The AWS Certified Solutions Architect – Associate exam is intended for individuals with experience designing distributed applications and systems on the AWS platform. Amazon Web Services (AWS) Certification is fast becoming the must have certificates for any IT professional working with AWS

This test has questions from all the following domains:
Design cloud services - 15%
Planning cloud services - 15%
Monitoring cloud services - 15%
Logging - 15%
Implementation / Deployment - 10%
Data Security - 20%
Troubleshooting - 10%

This app gives you around 800 questions to practice. 20 questions per day are free and to do more you can do in-app purchase.