DP-300 Question #315: Real Exam Question with Answer & Explanation

Question

You have an Azure SQL database named DB1. You need to ensure that DB1 will support automatic failover without data loss if a datacenter fails. The solution must minimize costs. Which deployment option and pricing tier should you configure?

Options

• AAzure SQL Database managed instance General Purpose
• BAzure SQL Database Hyperscale
• CAzure SQL Database Premium
• DAzure SQL Database managed instance Business Critical

Explanation

Explanation

Azure SQL Database Premium (Option C) supports Active Geo-Replication and Auto-Failover Groups, which provide automatic failover with zero data loss (using synchronous replication) in the event of a datacenter failure - and it does so at a lower cost than Business Critical or Managed Instance tiers.

Why the distractors are wrong:

• Option A (Managed Instance General Purpose) uses asynchronous replication and does not guarantee zero data loss during failover, making it unsuitable for this requirement.
• Option B (Hyperscale) has limited geo-replication support and is primarily designed for massive scale-out scenarios, not cost-effective failover solutions.
• Option D (Managed Instance Business Critical) does support zero data loss failover but is significantly more expensive than Azure SQL Database Premium, violating the "minimize costs" requirement.

Memory Tip: Think "Premium = Protection at a Price-conscious level" - when you see automatic failover + no data loss + minimize cost in a question, Premium tier on a single Azure SQL Database (not Managed Instance) is the sweet spot. The keyword "minimize costs" is your signal to eliminate the more expensive Managed Instance options.

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