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Scaling

5 minutes 5 Questions

Scaling defines an application's ability to maintain seamless execution while handling increased workload or user traffic without compromising performance. With Elastic Beanstalk, users can easily configure automated scaling to optimize resource usage. AWS Elastic Beanstalk provides two scaling opt…

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AWS Certified Solutions Architect - Scaling Example Questions

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Question 1

A company runs a stateless, dynamic website on Amazon EC2 in a single AWS Region. Traffic is uneven with frequent, unpredictable spikes. The site must maintain consistent performance and high availability across multiple Availability Zones without manual intervention. Most content is dynamic and not cacheable at the edge. What is the best solution to meet these requirements?

Correct Answer: Use an Auto Scaling group and an Application Load Balancer.

An Auto Scaling group with an Application Load Balancer provides horizontal scaling and high availability for a dynamic, stateless web application. The ALB distributes requests across instances in multiple Availability Zones, and Auto Scaling adjusts capacity automatically using target tracking or step scaling policies to handle sudden traffic spikes without manual intervention. This ensures consistent performance and resilience. Simply increasing the instance size is vertical scaling and does not address availability or unpredictable spikes. Scheduling a Lambda to add instances is brittle, not responsive to real-time demand, and duplicates capabilities built into Auto Scaling. A single CloudFront distribution can improve latency and offload static content, but by itself it does not scale or ensure availability of the dynamic compute layer.

Question 2

A company's RDS instance is experiencing performance issues during peak times due to the increased number of read requests. What is the best solution to handle the increased read traffic?

Correct Answer: Use RDS Read Replicas.

RDS Read Replicas allow to distribute the read traffic across multiple instances, reducing the load on the primary database and improving performance. The other options do not specifically address the read traffic issue or may introduce additional complexity.

Question 3

An organization is using Agile methodologies for their software development, and they recently started working on a complex product which requires interaction with multiple external APIs. How can they effectively scale their Agile process with this new complexity?

Correct Answer: Establish clear dependencies and integration points between teams

By establishing clear dependencies and integration points between teams, an organization can effectively manage the increased complexity of working with external APIs. It ensures that all teams are aware of which parts of the system depend on each API and can coordinate their work accordingly.

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