Tttechnology guide 1

Question 1

Hardware consists of

Answer 1

• central processing unit (CPU)
• primary storage
  -secondary storage
  -input and output technologies

Question 2

Computer Hierarchy

Answer 2

1. Supercomputers
2. mainframe computers
3. microcomputers
4. laptops

Question 3

Input technologies

Answer 3

-human data entry: keyboard
- source data automation: barcode scanners, cameras

Question 4

Output Technology

Answer 4

printers, video projectors

Question 5

Central processing unit (CPU)

Answer 5

Central processing unit (CPU) performs the actual
computation or “number crunching” inside any
computer.

Question 6

Parts of micropressor

Answer 6

control unit
aritmetic logic unit
registers

Question 7

Moores Law

Answer 7

The complexity of microprocessors doubles
every 18 months

Question 8

Primary storage

Answer 8

stores small amount of data that the cpu uses immediatley

Question 9

Secondary storage

Answer 9

stores large amounts of data located outside the cpu

Question 10

Four main categories of primary storage

Answer 10

Registers
cache memory
Random access memory
Read-only memory

Question 11

categories of secondary storage

Answer 11

nonvolatile
more time need to retrieve data from ram
cheaper than primary storage

Question 12

Hierarchy of memory capacity

Answer 12

kilobyte: one thousand bytes
Megabyte: one million byte
Gigabytes: 1 billion bytes
Terrabyte: one trillion bytes
Petabytes: one thousand terabytes
Exabyte: one thousand petabytes
Zettabyte: one thousand exabytes