CPU1- Introduction to CPU

Question 1

What does CPU stand for?

Answer 1

Central Processing Unit

Question 2

What is CPU?

Answer 2

CPU gather and execute instructions in their order.
Control peripherals.

It is the brain of a computer. The police traffic in a cross road.

Question 3

Who is the father of CPU?

Answer 3

John von Neumann

Question 4

Draw Von Neumann Architecture.

Answer 4

Input —-> CPU ——> Output Unit
ALU
|
v
Control Unit
^ |
| v
Main Memory

Question 5

What are the components of CPU

Answer 5

ALU (Arithmetic and Logic Unit)
CU (Control Unit)
Registers
Program Counter
System Clock

Question 6

Explain Arithmetic and Logic Unit.

Answer 6

Performs execution of instructions such as Arithmetic (+-x/), Comparison (>=<) and Logic (True or False)

Question 7

Explain Control Unit

Answer 7

Directs and coordinates operations in computer
Performs fetch-execute cycle

Question 8

Registers

Answer 8

High speed storage.
Fastest memory in memory hierarchy
Data can only be acted upon CPU when they are stored in registers

Question 9

Explain Program Counter.

Answer 9

Address pointer
Register address of currently executing instructions
Counter value increases by 1 when each instructions get fetched

Question 10

Explain System Clock

Answer 10

Microprocessor that regulates timing and speed of computer system’s functions
one clock= one vibration of clock chip
speed of computer’s CPU is measured in Hz
3.8GHz= 3.8 billion clock vibrations per second