Amazon Web Services SAA-C03 Exam With Confidence Using Practice Dumps

Partition Key Issue:

Using " service name " as the partition key results in uneven data distribution. Some shards may become hot due to excessive logs from certain services, leading to throttling errors.

Changing the partition key to " creation timestamp " ensures a more even distribution of records across shards.

Incorrect Options Analysis:

Option A: On-demand capacity mode eliminates throughput management but is more expensive and does not address the root cause.

Option B: Adding more shards does not solve the issue if the partition key still creates hot shards.

Option D: Using separate streams increases complexity and is unnecessary.

AWS Step Functions is the recommended service for orchestrating multi-step, long-running workflows with state tracking, retries, and external API calls. It reduces operational overhead by eliminating the need for custom orchestration logic.

API Gateway receiving work items and sending them to SQS (Option E) provides buffering, elasticity, and decoupling, ensuring immediate ingestion regardless of backend load.

Option A forces Lambda to handle long execution paths, which is not optimal for 30-minute tasks and multi-state workflows. Option C triggers Lambda directly without buffering. Option D uses fixed EC2 instances, which does not scale dynamically.

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Business-critical applications often require predictable, low-latency I/O and high durability. Provisioned IOPS SSD (io1 or io2) Amazon EBS volumes are specifically engineered for these workloads.

Option C provides consistent, high-performance storage with guaranteed IOPS and low latency. EBS volumes are network-attached and persist independently of the EC2 instance lifecycle, ensuring durability and data protection. Provisioned IOPS volumes are commonly used for databases, transactional systems, and latency-sensitive applications.

Option A (instance store) offers low latency but is ephemeral and loses data on instance stop or failure. Option B is in-memory caching and not durable storage. Option D is optimized for large, sequential workloads and does not provide consistent low latency.

Therefore, C is the correct choice because it delivers the required performance, durability, and reliability for mission-critical applications.