-level storage for an EC2 instance, with data stored on NVMe SSDs that are physically attached to the host computer. This direct attachment eliminates network latency, offering the lowest possible latency for a single EC2 instance compared to any network-attached storage option.

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Amazon EBS (Elastic Block Store)

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Amazon EFS (Elastic File System)

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Amazon S3

Question 6

A company wants to use Amazon S3 to store objects that must not be deleted or overwritten for a specified period for regulatory compliance. Which S3 feature enforces this?

Accepted Answer

S3 Object Lock. Amazon S3 Object Lock is designed specifically to prevent objects from being deleted or overwritten for a fixed period or indefinitely. It enforces a write-once-read-many (WORM) model by applying retention modes (Governance or Compliance) or legal holds, which block both DELETE and PUT operations on locked objects until the retention period expires. This directly meets the regulatory compliance requirement described in the question.

Answer

S3 Versioning

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S3 Lifecycle policies

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S3 Block Public Access

Question 7

A company uses Amazon CloudFront to serve their website globally. They want to ensure that users in China can also access the website with low latency. What infrastructure consideration is required?

Accepted Answer

Use AWS China Regions (cn-north-1, cn-northwest-1) which require a separate AWS account. Serving content to users in China with low latency via CloudFront requires using AWS China Regions (cn-north-1, cn-northwest-1), which are isolated from global AWS Regions and require a separate AWS account due to Chinese regulatory and legal requirements. CloudFront distributions cannot directly serve content from global edge locations to users in China with optimal performance; instead, you must set up a separate CloudFront distribution in a China Region or use third-party CDN integration.

Answer

Enable CloudFront Geo-targeting for the China region

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Enable CloudFront Accelerated Transfer for China

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Use Route 53 latency routing to direct Chinese users to the nearest CloudFront PoP

Question 8

A company wants to automate the creation and management of machine learning models without writing code. Which AWS service provides a no-code ML model building interface?

Accepted Answer

Amazon SageMaker Canvas. Amazon SageMaker Canvas is a no-code ML service that provides a visual, drag-and-drop interface for building and managing machine learning models without writing any code. It is designed for business analysts and domain experts who need to generate predictions from their data without programming expertise.

Answer

Amazon SageMaker Studio

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Amazon SageMaker Autopilot

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Amazon Rekognition Custom Labels

Question 9

Which AWS service enables sending promotional and transactional email at scale, such as marketing newsletters and order confirmations?

Accepted Answer

Amazon SES. Amazon SES (Simple Email Service) is specifically designed for sending high-volume transactional and marketing emails, such as order confirmations and newsletters. It provides dedicated SMTP endpoints and APIs for email delivery, with features like bounce handling, suppression lists, and deliverability tracking. This makes it the correct choice for scalable email sending at scale.

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Amazon SNS

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Amazon Pinpoint

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Amazon Cognito

Question 10

A company needs to synchronize files between their on-premises file server and Amazon S3 on a recurring schedule, detecting and copying only the changed files. Which AWS service is designed for this use case?

Accepted Answer

AWS DataSync. AWS DataSync is purpose-built for automating and accelerating the transfer of data between on-premises storage systems and AWS storage services, including Amazon S3. It supports incremental, scheduled transfers that detect and copy only changed files, making it the ideal choice for recurring file synchronization with S3.

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AWS Snowball

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Amazon S3 Transfer Acceleration

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AWS Storage Gateway

Question 11

Which AWS service provides a hybrid cloud storage solution that allows on-premises applications to seamlessly access data stored in AWS cloud storage using standard file protocols?

Accepted Answer

AWS Storage Gateway. AWS Storage Gateway provides a hybrid cloud storage solution by offering on-premises appliances that expose standard file protocols (NFS, SMB) to local applications, while storing data durably in Amazon S3 or Amazon EBS. This allows seamless access to AWS cloud storage without modifying existing workflows, as the gateway caches frequently accessed data locally and asynchronously transfers data to the cloud.

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AWS DataSync

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AWS Direct Connect

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Amazon FSx

Question 12

A company needs to generate a pre-signed URL to allow a business partner to download a specific S3 object for 24 hours without requiring AWS credentials. Which S3 feature enables this?

Accepted Answer

S3 Pre-signed URLs. Pre-signed URLs grant temporary access to a specific S3 object by embedding credentials in a URL signed with the bucket owner's AWS signature. The URL is valid for a specified duration (up to 7 days, here 24 hours) and allows the partner to download the object without having AWS credentials. This is the only S3 feature that provides time-limited, object-specific access without requiring the partner to authenticate with AWS.

Answer

S3 Bucket Policy with IP-based restrictions

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S3 Access Points

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S3 Bucket public-read ACL

Question 13

A company processes millions of customer records and needs to query data in Amazon S3 without loading it into a database. The data is stored in Parquet format. Which AWS service enables this with no infrastructure to manage?

Accepted Answer

Amazon Athena. Amazon Athena is a serverless interactive query service that allows you to analyze data directly in Amazon S3 using standard SQL, with no infrastructure to manage. It natively supports Parquet format, which is columnar and optimized for efficient querying, making it ideal for querying millions of customer records without loading them into a database.

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Amazon Redshift Spectrum

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Amazon EMR

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AWS Glue ETL

Question 14

A company needs to generate detailed AWS billing reports segmented by department. Each department uses distinct AWS accounts under an AWS Organization. Which two mechanisms work together to provide department-level cost allocation?

Accepted Answer

AWS Organizations consolidated billing + Cost Explorer grouped by linked account. AWS Organizations consolidated billing rolls up costs from all linked accounts into a single payer account, and Cost Explorer can group costs by linked account ID, enabling department-level cost allocation when each department uses a distinct account. Option C is incorrect because AWS Pricing Calculator is only for pre-deployment cost estimation, not for generating actual billing reports from usage data; the Cost and Usage Report provides detailed billing data but cannot alone provide department-level allocation without being combined with account grouping, which is already covered by Option B.

Answer

AWS Budgets + CloudWatch Billing Alarms

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AWS Pricing Calculator + Cost and Usage Report

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AWS Config + AWS Trusted Advisor

Question 15

Which AWS service makes it easy for developers to create, publish, and manage APIs that act as the front door for applications to access backend services?

Accepted Answer

Amazon API Gateway. Amazon API Gateway is a fully managed service that enables developers to create, publish, maintain, monitor, and secure APIs at any scale. It acts as a front door for applications to access backend services such as AWS Lambda, Amazon EC2, or any publicly accessible web endpoint, handling all the tasks involved in accepting and processing up to hundreds of thousands of concurrent API calls.

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Amazon CloudFront

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Elastic Load Balancing

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AWS App Runner