Continuous improvement for existing solutions
Practise only this domain. 87 questions with explanations, 20 at a time.
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- A company wants any S3 bucket that becomes publicly readable to be detected and returned to a compliant state automatically. Which approach meets this need?Medium
- A data pipeline in private subnets reads about 40 TB per month from an S3 bucket in the same Region. The monthly bill shows large per-GB charges for NAT gateway processing. Which change removes most of this cost without changing the pipeline code?Medium
- A checkout service calls an inventory service synchronously. When inventory slows down, checkout threads wait until they time out, and within minutes every service on the platform stops responding. Which set of design changes MOST effectively contains this failure?Hard
- A legacy app has four problems: web servers hit 90 percent CPU during office hours; the database rejects new connections at its limit; user sessions are held in web server memory, so users are logged out on every deploy; and each release needs two hours of downtime. Which single design fixes all four?Hard
- A finance manager wants to break down last year's EC2 and S3 spending by linked account and by cost allocation tag, view the trend in charts, and see a forecast for next quarter. Which tool should be used?Easy
- A reporting database on RDS for MySQL shows rising read latency while CPU stays near 20 percent. Freeable memory keeps falling and read IOPS climb whenever the large reports run. What is the most likely cause and the best fix?Medium
- Users report sporadic slowness in an application built from API Gateway, Lambda and DynamoDB. The engineers need to see how much time each component adds to an individual request. Which AWS service should they adopt?Easy
- After a lift-and-shift, a web tier runs in one Availability Zone and keeps each user's session on a particular server through load balancer stickiness. The team must improve availability first. Which change should come first?Medium
- A payments API runs on Amazon ECS behind an Application Load Balancer. Each release replaces every task at once, and a faulty build has repeatedly caused outages for customers. The team wants to limit the blast radius of bad releases. What should it change?Medium
- An internal reporting service on EC2 reads its database password from a file on disk, and an audit found that anyone with shell access can read it. The company wants encrypted storage, automatic rotation, and access logging tied to the instance's identity. What should the team do?Easy
- A ticketing system stores all open-ticket records in one DynamoDB table whose partition key is the status field, which can only be open, pending, or closed. CloudWatch shows throttling on the table during peak support hours. Which fix addresses the root cause?Hard
- A BW/4HANA system needs to keep infrequently accessed but still queried data out of HANA memory while leaving it available inside the database. Which feature should be used?Medium
- HANA write performance degrades every few minutes. Traces show savepoint duration climbing and users see short write stalls, while CPU and network look normal. Which layer should be investigated first?Hard
- A standalone SAP application server on EC2 occasionally loses its underlying host. The team wants automatic recovery that keeps the instance ID, private IP and attached volumes. Which mechanism fits?Medium