Practice Question Review Areas

Question 1

What configuration is recommended to auto scale a desired amount of EC2 instances at a designated time of day?

Scheduled scaling for Amazon EC2 Auto Scaling

Answer 1

Configure the auto scaling group by creating a scheduled action that kicks off at the designated time.
Set the desired capacity of instances to target amount.
This causes the scale-out to happen before peak traffic kicks in at the designated hour

Min & max count should ONLY be used to specify range of instances

Question 2

Which 2 storage volume types CANNOT be used as boot volulmes?

EC2 Instance Storage, EBS

Answer 2

• Cold HDD (sc1)
• Throughput Optimized HDD (st1)

HDD-backed volumes: optimized for large stremaing workloads for better throughput performance; CANNOT be used as boot volume (st1, sc1)

SDD-backed volumes: optimized for transactional workloads with small I/O size, better for IOPS performance (i.e. gp2, io1, instance store)

Question 3

What is Amazon GaurdDuty?

Amazon GaurdDuty

Answer 3

threat detection service that continuously monitors for malicious activity & unauthorized behavior to proctect your AWS accounts, workloads, & data stored in Amazon S3

AWS data sources:
* CloudTrail events
* VPC Flow Logs
* DNS Logs