Trending @Wipro; Is it mandatory to complete 7.5 hours in office on 3 office days ?

Nope. There’s no minm hours. If mytime is getting updated for 1 hour, then 1 hour is also fine

There are times when I have gone for 15 mins only. That's also acceptable. For now they are not tracking the time spent in the office

No

No time boundation when going to office

Heard news that they might start tracking office hours now. 7 hours minimum. Not enforced yet I guess so enjoy while you can.

No it depends in project.