CLF-C02 Cloud Technology and Services Practice Test 14 — 15 Questions

Question 1

A retail company wants to implement a recommendation engine based on customer purchase history. Which AWS service is designed to provide ML-based personalized recommendations with no ML experience required?

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

Accepted Answer

Amazon Personalize. Amazon Personalize is a fully managed AWS service that enables developers to build applications with real-time personalized recommendations without requiring any prior machine learning experience. It uses the same technology that powers Amazon.com's recommendation engine, processing customer purchase history to deliver tailored product suggestions.

Answer

Amazon SageMaker

Answer

Amazon Comprehend

Answer

Amazon Rekognition

Question 2

Which AWS service provides managed Elasticsearch (OpenSearch) clusters for log analytics and full-text search?

Accepted Answer

Amazon OpenSearch Service. Amazon OpenSearch Service (successor to Amazon Elasticsearch Service) is the correct choice because it provides managed clusters for Elasticsearch and OpenSearch, enabling log analytics, full-text search, and real-time application monitoring. It integrates with Logstash and Kibana (the ELK stack) and supports the OpenSearch API, making it the direct AWS offering for this use case.

Answer

Amazon CloudSearch

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Amazon Athena

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Amazon Redshift

Question 3

A company needs to transfer petabytes of data from an on-premises data center to Amazon S3. The network connection is too slow for online transfer and the data must arrive within two weeks. Which AWS service is most appropriate?

Accepted Answer

AWS Snowball Edge. AWS Snowball Edge is the most appropriate service because it provides physical storage devices that can be shipped to the on-premises data center, allowing petabyte-scale data to be loaded locally and shipped back to AWS, bypassing slow network connections entirely. This meets the two-week deadline since network transfer would be infeasible at that scale over a slow link.

Answer

AWS DataSync

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AWS Direct Connect

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Amazon S3 Transfer Acceleration

Question 4

Which AWS service allows you to build, train, and deploy machine learning models at scale?

Accepted Answer

Amazon SageMaker. Amazon SageMaker is the correct answer because it is a fully managed service that provides every component needed for the machine learning lifecycle, including building, training, and deploying models at scale. It offers integrated Jupyter notebooks for development, built-in algorithms, automatic model tuning, and one-click deployment to a production endpoint with auto-scaling. This makes it the single AWS service designed specifically for end-to-end ML workflows, unlike the other options which serve narrower AI/ML functions.

Answer

Amazon Rekognition

Answer

Amazon Comprehend

Answer

AWS DeepLens

Question 5

Which AWS service provides a managed graph database for use cases like social networks, recommendation engines, and fraud detection?

Accepted Answer

Amazon Neptune. Amazon Neptune is a fully managed graph database service optimized for storing and querying highly connected datasets. It supports both property graph (using Apache TinkerPop Gremlin) and RDF (using SPARQL) models, making it ideal for use cases like social networks, recommendation engines, and fraud detection that require traversing complex relationships.

Answer

Amazon DynamoDB

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Amazon RDS

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Amazon Redshift

Question 6

A company wants to use machine learning to automatically identify objects, scenes, and activities in images uploaded by users. Which AWS service should they use?

Accepted Answer

Amazon Rekognition. Amazon Rekognition is the correct service because it is specifically designed to analyze images and videos to identify objects, scenes, activities, faces, and text. It provides pre-trained machine learning models that can automatically detect these elements without requiring custom model training, making it ideal for the use case described.

Answer

Amazon Textract

Answer

Amazon SageMaker

Answer

Amazon Comprehend

Question 7

Which AWS service enables developers to add user sign-up, sign-in, and access control to web and mobile applications quickly?

Accepted Answer

Amazon Cognito. Amazon Cognito is the correct AWS service for adding user sign-up, sign-in, and access control to web and mobile applications. It provides identity pools and user pools that handle authentication, authorization, and user management, including social identity providers (e.g., Google, Facebook) and enterprise federation via SAML 2.0 or OIDC. This allows developers to quickly integrate these features without building custom backend infrastructure.

Answer

AWS Directory Service

Answer

AWS IAM Identity Center

Answer

AWS IAM

Question 8

Which AWS service is a fully managed data warehousing service optimized for online analytical processing (OLAP) of large datasets?

