Dynamo DB

Before you create a DynamoDB table, you need to provision the EC2 instance the DynamoDB table will be running on

• True

• False

You have provisioned a DynamoDB table with 10 RCUs and 10 WCUs. A month later you want to increase the RCU to handle more read traffic. What should you do?

• Increase RCU and keep WCU the same

• You need to increase both RCU and WCU

• Increase RCU and decrease WCU

You have an e-commerce website where you are using DynamoDB as your database. You are about to enter the Christmas sale and you have a few items which are very popular and you expect that they will be read often. Unfortunately, last year due to the huge traffic you had the ProvisionedThroughputExceededException exception. What would you do to prevent this error from happening again?

• Increase the RCU to a very high value

• Create a DAX Cluster

• Migrate the database away from DynamoDB for the time of the sale

You have developed a mobile application that uses DynamoDB as its datastore. You want to automate sending welcome emails to new users after they sign up. What is the most efficient way to achieve this?

• Schedule a Lambda function to run every min using CloudWatch Events, scan the entire table looking for new users

• Enable SNS and DynamoDB integration

• Enable Dynamo Streams and configure it to invoke a Lambda function to send emails

A weather forecast agency collects key weather metrics across multiple cities in the US and sends this data in the form of key-value pairs to AWS Cloud at a one-minute frequency.

As a solutions architect, which of the following AWS services would you use to build a solution for processing and then reliably storing this data with high availability? (Select two)

• DynamoDB

• RDS

• Redshift

• ElastiCache

• Lambda

A small business has been running its IT systems on the on-premises infrastructure but the business now plans to migrate to AWS Cloud for operational efficiencies.

As a Solutions Architect, can you suggest a cost-effective serverless solution for its flagship application that has both static and dynamic content?

• Host the static content on Amazon S3 and use Lambda with DynamoDB for the serverless web application that handles dynamic content. Amazon CloudFront will sit in front of Lambda for distribution across diverse regions

• Host both the static and dynamic content of the web application on Amazon S3 and use Amazon CloudFront for distribution across diverse regions/countries

• Host the static content on Amazon S3 and use Amazon EC2 with RDS for generating the dynamic content. Amazon CloudFront can be configured in front of EC2 instance, to make global distribution easy

• Host both the static and dynamic content of the web application on Amazon EC2 with RDS as the database. Amazon CloudFront should be configured to distribute the content across geographically disperse regions