DBS-C01 Question #72: Real Exam Question with Answer & Explanation

Question

A retail company is about to migrate its online and mobile store to AWS. The company's CEO has strategic plans to grow the brand globally. A Database Specialist has been challenged to provide predictable read and write database performance with minimal operational overhead. What should the Database Specialist do to meet these requirements?

Options

• AUse Amazon DynamoDB global tables to synchronize transactions
• BUse Amazon EMR to copy the orders table data across Regions
• CUse Amazon Aurora Global Database to synchronize all transactions
• DUse Amazon DynamoDB Streams to replicate all DynamoDB transactions and sync them

Explanation

Explanation

Amazon DynamoDB Global Tables (Option A) is the best choice because it provides fully managed, multi-region replication with predictable single-digit millisecond read and write performance at any scale, with minimal operational overhead - directly satisfying both requirements stated in the question.

Why the distractors are wrong:

• Option B (Amazon EMR) is a big data processing framework designed for analytics workloads like Hadoop/Spark - it is not a database replication or synchronization solution and introduces significant operational complexity.
• Option C (Aurora Global Database) can synchronize globally, but Aurora is primarily optimized for reads across regions (writes go to one primary region), making write performance less predictable globally compared to DynamoDB's multi-active write capability.
• Option D (DynamoDB Streams) is a feature that enables replication by capturing change events, but it requires custom development and management to build a replication solution - this significantly increases operational overhead rather than minimizing it.

🧠 Memory Tip

Think "Global Tables = Global Writes, Zero Hassle." Whenever you see keywords like global growth + predictable performance + minimal operational overhead, DynamoDB Global Tables is almost always the answer, as it provides multi-active (read AND write) replication across regions fully managed by AWS.

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