I've an AWS CSA Professional Level exam scheduled for 27th and someone told me that there will be lot of questions from SQS/SWF. I'm going through the AWS FAQs/Documentations and trying my level best to understand.
Although, to some extent I understood but I again get lost very soon in my head when I try to compare the difference and use case scenarios of these services. May be because I'm not from the developer background. :(
Could someone please help me in understanding, when one would use SNS versus SQS, and why are they always coupled together?