01 - Introduction to the CPU

 1. The CPU is sometimes called the "brain" of a computer. What does CPU stand for?

  Computing Power Unifier

  Central Processing Unit

  Central Projector UFO

  Central Putrid Unificator

 2. The image below shows an Intel CPU. Read the paragraph below and fill in the blanks.
The purpose of the Central Processing Unit (CPU) is to carry out program ____________. 
Each CPU is designed to execute a specific group of ____________, the instruction set.





 3. Fill in the blanks below.
The computer industry has used the term 'central processing unit' at least since the early 
1960s. Traditionally, the term 'CPU' refers to a p_____________, more specifically to its 
processing unit and control unit (CU), distinguishing these core elements of a computer 
from external components such as main memory and input/output circuitry.





 4. Who is the image below and the paragraph describing?
___________________________________ was a child prodigy. When he was 6 years old, 
he could divide two 8-digit numbers in his head and could converse in Ancient Greek.
He is also credited with he book 'The Computer and the Brain' - it is speculative in nature
but he discusses similarities and differences between brains and computers of his day.

It is this man that is among the main individuals credited with the architecture 
(named after him) of the 'stored program computer', which was the precursor of our
modern CPUs.

  John von Neumann

  Isaac Newton

  Bill Gates

  Charles Babbage

 5. The Neumann architecture design consists of a Control Unit, Arithmetic and Logic Unit (ALU), Memory Unit, Registers and Inputs/Outputs. One of the main purposes of the CPU is to ...

  output an instruction

  print to the printer

  connect to the internet

  process data

 6. The speed that a CPU works at is measured in _____, Hz. Modern processors often run so fast that gigahertz, GHz, is used instead. One gigahertz is one billion _____.


  miles per hour


  metres per second

 7. The CPU market for desktop (home) computers is controlled by two companies: 1. _____ and Advanced Micro Devices (usually shortened to 2. ______).
Note: There are other CPU manufacturers like ARM, IBM, VIA, MCST, ELVEES, SRISA, NTC 
Module and Sun Microsystems but their CPUs usually have more specific uses (for example 
in mobile phones, cars, game consoles or in the military).

  Microsoft and APPLE

  Intel and AMD


  IpeGix and APPLE

 8. Many CPUs today can do more than 1 billion (1,000,000,000) instructions in a single second. In general, the more a CPU can do in a given time, the faster it is. Read the paragraph below and fill in the blanks.
Some newer processors have ____________ _______. This means that they
have many processors built onto the same chip so that they can
run many instructions at once.

  multiple computers

  many kernels

  many corn-techo-blobs

  multiple cores

 9. Which of the following tasks can a CPU NOT do?
1. Read data from memory and write data to memory.
2. Add one number with another.
3. Test to see if one number is bigger than another.
4. Move a number from one place to another (for example, 
from one register to another or between a register and memory).
5. Jump to another place in the instruction list.
6. Jump to another place in the instruction list but only if some test is 
true (for example, only if one number is bigger than another).
7. Allow programmers to program directly in Python or Java onto the CPU to 
carry out tasks

Even very complicated programs can be made by combining many simple 
instructions like these.

  No. 1 - A CPU cannot read or write. Ridiculous!

  No. 5 and 6 - Jump? Of course a CPU cannot jump to other instructions.

  No. 7 - You cannot code in Python or Java directly onto a CPU - this doesn't make any sense.

  No. 3 - A CPU can definitely not perform arithmetic operations. Only a calculator can do that!

 10. Types of CPUs: read the paragraph below and fill in the blanks.
There are mainly two different types of CPUs used in modern desktop systems: 
___-bit CPUs and ___-bit CPUs. 

The instructions in a 32-bit CPU are good at handling data that is 32 bits 
in size (most instructions 'think' in 32 bits in a 32-bit CPU). Likewise, a 
64-bit CPU. 

The size of data that a CPU handles best is often called the word size of the CPU. 

Many older CPUs from the 70s, 80s and early 90s and some modern small CPUs) have 
an 8-bit or 16-bit word size.

  32 and 64

  1 and 2

  32 and 54

  3 and 6

 11. A CPU is placed on the motherboard. The following diagram shows a labelled motherboard - where would the CPU be placed?





 12. On the motherboard on your computer, the tiny little CPU is often placed underneath a fan (like shown in the image. What is this called and why is it needed?

  heat sink fan: a cooling device which draws heat away from the CPU before it gets damaged

  bus fan: a fan that cools down the wires around the CPU - it is only in place to cool the bus wires

  insect fan: a fan that is in place to stop insects from getting inside the CPU

  heating fan: a heating device that spins around to warm up the computer on a cold day

 13. A Central Processing Unit is also referred to as a microprocessor. True or false?



 14. What common household devices, other than computers, contain microprocessors?
washing	machines 
set-top boxes 
central heating systems 
DVD players

  None of the listed items

  Only washing machines

  Only microwaves

  All of the listed items

 15. Read the excerpt below and decide whether the whole statement about modern CPUs is true or false.
Electronics began with the development of the transistor in the 1950s. Transistors are 
tiny electronic switches and amplifiers. Several thousand transistors can be put on a 
piece of silicon with a surface area of just one square mm.

A modern CPU that would fit in the palm of your hand can contain in excess of 2 billion