Which of the following is NOT a type of EC2 Placement Group?

The correct answer is that "Static" is not a type of EC2 Placement Group. Amazon EC2 Placement Groups are a feature that allows users to influence the placement of EC2 instances on physical hardware to optimize for certain scenarios.

There are three main types of EC2 Placement Groups:

1. Cluster Placement Group: This type groups instances in a way that they are close to each other in the same Availability Zone, which is ideal for applications that benefit from low network latency and high throughput, such as high-performance computing (HPC) applications.

2. Spread Placement Group: This manages the placement of instances across distinct underlying hardware to reduce the risk of simultaneous failure. This is useful for applications that require high availability and reliability as it spreads instances across multiple physical servers.

3. Partition Placement Group: This type divides instances into different partitions, where each partition has its own set of hardware. This configuration is often used for distributed applications where instances can be spread out to mitigate the risk of failure within a single partition.

Since "Static" does not correspond to any established placement grouping strategy within the AWS EC2 environment, it is identified as the correct answer for this question.