Threads vs Cores

Question

Say if I have a processor like this which says # cores = 4, # threads = 4 and without Hyper-threading support.

Does that mean I can run 4 simultaneous program/proces

Answer 1

That's basically correct, with the obvious qualifier that most operating systems let you execute far more tasks simultaneously than there are cores or threads, which they accomplish by interleaving the executing of instructions.

A system with hyperthreading generally has twice as many hardware threads as physical cores.