You can refer to AEM ACE certification guide for better guidance on it.
- Mock tests are not offered by adobe for the certification exams.These certifications are based on real world scenarios and on industry standards , so mock test may not be helpful even if it is available , you should follow these guides and have practical exposure to the topics which it mentions.
Hey Phani, Hope you are doing well and making every effort to make your future bright. Let’s come to the point, to earn the credentials of the AEM 6 Developer Certification exam is not an easy task. You have to put some extra effort investment and time to pass this challenging exam. As far as some helpful links are concerned the following link will provide you everything that you need to prepare, learn, and pass the taught AEM 6 Developer Certification exam. Best of Luck!!!
//Adding with Kautuk, you just need to prepare these topics from these below links - You can easily clear the exam if you follow each topics from these links.