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Difficulty: EasyIdentify design principles of the AWS Cloud

A company is migrating its web application to AWS. To handle unpredictable changes in user demand, the company configures the application to automatically scale its compute resources up and down. Additionally, the company decides to use Amazon DynamoDB, a fully managed database service, instead of installing and maintaining database software on EC2 instances. Which of the following design principles of the AWS Cloud is the company implementing? (Select TWO.)

  1. ElasticityAnswer
  2. Services, not serversAnswer
  3. C
    Tight coupling
  4. D
    Monolithic architecture
  5. E
    Upfront capital expense allocation

Answer

The company is implementing the principles of Elasticity and Services, not servers.
The startup implements elasticity by configuring the application to automatically scale its compute resources in response to real-time demand. It also implements the 'services, not servers' principle by leveraging Amazon DynamoDB, a fully managed service, which eliminates the administrative burden of provisioning and managing virtual servers.

Step-by-Step Solution

1
Analyze the automatic scaling behaviour.
The application automatically scales resources up and down to match demand. This maps directly to the principle of Elasticity.
Elasticity is the ability to acquire resources as you need them and release them when you don't.
2
Analyze the choice of database service.
The company chose a managed database service (Amazon DynamoDB) instead of running the database software on EC2 instances. This maps to the principle of Services, not servers.
Using managed services allows organizations to focus on application development rather than server maintenance.

Key Concept

AWS Cloud Design Principles: Elasticity and Services, not servers
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Identify design principles of the AWS Cloud

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