SO I recently cleared my AWS associate architect exam (2nd time) and here are the list of services / types that normally comes in the exam!

Type of questions

Most of the questions are based on

1. "when to use what" - which services are suited
2. "what's the more secure way"
3. "what's the most cheaper way"
4. "which of these requires less operational overhead"

Topics

1. s3 + Cloud front and OAI
2. S3 different use cases (when to use Standard, Glacier/ vault etc)
3. SQS + RDS / different queues and when to use FIFO vs standard
4. VPC peering and endpoints
5. ec2 auto scaling related (scheduled scaling/ cool down periods)
6. Redshift availability/durability / multi region
7. DynamoDB / Dax / DynamoDB streams
8. iam roles/policies and types (lambda to s3/ instance profile roles etc /cross account roles)
9. storage gateway (volumes/cached)
10. data sync vs s3 transfer acceleration
11. Kinesis data streams/ analytics/firehose
12. s3 select vs glacier select
13. RDS related (when to use aurora - latency/ read replicas vs Multi AZ )
14. Monitoring related (cloudtrail vs cloudwatch vs trusted advisor)
15. VPC scenarios (how to create networking). It needs the practical knowledge of setting up access to the Internet for the EC2 instances, for example from Igor (comments)