Which service is a fully managed service designed to help you build resilient Web3 applications on public and private blockchains?

• A. Amazon OpenSearch Service
• B. AWS AppSync
• C. Amazon MQ
• D. Amazon Managed Blockchain

Answer: (D)

A fully managed blockchain service that handles network provisioning, governance, and maintenance enables Web3 apps to run across both public and private ledgers with minimal operational overhead. Amazon Managed Blockchain provides exactly that: a hosted environment to create and manage blockchain networks using Hyperledger Fabric for private, permissioned networks and Ethereum for public networks. It takes care of setting up the network, onboarding member organizations, managing certificates, and provisioning and patching nodes, while offering governance features to control who participates and what they can do. It also delivers high availability and fault tolerance by running across multiple Availability Zones and handling upgrades and backups automatically, which helps ensure your Web3 applications stay resilient even as they scale. The other options aren’t blockchain networking services—OpenSearch is for search analytics, AppSync is for GraphQL APIs, and MQ is a managed message broker—so they don’t provide the multi-party, blockchain-specific infrastructure needed for Web3 apps.