Test2 Flashcards
What is a Canary Release Deployment?
A deployment configuration that allows you to specify the percentage of traffic to send to one version of your API over another.
How can you increase the fault tolerance of a Direct Connect connection between an on-premise data center and AWS?
Establish a hardware VPN over the internet between the VPC and the on-premise network.
In a Multi-AZ RDS database tier, which also has a standby replica, what 2 events would cause it to failover to the replica?
- Loss of availability in primary Availability Zone
- Storage failure on primary
What are 2 design features of S3 Infrequently Accessed?
- It is designed for data that is accessed less frequently
- It is designed for data that requires rapid access when needed.
What 2 services encrypts data at rest by default?
- AWS Storage Gateway
- AWS Glacier
What should you do if a DynamoDB table used by Kinesis does not have enough capacity to store the data?
Increase the write capacity assigned to the table
What are the 2 things you have to check so that 2 EC2 instances (1 app server, 1 DB server) in different subnets can communicate inside the same VPC?
- Check that the network ACL allows communication between the 2 subnets.
- Check if all the security groups are set to allow te application host to communicate with the DB host on the right port.
What 2 services can monitor and send email notifications when there is an issue?
- Cloudwatch
- SNS
What 2 services are good for decoupling?
- SWF
- SQS
When it comes to the ENI (Elastic Network Interface) attachment to an EC2 instance, what does ‘warm attach’ refer to?
Attaching an ENI to an instance when it is stopped.
What are the 2 possible Event Notification destinations available for S3 buckets?
- SQS
- Lambda function
What is the fastest and most cost-effective solution to automatically back up all of your EBS Volumes?
Use Amazon Data Lifecycle Manager (DLM) to automate the creation of EBS snapshots
What are 3 features of the Auto Scaling cooldown period?
- It ensures that the Auto Scaling group launches or terminates additional EC2 instances without any downtime
- It ensures that the Auto Scaling group does not launch or terminate additional EC2 instances before the previous scaling activity takes effect
- Its default value is 300 seconds
What 2 options do you have to add more elasticity and scalability to your architecture consisting of an EC2 instance hosting a website?
- Setup 2 EC2 instances and put them behind an Elastic Load Balancer
- Setup an S3 Cache in front of the EC2 instance
What would happen to a Multi-AZ deployment RDS if the primary database instance fails?
The canonical name record (CNAME) would is switched from the primary to the secondary/standby instance
