AWS Devops

1.

Your company’s branch offices are all over the world, they use a software with a multi-regional deployment on AWS, they use MySQL 5.6 for data persistence. The task is to run an hourly batch process and read data from every region to compute cross-regional reports which will be distributed to all the branches. This should be done in the shortest time possible. How will you build the DB architecture in order to meet the requirements?

For each regional deployment, use RDS MySQL with a master in the region and a read replica in the HQ region For each regional deployment, use MySQL on EC2 with a master in the region and send hourly EBS snapshots to the HQ region For each regional deployment, use RDS MySQL with a master in the region and send hourly RDS snapshots to the HQ region For each regional deployment, use MySQL on EC2 with a master in the region and use S3 to copy data files hourly to the HQ region

2.

You have a distributed application that periodically computes large calculations across mulitple EC2 instances. The application is also designed to recover gracefully from instance failure. Which of the following would be cost-effective yet not affecting the jobs

Reserved Instances Dedicated Instances Spot Instances On-demand instances

3.

A startup is running a pilot deployment of around 100 sensors to measure street noise and air quality in urban areas for 3 months. It was noted that every month around 4GB of sensor data is generated. The company uses a load balanced auto scaled layer of EC2 instances and a RDS database with 500 GB standard storage. The pilot was a success and now they want to deploy at least 100K sensors which need to be supported by the backend. You need to store the data for at least 2 years to analyze it. Which setup of the following would you prefer?

Add an SQS queue to the ingestion layer to buffer writes to the RDS instance Ingest data into a DynamoDB table and move old data to a Redshift cluster Replace the RDS instance with a 6 node Redshift cluster with 96TB of storage Keep the current architecture but upgrade RDS storage to 3TB and 10K provisioned IOPS

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