Accepted Answer

Amazon Redshift. Amazon Redshift is a fully managed, petabyte-scale data warehouse service designed specifically for online analytical processing (OLAP) of large datasets. It uses columnar storage, massively parallel processing (MPP), and data compression to deliver fast query performance on structured and semi-structured data, making it the correct choice for OLAP workloads.

Answer

Amazon RDS

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Amazon DynamoDB

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Amazon Aurora

Question 9

A company wants to run containerized applications without managing the underlying EC2 instances or clusters. Which AWS service enables this?

Accepted Answer

AWS Fargate. AWS Fargate is a serverless compute engine for containers that allows you to run containerized applications without managing the underlying EC2 instances or clusters. You define your task definitions and Fargate automatically provisions and scales the compute infrastructure, abstracting away the need to handle instance patching, capacity planning, or cluster management.

Answer

Amazon EC2 with Docker installed

Answer

Amazon ECS on EC2

Answer

AWS Lambda

Question 10

Which AWS service provides a managed in-memory caching layer to reduce database load and improve application response times?

Accepted Answer

Amazon ElastiCache. Amazon ElastiCache is the correct answer because it provides a managed in-memory caching service that supports both Redis and Memcached, allowing applications to retrieve data from a fast, in-memory cache instead of querying a slower disk-based database. This reduces database load and improves application response times by serving frequently accessed data directly from the cache.

Answer

Amazon DynamoDB Accelerator (DAX)

Answer

Amazon CloudFront

Answer

AWS Global Accelerator

Question 11

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

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AWS Lambda

Answer

Amazon Rekognition

Question 12

Which AWS service provides a domain name system (DNS) that routes end-user requests to AWS infrastructure and external resources?

Accepted Answer

Amazon Route 53. Amazon Route 53 is a highly available and scalable cloud Domain Name System (DNS) web service. It is designed to route end-user requests to AWS infrastructure (such as EC2 instances, ELBs, and S3 buckets) and to external resources by translating human-readable domain names into IP addresses. This directly matches the question's requirement for a DNS-based routing service.

Answer

AWS Global Accelerator

Answer

Amazon CloudFront

Answer

Elastic Load Balancing

Question 13

A company runs an application with variable workloads. During business hours, they need 10 EC2 instances; overnight they only need 2. Which combination minimizes cost while meeting this requirement?

Accepted Answer

2 Reserved Instances + Auto Scaling with On-Demand for variable demand. It uses 2 Reserved Instances to cover the baseline workload (overnight) at a lower cost, and Auto Scaling with On-Demand Instances to dynamically add capacity during business hours. Reserved Instances provide a significant discount over On-Demand for steady-state usage, while On-Demand instances handle variable demand without upfront commitment, minimizing total cost.

Answer

10 On-Demand Instances running 24/7

Answer

10 Reserved Instances

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10 Spot Instances with Auto Scaling

Question 14

Which AWS service enables you to run relational database workloads with up to 5x the throughput of standard MySQL and 3x the throughput of standard PostgreSQL at a lower price point than commercial databases?

Accepted Answer

Amazon Aurora. Amazon Aurora is a MySQL and PostgreSQL-compatible relational database built for the cloud, offering up to 5x the throughput of standard MySQL and 3x the throughput of standard PostgreSQL. It achieves this performance through a distributed, auto-healing storage subsystem that separates compute from storage, and it is priced lower than commercial databases like Oracle or SQL Server while providing high availability and durability.

Answer

Amazon RDS for MySQL

Answer

Amazon Redshift

Answer

Amazon DynamoDB

Question 15

A company needs to synchronize data in real time between its on-premises Oracle database and an Amazon RDS MySQL instance during a migration. Which AWS service handles ongoing data replication between heterogeneous databases?

Accepted Answer

AWS Database Migration Service (DMS). AWS Database Migration Service (DMS) is the correct choice because it supports ongoing replication (change data capture, CDC) from an on-premises Oracle database to an Amazon RDS MySQL instance, even when the source and target are heterogeneous database engines. DMS uses a replication instance to read the source database's transaction logs and apply changes in near real time to the target, making it ideal for continuous synchronization during a migration.

Answer

AWS DataSync

Answer

AWS Snowball

Answer

Amazon Kinesis Data Streams