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All four domains are design tasks. You are probably ready when your last two unseen, timed results come in around 80% or better and no domain is still a gap.

Two fresh timed practice sets at 80% or better, with wrong answers that come from a handful of small gaps, are the readiness bar for booking AZ-104.

Match the shape of the communication to the right Azure messaging service: Service Bus for durable business commands, Event Grid for state-change events, Event Hubs for high-volume streams, and Queue Storage for simple backlogs.

Scope the URL shortener to two core features, run the capacity math out loud, and default to counter-based short IDs with the hash-based option ready.

Pick the rate-limiting algorithm from the wording of the limit, place the limiter where its context lives, and decide between local and shared state with the arithmetic stated out loud.

Classify the prompt, recompute the numbers, and state the tradeoff with the cue that picks the side: capacity, availability, fan-out, consistency, and the 16 decision areas to re-check before the interview.

Compare AZ-900 and AZ-104, decide which Azure certification to take first, and use assessment feedback to choose the right next step.

Separate estimating future Azure cost from analyzing and controlling running Azure spend.

Separate encrypted internet VPN tunnels, user VPN access, private provider circuits, and adjacent networking services.

Match the VM option to the need: one server, many identical VMs, datacenter resilience, zone resilience, or virtual desktops.

Use scope details to tell a private network, a segment inside it, and VNet-to-VNet connectivity apart.