Senior questions

An internal serverless API is needed for order management. Orders must be stored in a DynamoDB table with all access routed through a Lambda function — never direct database access. The Lambda execution role should follow least-privilege principles, limiting permissions to only what's necessary.

You need to deploy a web application accessible only within a VPC. EC2 instances run in private subnets behind an Application Load Balancer in public subnets. A startup script at /tmp/userdata.sh runs a simple HTTP server with a /health endpoint on port 80.

You have created a macvlan network called mymacvlan to give containers their own MAC addresses on the physical network. However, containers mac1 and mac2 started on this network cannot ping the host or the gateway at 192.168.50.1.

You manage a CustomResourceDefinition (CRD) for "Widgets". Currently, the API allows users to create widgets with missing or invalid configuration, which causes the controller to crash.

Configuration files in /etc are at risk of being lost due to accidental changes or deletions, and there's currently no automated backup process in place.

You have a shell script at /usr/local/bin/check_app.sh that runs periodically and exits with a non-zero code. The script is currently failing due to a simulated error condition.

Disk usage on the /var partition is at 92% and increasing rapidly. You need to identify the largest files consuming space and determine if they're actively used by processes or need log rotation.

A process is consuming excessive resources, but its origin is unclear.

Your Nginx web server has recently experienced performance issues caused by excessive traffic from a few aggressive clients. You've decided to enable rate limiting based on the recent traffic pattern. To determine the proper limit, you first need to analyze request frequency.