It's almost certainly going to be rubber dome.
Generally, with very, very few exceptions, keyboards that are branded by a major computer manufacturer and that are recent (as in, the last 10 or 15 years) are going to be rubber dome.
Those exceptions would be... off the top of my head...
IBM Model M and variants
Compaq MX 11800
Apple Extended Keyboard II (BARELY makes the 15 year cutoff)