IGCSE Cambridge - Computer Science Unit 3.1 - CPU

How many main components does the CPU have?

• 1

• 2

• 3

• 4

This main component of the CPU sends signals to manage the flow of data through the CPU 

• CU

• ALU

• ACC

• PC

One function of this main component of the CPU is to process calculations.

• ALU

• CU

• ACC

• PC

The ALU stands for?

(a)  

The stored program or Von neumann concept is where data and instructions are stored in the same memory and can only be fetched one at a time.

• True

• False

Which register is built into the ALU?

• PC

• MAR

• MDR

• ACC

Fetch and execute are two cycles of the F-E process.

What is the name of 2nd cycle in the entire process?

(a)  

Which F-E cycle process does this statement describe:

The program counter contains the address of the next instruction to be processed, this is then sent to the MAR using the address bus. The address is then sent to the RAM. Once the address is received, the instruction stored at the location is sent to the MDR, using the data bus. The instruction is then sent to the CIR that is built into the CU.

• Fetch

• Decode

• Execute

• Terminate

Which register is NOT included in the fetch stage

• ACC

• MAR

• MDR

• CIR

An instruction set is:

• Temporary and interim storage for the ACC.

• A list of commands that can be processed by the CPU.

• Non-volatile memory for the execute stage.

• An error checking list used during the execute stage.