Cloud Infrastructure & Services Flashcards

What does a Docker image used for Fabric chaincode provide that a bare binary does not?

Answer: A portable, isolated runtime with its dependencies packaged

Container images bundle code and dependencies so the same runtime runs consistently across environments.

In Fabric's external chaincode model, how does the peer interact with chaincode running as a service in the cloud?

Answer: The chaincode server runs separately and the peer connects to it over gRPC

External chaincode runs as its own service, and the peer communicates with it over a gRPC connection configured in connection.json.

Which Kubernetes feature automatically adds or removes pod replicas based on CPU utilization?

Answer: Horizontal Pod Autoscaler

The Horizontal Pod Autoscaler scales replica counts according to observed metrics such as CPU.

Which cloud design choice improves the availability of a Raft ordering service across failures?

Answer: Spreading an odd number of orderer nodes across multiple zones

Raft needs a majority quorum, so distributing an odd number of nodes across zones tolerates zone failure.

What is the role of a Kubernetes NetworkPolicy in a blockchain deployment?

Answer: Restricting which pods can communicate with each other

NetworkPolicies define allowed ingress and egress traffic between pods, limiting lateral movement.

Which Hyperledger project provides automation for deploying production-ready DLT networks on Kubernetes across clouds?

Answer: Hyperledger Bevel

Hyperledger Bevel is an accelerator that automates deployment of Fabric, Besu, Corda, and others on Kubernetes.

Which Hyperledger tool is designed to benchmark the performance of a blockchain deployed on cloud infrastructure?

Answer: Hyperledger Caliper

Caliper measures throughput, latency, and resource use of blockchain networks under defined workloads.