1.1 Systems architecture

Put these 4 in to order of speed to access. Order them from quickest to slowest.

• RAM, Cache, Register, Hard-Drive

• Cache, Register, RAM, Hard-Drive

• Register, RAM, Cache, Hard-Drive

• Register, Cache, RAM, Hard-Drive

Which register stores that instruction or data after it has been fetched from memory?

• MAR

• Accumulator

• MDR

• PC

Which register stores the location in memory of the next instruction to be processed?

• MDR

• PC

• Accumulator

• MAR

Which register stores the address of the current instruction or data to be fetched from memory?

• MAR

• MDR

• Accumulator

• PC

Which register stores data before and after it has been processed by the ALU?

• PC

• MAR

• CIR

• Accumulator

What is the unit of measurement for a CPU’s clock speed?

• Bytes

• Bits

• Hertz

• Cores

What does the Control Unit do?

• Controls the heat inside the CPU

• Controls the flow of data inside the CPU

• Controls the RAM

• Not used

Which is not a CPU register?

• MAR

• MDR

• PC

• ALU

The purpose of the CPU processor is to:

• Execute instructions performed upon applications

• Execute instructions performed upon data

• Execute applications performed upon data

• Watch instructions performed upon data

If the number of cores goes up from 2 to 4, what is the exact effect on performance?

• Performance decreases

• The max number of instructions executed per second doubles

• max number of instructions executed per second quadruples

• The max number of instructions executed per second is halved