Session 12

Question 1

Computer History **

Answer 1

1890: Punch Card Accountant
1940: ENIAC- the first actual computer, military purpose (to crack the code + projectile the landing)
1950: Electronic Accounting Machine (very limited memory- Engineer needs to replace, only big accounting firms used)
2000: The PC Era- Personal computer relevant
2010: Handheld/mobile (computers taking variety of roles)

Question 2

Anatomy of a Computer **

Answer 2

CPU= Brain
Memory= sketchpad, whiteboard
Hard drive= memory
input devices (mouse, keyboard, microphone, touch screen) =senses
Output devices (monitor, printer, speaker)= communication and expression. 
Motherboard= Backbone 
PSU (Power Supply Unit)=Circularly system

Question 3

Binary & Decimal Systems ***

Answer 3

Byte (8-bites)
Word (16-bites, 2 bytes)
1 word= 8 bites or 1 byte 
Right to Left 
(2^0-2^7). Start bottom up, Odd=1, even= 0

Question 4

Kb, Mb, GB & Beyond **

Answer 4

8 bites= 1 byte  (1 letter alphabet)
1000 B= 1 KB (page of type)
1000 KB= 1 MB (50 shades)
1000MB = 1 GB (DVD)
= 1 TB (library of congress)
=1 PB (library of congress)
=1 EB(10billion copies of Economist)
=1 ZB (total amount of info. of info existed) 
=1 YB (too big to imagine)

Question 5

Data Organization Hierarchy

Answer 5

Database- File- Record- Field- Byte- Bit