Developing on AWS - review 2nd Day

You have been asked to design a serverless chat application. The solution requires bidirectional capability between the client and service. Which type of API should you deploy?

• HTTP API

• Websocket API

• Edge Optimized API

• REST API

You are looking to lower the latency of application connections to your REST API. The requests to your API are originating from Amazon EC2 instances within the same region as where the API is deployed. Which Amazon API Gateway configuration should you choose?

• Create a private API endpoint that is exposed through a VPC endpoint.
• Create a REST API with an Endpoint Type set to Private
• Create a REST API with an Endpoint Type set to Regional
• Create a REST API with an Endpoint Type set to Edge Optimized

What is true about DynamoDB Global Secondary Index (GSI)?

• It has its own provisioned throughput
• The index is located on the same table partition as the items that have a given partition key value
• It can be created only when a table is created
• It cannot be deleted

A client is being throttled when sending 1100 updates per second on different primary keys. The Amazon DynamoDB table is configured with the Read/Write Capacity mode set to Provisioned Mode and the RCU and WCU settings are set to 2000. What could be a solution to this issue?

• Enable DynamoDB Accelerator and send the traffic through DAX
• The Read/Write Capacity Mode should be configured with On-Demand
• Increase the amount of WCU for the table
• The maximum throughput per partition has been reached for the partition key so another partition key should be used

After a recent review of your microservice, you have determined that the API Gateway needs to be optimized to improve responsiveness. Your goal is to reduce the number of calls made to your endpoint and to improve the latency of the requests. How can you achieve this?

• Enable API caching on the API Gateway for GET and PUT requests
• Deploy your API Gateway as a Regional gateway
• Enable API caching on the API Gateway
• Deploy your API Gateway as an Edge Optimized gatewa

What is AWS Lambda

• A serverless computing services
• A service that runs code without provsioning or managing servers
• A server-based service
• A service that runs and scales code with high-availability

As a severless service, a Lambda functions located in AWS-managed VPC so it can not interact with RDS database in customer-managed VPC. TRUE or FALSE?

• True
• False

Lambda integrates with EFS. TRUE of FALSE?

• True

• False