My bad! I knew this - just wasn't sure if this is what 'tracker activated' means. Thanks for clarifying.
They normally let you know in the medical request email itself if you need interview or not. I am assuming if they didn't ask you in that email, you probably don't need it.
Also, Just to create some awareness, let me share the process involved to get PR:
1. It all starts with an ecas update of 'We started processing your application on 'xxxxxxx' '
2. After 7-14 business days, you will receive medical request via email asking for submission of medicals and paying RPRF fees ($490 CAD)
Make sure you find a doctor on time who can do your medicals and submit it quickly.
3. After 3-5 business days of submission of medicals (confirm with the doctor when did he submit your medicals), 4th line will be added ' Medical results have been received'
4. After 5-15 business days, your ecas status will be updated from 'In Process' to 'Decision Made'. This will also add a 4th line 'A decision has been made on your application. The office will contact you concerning this decision' to your application.
5. After 0-7 business days, you will receive passport request via email asking for passport and 2 recent photographs. To avoid any further delay, have your 2 photographs ready to mail it (Canada Post preferably) as soon as possible
6. After 5-25 business days, you will receive passport with stamped VISA and COPR (confirmation of PR) document
P.S. - Please expect some delays due to holiday season in Canada at this point of time.