The controller is connected to the Select one: a. System BUS b. Processor BUS External BUS O d. None of the mentioned The unit of power density is Select one: a. None O b. Watts/cm2 c. Watts/mm2 O d. Watts/cm3 The register that keeps track of the instructions in the program stored in memory is: Select one: O a. Direct register O b. Control register O c. Program Counter O d. Status register The correspondence between the main memory blocks and those in the cache is given by Select one: O a. Assign function O b. Hash function O c. Mapping function O d. Locale function