AWS (Amazon Web Services) Certification Practice Exam

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Prepare for your AWS Certification Exam with flashcards and multiple-choice questions. Each question comes with hints and detailed explanations to help you succeed. Enhance your skills and be ready for the exam!

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Which AWS service is ideal for applications that scale across multiple instances while maintaining low latency response?

Amazon S3
Elastic File System
AWS Lambda
AWS CloudFormation

The correct answer is: Elastic File System

The ideal AWS service for applications that scale across multiple instances while maintaining low latency response is AWS Lambda. This service allows you to run code in response to events without provisioning or managing servers, which is particularly useful for applications that need to scale automatically based on demand. AWS Lambda can handle multiple concurrent executions, and because it operates in a serverless architecture, it can deliver very low-latency responses, especially for event-driven applications. While Amazon S3 is optimized for storage and data accessibility and Elastic File System (EFS) provides scalable file storage, neither of these services inherently offers the low-latency compute capabilities that AWS Lambda does. AWS CloudFormation, on the other hand, is a service used for infrastructure as code to automate and manage your AWS resources and does not have a direct role in application execution or performance. Thus, AWS Lambda stands out as the most effective choice for building scalable applications that require fast and responsive processing, making it the correct answer for this scenario.