The typical scene when a startup first adopts AWS: two developers, code in Flask or Express, "We have to launch this somehow, but what's ALB, what's ASG, what's IAM Role?" To solve this situation, AWS launched Elastic Beanstalk in January 2011. The promise: "Just zip and upload your code, we'll automatically create EC2, ELB, ASG, CloudWatch — everything."
On DVA-C02, Beanstalk joins ECS, Lambda, App Runner as a "when to choose which compute" scenario axis. Especially the six deployment strategies' trade-offs, .ebextensions vs .platform distinction, and the RDS-inside-environment trap are consistent high-frequency exam points