COSC 1301

Review #1 --- Chapters 1, 2

May bring 1 page notes (both sides)

True/False, Multiple Choice questions

Chapter 1 – Intro to Computers

1. Functions of Computers

a. Def. of a computer

b. Four operations of a computer--Input, Processing, Output, Storage

c. Data vs. Information

d. Hardware vs. Software

2. Types of Computers

a. Embedded computers

b. Mobile Devices

c. Personal Computers - desktops, notebooks, netbooks, ultra-mobile PCs

d. Midrange Servers(minicomputers)

e. Mainframe Computers

f. Supercomputers

3. Computer Networks

a. Definition of Network

b. Internet - WWW, ISP, Web page, Web site, Web Server, IP address, URL, email, email address, Web Browser, Search engine, tabbed browsing

c. Computers and Societal Issues

4. Computers and Societal Issues

a. Benefits - medical advances, on-line shopping, finance and investing, technological assistance for physical impairments

b. Risks – Health, Security, Privacy

c. Intellectual property rights – Copyright, trademark, digital watermarks

d. Ethics: Computer ethics vs. business ethics

e. Health issues – repetitive stress injuries(RSI), carpal tunnel syndrome(CTS)

f. Environmental issues – green computing, eco-labels, e-trash

Chapter 2 – Computer Hardware

1. Digital data representation

a. Byte = 8 bits

b. File

c. Prefixes – kilo, mega, giga, tera

2. System Unit

a. Motherboard – Port, power supply

Review #1

b. CPU – Microchip, multi-core CPUs, hertz, clock speed

c. Memory – RAM, bytes, ROM, registers, flash memory

d. Bus – Internal, external, expansion, USB, Firewire

e. Expansion slots and expansion cards

3. CPU operation

a. CPU components – Control unit, ALU/FPU, Decode unit, Prefetch unit, Bus interface unit

b. Cache memory – L1 Internal(to CPU), L2 Internal or External, L3 External

c. Machine cycle – Fetch, Decode, Execute, Store

4. Storage systems

a. Hard Drives –

1) magnetic, cylinder, track, sector, cluster

2) Disk access time – seek time, rotational delay, data movement time

3) Disk cache

b. Optical disk – CD, DVD, Blu-ray

1) Pits/lands, reflects/doesn’t reflect laser beam

2) R or RW

c. Flash memory – solid state (on chips)

1) Embedded – digital cameras, Mobile devices,

2) USB flash drives – USB 2.0, USB 3.0 now available

d. Network Storage and Cloud Storage

1) Remote storage – Network attached storage(NAS), online/cloud storage

e. Smart Cards

f. Storage systems for Large Computer systems – RAID

5. Input devices

a. Keyboard

b. Pointing devices – mouse, trackball, touchpad, stylus, gaming devices

c. Scanners and Readers – barcodes, RFID readers, Optical Mark readers(OMR), Optical Character Recognition(OCR), Magnetic Ink Character Recognition(MICR), Biometric Readers

d. Audio Input – Speech recognition systems

6. Output devices

a. Display devices – CRT, flat-panel display, LCD, LED, Plasma, pixel

b. Projectors

c. Printers – speed is pages per minute(ppm)

1) Laser – toner cartridges

2) Inkjet – ink cartridges

3) Barcode

4) Portable

d. Audio Output