Systems Architecture Revision (AQA 8525)

Which register stores the address of the next instruction to be executed?

• Program Counter

• Memory Address Register

• Memory Data Register

• Current Instruction Register

• Accumulator

Which register stores an address of an instruction or piece of data which is about to be fetched?

• Program Counter

• Memory Address Register

• Memory Data Register

• Current Instruction Register

• Accumulator

Which register stores data or instructions that have just been fetched?

• Program Counter

• Memory Address Register

• Memory Data Register

• Current Instruction Register

• Accumulator

When an instruction has been fetched, which register is it passed to from the MDR?

• Program Counter

• Memory Address Register

• Memory Data Register

• Current Instruction Register

• Accumulator

If data is being loaded into the CPU to be used later in a program, which register does it go to?

• Program Counter

• Memory Address Register

• Memory Data Register

• Current Instruction Register

• Accumulator

Which register stores the results of calculations done in the ALU?

• Program Counter

• Memory Address Register

• Memory Data Register

• Current Instruction Register

• Accumulator

Which part of the CPU sends control signals to other components?

• Control Unit

• Clock

• Arithmetic Logic Unit

• Cache

• Registers

Which part of the CPU decodes instructions?

• Control Unit

• Clock

• Arithmetic Logic Unit

• Cache

• Registers

Which part of the CPU keeps all the components synchronised?

• Control Unit

• Clock

• Arithmetic Logic Unit

• Cache

• Registers

Which part of the CPU stores frequently used data and instructions?

• Control Unit

• Clock

• Arithmetic Logic Unit

• Cache

• Registers