EC2

Question 1

How are Elastic IPs scoped when allocated?

Answer 1

Per account, per region.

Question 2

What are the three EC2 placement group types and their purpose?

Answer 2

Cluster Placement Groups (PERFORMANCE)
Spread Placement Groups (Resilience)
Partition Placement Groups (Topology Awareness)

Question 3

What is a best practice for launching EC2 instances into a Cluster Placement Group?

Answer 3

Use all the same size instance and launch them at the same time to ensure that AWS allocates the capacity correctly in the right location.

Question 4

What is Enhanced Networking and why should it be used?

Answer 4

The network card is virtualization aware and gives exclusive access to each VM instance, handling the process end-to-end and thus offloading work from the host CPU.

This allows more bandwidth, faster speeds, and lower latency for networking.

Question 5

EC2 instance store volumes are resilient across what operations?

Answer 5

Reboots only. Stops, terminations, or hardware failures will all cause loss of the instance store volume.