Not usually. Most SOHC are 8 valves (2 per cylinder) and have 2 cam lobes per cylinder, one to operate inlet valve and the other to operate exhaust valve.

DOHC on the other hand usually have 16V (4 per cylinder) and two cams, one to operate the 8 inlet valves and the other to operate the 8 exhaust valves.

It is however possible to get an 8V DOHC engine such as the old lotus twin cams.