I have followed Tutorial Dojo practice tests for AWS Data Analytics Specialty DAS-C01 and passed the test. The practice test are well designed with explanations for each scenario. This practice test course material helped me a lot in passing the tests. I am recommending this course to everyone who is willing pass the test in single sitting.
Only thing I would suggest in these practice tests is save previously done tests so that we can go back and review later. After the test if we close the page all the test history & review is lost. Rest of all good.