SOA-C03 Sample Questions & Answers

gp3 volumes allow you to provision IOPS and throughput independently of storage capacity. Unlike gp2, where IOPS are tied to size (3 IOPS/GB), gp3 delivers a baseline of 3,000 IOPS and allows scaling up to 16,000 IOPS without increasing the volume size, often at a lower cost.

Multipart upload is recommended for files larger than 100 MB and required for files larger than 5 GB. It improves throughput by uploading parts in parallel.

S3 Transfer Acceleration uses AWS Edge Locations to route data over the optimized AWS global network instead of the public internet, significantly improving speed for long-distance transfers. Multipart uploads allow large files to be broken into chunks, improving throughput and reliability by allowing retries of individual failed parts.

Amazon RDS Performance Insights is a database performance tuning and monitoring feature that helps you quickly assess the load on your database. It visualizes the database load and filters it by waits, SQL statements, hosts, or users, allowing you to pinpoint the specific queries causing high CPU.

AWS Systems Manager Run Command allows you to remotely and securely manage the configuration of your managed instances. It is the standard, managed way to run scripts (like service restarts) on instances without SSH.

EventBridge allows for content-based filtering of events. By creating a rule that matches the specific API call (AuthorizeSecurityGroupIngress) and inspecting the request parameters (cidrIp: 0.0.0.0/0, port: 22), you can trigger immediate alerts via SNS. This is faster and more granular than metric filters.

While Compute Optimizer can provide recommendations with less data (min 30 hours for some), for optimal and full recommendations, it typically analyzes up to 14 days of history. However, enabling the enhanced infrastructure metrics feature allows it to look back 3 months. In the context of standard requirements, having sufficient history (typically cited as days) is key.

Compute Optimizer uses CloudWatch metrics. Since memory is not a default EC2 metric, the CloudWatch agent is required for Compute Optimizer to analyze memory usage and provide accurate right-sizing recommendations including memory.

CloudWatch Anomaly Detection uses machine learning algorithms to analyze historical metric data and create a model of expected behavior. It creates a band of expected values and can trigger alarms when the metric goes outside this band, making it ideal for unpredictable patterns.

False. S3 Versioning only applies to objects created or modified AFTER versioning is enabled. Existing objects remain as they are (with a null version ID) until they are overwritten.