currentely i am studying Prepare for Your Salesforce Administrator Credential in which i have completed 71% of total material and only 16 hour left was showing till date 19 june but from yesterday some new modules and projects have been added.

Hope this answers your question. And yes, in short, provided you haven't scheduled your test before 23rd June, you have to cover the new modules too

https://trailhead.salesforce.com/help?article=Changes-to-the-Certified-Administrator-exam-FAQ