Continuous Improvement for Existing Solutions Flashcards
What to use for shared persistent storage for ECS Fargate containers
EFS
What is AWS Transfer Family used for?
FTP
What types of EC2 operating systems are supported by EFS
Linux only
Which costs more: On-Demand Instances or Spot Instances?
On-Demand Instances cost way more. Spot Instances have more than a 90% discount compared to On-Demand.
Which service is a simple document repository
AWS Artifact
What are the 3 types of scaling for AWS OpWorks Stacks
24/7, time-based, and load-based
What might cause users to get “access denied” messages while trying to launch a Service Catalog product?
- The product does not have a launch constraint assigned.
- The launch constraint does not have permissions to CloudFormation.
- The user launching the product does not have required permissions to launch the product.
A client’s RDS instance has “Available” listed in the Maintenance column. They don’t want to update until they can have a chance to review the changes. What do you advise?
Delay the update until they’re comfortable.
Which service assess applications for vulnerabilities or deviations from best practices.
Amazon Inspector
What two methods can be used to restore access to EC2 instances if you lose your private SSH key?
Stop the instance, detach its root volume, and attach the root volume to another instance. Use that instance to edit the authorized_keys file.
OR
AWS Systems Manager Automation with the AWSSupport-ResetAccess
You’re setting up Elasticsearch for your Aurora database. While using Database Migration Service to load the indexes from Aurora, it terminates with an Elasticsearch return code of 429 and a message stating ‘Too many requests’. What must be done to fix this?
Set the number of queue slots as a product of the number of indexes, shards, and replicas
A new policy requires use of encryption at rest for all data. Some existing EC2 instances were created without encryption for their root EBS volume. How do you fix this?
Stop the instances, create AMIs, and redeploy
A client is migrating Linux servers with RAID1 disk configuration to EC2 and intends to keep the same disk configuration. How should you advise them?
Carefully evaluate whether or not RAID on EBS is the correct choice
For petabyte-scale amounts of data that needs to be processed over a few days once per quarter, is it better to use S3 Standard or S3 Standard-IA
S3 Standard
What port/s does a server use to respond to an HTTP request
Ephemeral ports
What do you need to do in order to validate the checksum of S3 objects that were uploaded with Multipart Upload?
Use a custom metadata parameter instead of the entity tag checksum.
You have a Network Load Balancer with an Autoscaling Group running EC2 instances. You notice that instances in one AZ have a lot of traffic while instances in another AZ have very little. What is the most likely reason for this?
Network Load Balancers cannot handle cross-zone load balancing
How to avoid connection issues with Amazon RDS Multi-AZ instances after failover?
Ensure that the subnets have the same routing rules.