You could crack the AWS Solution Architect interview through thorough practice and preparing through right materials. In order to get a good command of AWS, get yourself registered for a course on AWS solutions architect.
With the help of the training, do projects which help you in getting sufficient hands-on experience. After these check out our blog post on AWS interview questions, which contain numerous questions graded from basic to advanced levels by top recruiters of AWS professionals.
If you are aiming for a career as a Solutions Architect in AWS, then check out the AWS certifications course of Intellipaat, which offers you online training course and guided projects that help you gain sufficient practical exposure.
Also, if you are interested in learning more, then check out AWS Interview Questions and Answers to get started.