Resources for all Big data certification preperation
AWS Certified Big Data Specialty 2019 - In Depth and Hands On! by Frank Kane and Stephane Maarek
It is an 11 hour course which covers all services related to big data that aws has to offer. This course also includes labs and can be watched with oreilly subscription
Learning Path: AWS RedShift by Rich Morrow
The 3 hour course focuses on RedShift with hands on labs and can be watched on oreilly