IGCSE Computer Architecture

Name the component A.

• ALU

• IAS

• CU

• MU

It carries signals from the CU to all the other computer components.

• address bus

• control bus

• data bus

• current instruction register

Name the register A.

• MAR

• MDR

• ACC

• PC

The register that holds data temporarily from the ALU during the calculations.

• MAR

• MDR

• PC

• ACC

What is the function of the Program Counter (PC) in a CPU?

• Hold the address of the next instruction

• Store the result of calculations

• Manage data flow

• Control the timing of operations

Which register is responsible for holding the address of the next instruction to be executed?

• MAR

• MDR

• ACC

• PC

What is the primary purpose of the Input/Output Unit in a computer system?

• Store data

• Perform calculations

• Manage communication with external devices

• Execute instructions

• microprocessor

• random access memory

• read only memory

• hard disk

What is the role of the Memory Unit (MU) in a computer system?

• Store data

• Perform calculations

• Control data flow

• Execute instructions

It is the bus that carries the data from the processor to the memory or any appropriate devices.

• address bus

• data bus

• control bus

• program counter