Do computer science Ph.D programs interview?

[xenonscreams]

Hello,

 

I'm applying for Ph.D programs for fall of 2015. My sister got her Ph.D in biology and mentioned interviews when she was giving me the run-down on what to expect and how to prepare. But looking at the various programs I've applied for, I see nothing about interviews. 

 

I've applied to these schools:

 

UW

Maryland

MIT

Berkeley

Stanford

CMU

Harvard

 

Since I'm working full-time, it'd be good to know what to expect not only in terms of preparation, but also in terms of how many vacation days to save.

 

Thank you!