A company runs thousands of simultaneous simul-ations using AWS Batch. Each simul-ation is stateless, is fault tolerant, and runs for up to 3 hours.
Which pricing model enables the company to optimize costs and meet these requirements?
The correct answer is B because Spot Instances enable the company to optimize costs and meet the requirements. Spot Instances are spare EC2 instances that are available at up to 90% discount compared to On-Demand prices. Spot Instances are suitable for stateless, fault-tolerant, and flexible applications that can run for any duration. The other options are incorrect because they do not enable the company to optimize costs and meet the requirements. Reserved Instances are EC2 instances that are reserved for a specific period of time (one or three years) in exchange for a lower hourly rate. Reserved Instances are suitable for steady-state or predictable workloads that run for a long duration. On-Demand Instances are EC2 instances that are launched and billed at a fixed hourly rate. On-Demand Instances are suitable for short-term, irregular, or unpredictable workloads that cannot be interrupted. Dedicated Instances are EC2 instances that run on hardware that is dedicated to a single customer. Dedicated Instances are suitable for workloads that require regulatory compliance or data isolation. Reference: [Amazon EC2 Instance Purchasing Options]
To reduce costs, a company is planning to migrate a NoSQL database to AWS.
Which AWS service is fully managed and can automatically scale throughput capacity to meet database workload demands?
Amazon DynamoDB is a fully managed, serverless, key-value NoSQL database service that can deliver consistent, single-digit millisecond performance at any scale. DynamoDB can automatically scale throughput capacity to meet the demands of the database workload, without requiring any manual intervention. DynamoDB is ideal for NoSQL applications that need high performance, availability, and scalability. DynamoDB also offers features such as encryption at rest, point-in-time recovery, global tables, and in-memory caching.Reference:What is NoSQL?,Amazon DynamoDB, [AWS Cloud Practitioner Essentials: Module 4 - Databases in the Cloud]
A company wants to use an AWS networking solution that can act as a centralized gateway between multiple VPCs and on-premises networks. Which AWS service or feature will meet this requirement?
AWS Transit Gateway serves as a central hub that enables connectivity between multiple VPCs and on-premises networks. It simplifies network architecture and management by acting as a centralized gateway for traffic flowing between all connected networks. Other options, such as Gateway VPC Endpoints and AWS PrivateLink, do not provide the centralized, scalable connectivity that Transit Gateway offers across multiple VPCs and on-premises environments.
A company wants an AWS service to provide product recommendations based on its customer data.
Which AWS service will meet this requirement?
Amazon Personalize is an AWS service that helps developers quickly build and deploy a custom recommendation engine with real-time personalization and user segmentation1. It uses machine learning (ML) to analyze customer data and provide relevant recommendations based on their preferences, behavior, and context.Amazon Personalize can be used for various use cases such as optimizing recommendations, targeting customers more accurately, maximizing the value of unstructured text, and promoting items using business rules1.
The other options are not suitable for providing product recommendations based on customer data. Amazon Polly is a service that converts text into lifelike speech. Amazon Comprehend is a service that uses natural language processing (NLP) toextract insights from text and documents. Amazon Rekognition is a service that uses computer vision (CV) to analyze images and videos for faces, objects, scenes, and activities.
:
1: Cloud Products - Amazon Web Services (AWS)
2: Recommender System -- Amazon Personalize -- Amazon Web Services
3: Top 25 AWS Services List 2023 - GeeksforGeeks
4: AWS to Azure services comparison - Azure Architecture Center
5: The 25+ Best AWS Cost Optimization Tools (Updated 2023) - CloudZero
6: Amazon Polly -- Text-to-Speech Service - AWS
7: Natural Language Processing - Amazon Comprehend - AWS
8: Image and Video Analysis - Amazon Rekognition - AWS
A company wants to test a new application.
Which AWS principle will help the company test the application?
AWS provides the flexibility to scale resources up or down on demand, enabling companies to test new applications without making long-term commitments. This principle allows for cost efficiency and agility during testing and development. The other options do not specifically highlight the benefits of flexible, on-demand resource scaling.
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