iGCSE U3 Hardware

What component is responsible for the execution or processing of all instructions and data in a computer?

• Central Processing Unit
• Program Counter
• Control Bus
• Core

A chip that carries out the same tasks as a larger circuit made from individual components is called

• an Integrated Circuit
• a central processing unit
• an accumulator
• the cache

the stored program was introduced in the 1940s and is known as

• Von Neumann Architecture
• Backing Store
• Current Instruction Register
• ALU

Part of the CPU that carries out the arithmetic and logic operations

• ALU
• CPU
• IAS
• BIOS

A temporary general-purpose register that stores numerical values at any part of an operation

• Accumulator
• ALU
• Memory Data Register
• Cache

A register that stores the address of the memory location currently being used

• MAR
• ALU
• CIR
• MDR

A register that stores the current instruction being decoded and executed

• CIR
• MAR
• ALU
• MDR

A register that stores data that has just been read from memory or data that is about to be written to memory

• MDR
• CIR
• MAR
• ALU

A register that stores the address where the next instruction can be read and found

• Program Counter
• CIR
• MAR
• MDR

This component of the CPU sends out control signals along the control bus to synchronise data flow and programs.

• Control Unit
• ALU
• CIR
• System Clock