Inside the Computer, Storage, Software (Chapter 4, 5 and 2)
Understanding Hardware and Software
Objectives 7.1.2, 7.2 – 7.7.4, 9.4-9.6
The system unit contains ___________________________________________________________
Motherboard contains _____________________________________________________________
Expansion Cards give the computer added capability. Examples:
Expansion cards plug into __________________________________________ on the motherboard.
Ports- sockets that peripheral devices plug into; an interface used to connect a device. Examples:
Processor Speeds for modern computers range from:
| |Abbr |No. of Bytes |Where measure is used {will complete in-class} |
| |b |1/8th | |
|Byte |B |1 |1 character |
| |KB | |1. Text file Size |
| | | |2. Small image |
| | | |3. |
| |MB | |1. CD – 700 MB |
| | | |2. |
| | | |3. |
| |GB | |1. |
| | | |2. |
| | | |7 minutes of HD-TV video (1GB) |
| |TB | |1. |
|Petabyte |PB |250 bytes |Supercomputer hard disk size |
|(Quadrillion) | |1,024 TB |13.3 years of HD-TV video (1PB) |
Memory Types
1. _____________________ – loses its contents when electrical power is lost
-
-
2. ______________________ – retains its contents even when electrical power is lost
- ROM
- PROM
-
Bus: electrical pathway used to move data and instructions between system components
A Programmer writes programs, a user runs programs.
Two basic types of software and their purpose: Give examples of each.
1. ______________________ designed to allow the user to perform tasks. Examples:
2. ______________________ interacts directly with the hardware: operating system(OS), drivers, utilities
Match the following software types to the definitions: Beta version, Freeware, Open Source, Shareware
___________________ – copyrighted software you can get free. Examples:
___________________ – Programs still under development
___________________ – SW that allows users to run it for a limited time free of charge. Ex:
___________________ – free to use and change the source code if changes are distributed at no cost. Ex:
Secondary Storage, also called _mass storage________________ is a means of electronically storing data.
Two types of Secondary Storage and how bits are represented:
1._____________________-1’s and 0’s are represented as the presence or absence of _a magnetized spot___
2._____________________- 1’s and 0’s are represented by pits and lands. Created using a ______________
Storage capacities vary by type. Which are magnetic and which are optical?
|Media |Media Type |Storage Capacity |
|Name |Magnetic or Optical | |
| Floppy Diskette |Magnetic | 1.44 MB |
| CD | | 700 MB, 650 MB, 210 MB mini |
| DVD | | 4.7GB – 17.08GB |
|Blu-ray | |25GB – 50 GB |
|Hard Drive | | |
| | | |
Data Compression - A means of reducing the amount of space or bandwidth needed to store or transmit a block of data.
1. Loseless – no bits are lost
2. Lossy - some bits are lost
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