Term 1- FDE cycle

Question 1

What are the main components of a computer?(8)

Answer 1

Case, motherboard, CPU, GPU, output devices, ram, rom, input devices

Question 2

What does the CPU do?

Answer 2

Processes data, executes instructions, clock speed measured in hertz

Question 3

Hertz

Answer 3

Number of cycles per second

Question 4

Each processor has a … in which instructions are executed

Answer 4

Core

Question 5

Each core executes instructions …

Answer 5

Independently

Question 6

Concurrent processing

Answer 6

Being processed at the same time

Question 7

Cache

Answer 7

Very fast, very small amount of memory on processor chip, acts as intermediary between processor and main memory, holds commonly used instructions

Question 8

Accumulator

Answer 8

Register used by ALU to store results of calculations

Question 9

ALU

Answer 9

Arithmetic Logic Unit, the component of the CPU that performs arithmetic as a logic calculator

Question 10

PC

Answer 10

Program counter, increments by one each time, storing the address of the next instruction

Question 11

MAR

Answer 11

Memory address register, stores the address of the current instruction/data

Question 12

MDR

Answer 12

Memory data register, Stores the data/instruction that has been fetched from memory

Question 13

CIR

Answer 13

Current instruction register, temporarily holds the instruction which is being decoded by the control unit

Question 14

CU

Answer 14

Control unit, component of the CPU that manages instructions

Question 15

FDE cycle in order(7)

Answer 15

1. PC holds address of next operation
2. Copy contents of PC to MAR from memory
3. Increment PC
4. load the instructions MAR points to to MDR
5. Copy instructions from MDR to CIR
6. CU decodes instructions in CIR
7. Execute the instruction