Answer: Deploy compute optimized EC2 instances into a cluster placement group., Attach the EC2 instances to an Amazon FSx for NetApp ONTAP file system.

## Explanation **Correct Answers: A and E** **A. Deploy compute optimized EC2 instances into a cluster placement group.** - This is correct because cluster placement groups provide low-latency, high-bandwidth network connectivity between instances within a single Availability Zone, which is essential for latency-sensitive HPC workloads. **E. Attach the EC2 instances to an Amazon FSx for NetApp ONTAP file system.** - This is correct because FSx for NetApp ONTAP provides multi-protocol access (NFS, SMB, iSCSI) and is designed for high-performance workloads with low latency requirements. It supports both NFS and SMB protocols simultaneously. **Why other options are incorrect:** **B. Deploy compute optimized EC2 instances into a partition placement group.** - Partition placement groups are designed for distributed workloads that need to be isolated from failures in other partitions, not specifically for low-latency HPC workloads. Cluster placement groups provide better latency performance. **C. Attach the EC2 instances to an Amazon FSx for Lustre file system.** - FSx for Lustre is optimized for high-performance computing and machine learning workloads, but it only supports the Lustre protocol, not NFS and SMB multi-protocol access as required. **D. Attach the EC2 instances to an Amazon FSx for OpenZFS file system.** - FSx for OpenZFS provides NFS access but does not support SMB protocol, so it cannot provide the required multi-protocol access. **Key Points:** 1. **Cluster Placement Groups** provide the lowest latency network connectivity between EC2 instances 2. **FSx for NetApp ONTAP** is the only FSx option that supports both NFS and SMB protocols simultaneously 3. The combination of cluster placement groups for compute instances and FSx for NetApp ONTAP for storage meets all requirements with minimal latency

Author: LeetQuiz Editorial Team