Yes, he can do any masters or diploma as it's gonna take more than 1.5 years to complete the sponsorship program. My assumption on sponsorship program:
Getting a stable job in Canada: 3 months
Settling in job and location: 6 months
Applying for sponsorship: 1 month
Sponsorship process: 6 to 10 months
So it's a minimum of 20 months. for most of this 20 months you cannot be together as you will be working in Canada and he will be in India (guessing you are from India).
No what I am asking is if we are married already, can he be a student doing masters (student visa) in Canada while I do a job lodge his spousal application and while his spousal application is being processed?