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A company runs database servers that require consistent EC2 capacity 24/7 for the next 3 years. Which EC2 purchasing option provides the greatest discount compared to On-Demand pricing?
Reserved Instances (RIs) with a 3-year term and all upfront payment provide the highest discount compared to On-Demand pricing because they commit to a consistent, predictable workload for an extended period. AWS offers significant pricing tiers for RIs, with the 3-year all upfro…Read full explanation
A web application queries a relational database for a product catalogue that changes infrequently but is requested thousands of times per second. Database query latency is becoming a bottleneck. Which AWS service can the company use to cache frequently accessed query results in memory and reduce database load?
Amazon ElastiCache is the correct choice because it provides an in-memory caching layer (using Redis or Memcached) that can store frequently accessed query results, reducing the need to repeatedly query the relational database. This dramatically lowers latency for high-throughput…Read full explanation
A fast-growing mobile game company uses a NoSQL database to store player profiles, leaderboards, and game state. The database must deliver consistent single-digit millisecond response times regardless of the number of concurrent players. The company wants a fully managed service that automatically scales throughput capacity up and down based on traffic and replicates data across multiple Availability Zones for high availability. Which AWS service should the company use?
Amazon DynamoDB is a fully managed NoSQL database service that delivers consistent single-digit millisecond latency at any scale. It supports automatic scaling of throughput capacity based on traffic patterns and replicates data across multiple Availability Zones (AZs) for high a…Read full explanation
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