Fundamentals of computer systems

Question 1

What is the Arithmatic and Logic Unit

Answer 1

Carries out arithmatic and logic operation the operands in computer instruction words

Question 2

Fetch -Decode-execute cycle

Answer 2

This is how a computer central processing unit(CPU) carries out program instruction

Question 3

Fetch

Answer 3

This is the stage where the CPU fetches the next instruction from memory.

Question 4

decode

Answer 4

once the instruction is fed and stored in the IR , the cpu needs to understand what operation the instruction is commanding it to perform this is the decode stage

Question 5

Execute

Answer 5

Now that the instruction has been decoded ,the CPU proceeds to execute it. the action in this stage can involve either arithmetic or logical operations ,data transfers between registers and memory ,branching to a different part of the program,or other actions as specified by the instructions .this stage may also involve updating the program counter .

Question 6

Memory/RAM

Answer 6

An array of bytes/words . It reads and writes bytes/words

Question 7

Control Unit

Answer 7

In charge of deciding what’s the next step for the unit

Question 8

Registers

Answer 8

Very fast memory on the CPU.Small amounts of fast memory