Unit 4 review_2

What is the primary function of the Arithmetic Logic Unit (ALU)?

• Store program instructions

• Control data flow between components

• Perform calculations and logical operations

• Manage input and output devices

Which CPU component is responsible for issuing commands to other hardware?

• Memory Address Register (MAR)

• Control Unit (CU)

• Arithmetic Logic Unit (ALU)

• Memory Data Register (MDR)

What does the Program Counter (PC) store?

• The result of the last calculation

• The memory location being accessed

• The address of the next instruction

• The data being processed

Which register temporarily holds the instruction the CPU is currently executing?

• Accumulator (ACC)

• Memory Data Register (MDR)

• Program Counter (PC)

• Current Instruction Register (CIR)

What is the role of the Accumulator (ACC) in the CPU?

• Store the memory address of the next instruction

• Store results from the ALU

• Decode instructions

• Manage control signals

Which register holds the address of the memory location being accessed?

• Memory Address Register (MAR)

• Memory Data Register (MDR)

• Current Instruction Register (CIR)

• Program Counter (PC)

If data is being transferred to or from memory, which register is used?

• Current Instruction Register (CIR)

• Memory Data Register (MDR)

• Program Counter (PC)

• Accumulator (ACC)

What happens if the Control Unit fails?

• The CPU cannot perform calculations.

• Data is stored incorrectly in memory.

• The CPU cannot issue instructions or manage processes.

• Input and output devices will stop functioning.

Which component performs both arithmetic and logic operations?

• Control Unit

• Program Counter

• Arithmetic Logic Unit

• Memory Address Register

The CPU component that stores intermediate calculation results is called the:

• Memory Data Register

• Current Instruction Register

• Program Counter

• Accumulator