Yep depends on the building. I had a single office at Microsoft, so did many others. Some shared in pods of 4-8 engineers. I don't recall any spaces with an open plan (except in the UK), but I also didn't visit every single building Microsoft had.

I interned at Google and had to share my office with 2 others, although it's probably different for interns.

I had my own office at Microsoft and so did most people on my team.