1.1.1

Question 1

Explain the fetch stage of the cycle

Answer 1

the PC continually holds the address of the next instruction then the MAR takes a copy and is used to fetch the content from a memory location.

Question 2

Explain the execute stage of the cycle

Answer 2

A command that is a calculation or a comparison is carried out by the ALU where the results are stored in the Accumulator.

Question 3

Explain the decode stage of the cycle

Answer 3

the CU is used to control the cycle and decodes the instruction from the MDR. if the contents of a ROM value is a command goes to the CIR, if it contains an address it goes to the MAR but if it contains a number it will go to the Accumulator.

Question 4

what are the 3 main factors affecting the CPU

Answer 4

Cache, number of cores and clock speed.

Question 5

What is Cache

Answer 5

high speed RAM built into the CPU

Question 6

What is clock speed

Answer 6

The number of FDE cycles per second

Question 7

What are cores

Answer 7

They can do simulations tasks causing the computer to run quicker

Question 8

what does the ALU do

Answer 8

performs arithmetic operations and logical decisions