Microsoft Azure Architect Design (AZ-304) Practice Test

The appropriate storage tier for data that is rarely accessed but must be immediately accessible is the Cool tier. This tier is designed specifically for storing infrequently accessed data while allowing for quick access when necessary. The Cool tier provides lower storage costs compared to the Hot tier, which is intended for data that is accessed frequently. Although it is less expensive to store data in the Cool tier over time, it is slightly more costly to retrieve data compared to the Hot tier, making it an efficient choice for scenarios where you anticipate occasional access without needing the immediate retrieval speed or frequent availability of the Hot tier. The Archive tier, while offering the lowest storage costs, is not suitable for data that needs immediate accessibility because accessing data in the Archive tier requires a rehydration process, which could lead to delays. The Premium tier is designed for high-performance workloads that require low latency and is not cost-effective for infrequently accessed data. Thus, for your specific scenario, the Cool tier strikes the right balance between cost and accessibility needs.