There are no doubt for the CCISO syllabus. But solving through mock tests only is enough as they are very repetitive and relevant as per the present exam conditions. ec-council chief information security officer mock tests helped me score 91% and helped me clear the information security controls and audit management, and information security core competencies topics.
CCISO Certification Syllabus
Use this quick start guide to collect all the information about EC-Council CCISO (712-50) Certification exam. This study guide provides a list of objectives and resources that will help you prepare for items on the 712-50 EC-Council Chief Information Security Officer exam. The Sample Questions will help you identify the type and difficulty level of the questions and the Practice Exams will make you familiar with the format and environment of an exam. You should refer this guide carefully before attempting your actual EC-Council CISO certification exam.