DBS-C01 · Question #31
A company is writing a new survey application to be used with a weekly televised game show. The application will be available for 2 hours each week. The company expects to receive over 500,000…
The correct answer is A. Amazon DynamoDB E. Amazon ElastiCache. Explanation Amazon DynamoDB (A) is purpose-built for massive scale with single-digit millisecond latency and virtually unlimited throughput for concurrent writes, making it ideal for handling 500,000+ entries in a short 2-hour burst. Amazon ElastiCache (E) complements this by…
Question
A company is writing a new survey application to be used with a weekly televised game show. The application will be available for 2 hours each week. The company expects to receive over 500,000 entries every week, with each survey asking 2-3 multiple choice questions of each user. A Database Specialist needs to select a platform that is highly scalable for a large number of concurrent writes to handle he anticipated volume. Which AWS services should the Database Specialist consider? (Choose two.)
Options
- AAmazon DynamoDB
- BAmazon Redshift
- CAmazon Neptune
- DAmazon Elasticsearch Service
- EAmazon ElastiCache
How the community answered
(28 responses)- A82% (23)
- B11% (3)
- C4% (1)
- D4% (1)
Explanation
Explanation
Amazon DynamoDB (A) is purpose-built for massive scale with single-digit millisecond latency and virtually unlimited throughput for concurrent writes, making it ideal for handling 500,000+ entries in a short 2-hour burst. Amazon ElastiCache (E) complements this by acting as an in-memory caching layer that can absorb rapid, high-volume write bursts and reduce pressure on the backend database during peak traffic windows.
Why the distractors are wrong:
- Amazon Redshift (B) is an OLAP data warehouse optimized for complex analytical queries, not high-throughput concurrent transactional writes.
- Amazon Neptune (C) is a graph database designed for relationship-heavy data (social networks, fraud detection), not simple survey responses at scale.
- Amazon Elasticsearch Service (D) is a search and analytics engine, not a primary write-optimized database for transactional workloads.
Memory Tip: Think "Fast writes under fire" - when you see keywords like concurrent writes, massive scale, and short time windows, immediately think DynamoDB (scalable NoSQL) + ElastiCache (in-memory speed boost). These two are the classic AWS "write spike" duo on the exam.
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