I am preparing for ACP-100 Certification.. Just recently, I noticed that ACP-600 Exam details I found. My main focus is to get ACP-100 .. Can the training material of ACP-600 may be useful to ACP-100 ? I noticed 9 h 37 minutes course material for ACP-600
Yes, you can learn it
But please, keep this info:
ACP-100 covers the full spectrum of Jira administration; the target audience is someone with 2-3 years of experience.
ACP-600 focuses solely on project administration in Jira; the target audience is someone with ~6 months exposure to Jira. The accompanying course is designed to teach what you need to know.
If you want more granular information on the differences, compare the descriptions of the certifications here: https://www.atlassian.com/university/certification, and also download and compare the respective Exam Topics PDFs.