AWS DevOps Engineer Professional Practice Test

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Enhance your AWS skills with our AWS DevOps Engineer Professional Test. Ace your certification with multiple choice questions, detailed explanations, and comprehensive study guides. Prepare effectively and conquer the exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Which AWS service helps applications automatically scale in and out based on demand?

AWS Elastic Load Balancing
AWS Auto Scaling
AWS CloudFormation
AWS Step Functions

The correct answer is: AWS Auto Scaling

AWS Auto Scaling is specifically designed to help applications automatically scale in and out based on demand. This service monitors your application's performance and adjusts the number of instances running based on real-time performance metrics and defined scaling policies. It ensures optimal performance and cost-effectiveness by automatically increasing the number of instances during peak usage times and decreasing them during low demand periods. In contrast, AWS Elastic Load Balancing helps distribute incoming application traffic across multiple targets, such as Amazon EC2 instances, but it does not directly scale these instances. AWS CloudFormation is a service used to define and provision AWS infrastructure as code, but it does not have built-in auto-scaling capabilities. AWS Step Functions enables you to coordinate multiple AWS services into serverless workflows, facilitating the building of complex applications, but it also does not handle scaling based on demand. Thus, AWS Auto Scaling is the clear choice for automatically managing the scaling of application resources.