PROFESSIONAL-CLOUD-DEVELOPER Question #377: Real Exam Question with Answer & Explanation

Question

You are developing a dashboard that aggregates temperature readings from thousands of IoT devices monitoring a city's ambient temperature. You expect a large amount of viewing traffic resulting in a large amount of data egress once the dashboard is live. The dashboard temperature display data doesn't need to be real-time and can tolerate a few seconds of lag. You decide to deploy Memorystore for Redis as the storage backend. You want to ensure that the dashboard will be highly available. How should you configure the service in Memorystore for Redis?

Options

• AUpdate Memorystore for Redis to the latest version.
• BConfigure Memorystore to use read replicas.
• CUse Private Service Access to enable low-latency network throughput.
• DSet up Serverless VPC Access to avoid receiving traffic over the internet.

Explanation

Using read replicas in Memorystore for Redis enhances availability by providing redundancy. If the primary instance experiences downtime, read replicas can continue serving requests, ensuring that the dashboard remains accessible. Read replicas also help distribute read traffic, which can be beneficial for high-demand applications, even though Redis itself is an in-memory store with fast access. - Updating to the latest version may improve performance or security but does not directly improve availability. - Private Service Access and Serverless VPC Access are network configurations that reduce latency and secure connections but do not inherently improve availability.

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