Interesting Computer Facts

1)Over 6,000 new computer viruses are released every month.

2)The first computer mouse, constructed in 1964, was made out of wood.(by Doug Engelbart)

3)The average human being blinks 20 times a minute – but only 7 times a minute when using a computer.

4)The first electro-mechanical computer was developed in 1939.

5)Over 1 million domain names are registered every month.

6)The first hard drive was created in 1979 and could hold 5MB of data.

7)The nVidia GeForce 6800 Ultra video card contains 222 million transistors.

8)20% of online viruses are released by organized crime units.

9)The engineers who developed the IBM PC were known as “The Dirty Dozen”

ANSWERS ..

Answer: QUIZ 1
1-C
2-D
3-C
4-D
5-A

QUIZ 2

1-B
2-C
3-A
4-C
5-C

QUIZ 3
1-D
2-B
3-D
4-C
5-A

QUIZ4
1-D
2-A
3-B
4-C
5-B

QUIZ5
1-B
2-D
3-A
4-B
5-A

QUIZ6
1-C
2-A
3-B
4-C
5- A

List of Common HTML Error Codes

Code	Description	Comment
100	Continue
101	Switching Protocols
200	OK	Action completed successfully
201	Created	Success following a POST command
202	Accepted	The request has been accepted for processing, but the processing has not been completed.
203	Partial Information	Response to a GET command, indicates that the returned meta information is from a private overlaid web.
204	No Content	Server has received the request but there is no information to send back.
205	Reset Content
206	Partial Content	The requested file was partially sent.   Usually caused by stopping or refreshing a web page.
300	Multiple Choices
301	Moved Permanently	Requested a directory instead of a specific file.   The web server added the filename index.html, index.htm, home.html, or home.htm to the URL.
302	Moved Temporarily
303	See Other
304	Not Modified	The cached version of the requested file is the same as the file to be sent.
305	Use Proxy
400	Bad Request	The request had bad syntax or was impossible to be satisified.
401	Unauthorized	User failed to provide a valid user name / password required for access to file / directory.
402	Payment Required
403	Forbidden	The request does not specify the file name. Or the directory or the file does not have the permission that allows the pages to be viewed from the web.
404	Not Found	The requested file was not found.
405	Method Not Allowed
406	Not Acceptable
407	Proxy Authentication Required
408	Request Time-Out
409	Conflict
410	Gone
411	Length Required
412	Precondition Failed
413	Request Entity Too Large
414	Request-URL Too Large
415	Unsupported Media Type
500	Server Error	In most cases, this error is a result of a problem with the code or program you are calling rather than with the web server itself.
501	Not Implemented	The server does not support the facility required.
502	Bad Gateway
503	Out of Resources	The server cannot process the request due to a system overload.  This should be a temporary condition.
504	Gateway Time-Out	The service did not respond within the time frame that the gateway was willing to wait.
505	HTTP Version not supported

Quiz 6

 

Q11) If a large business is going to use a single computer to execute many programs for hundreds (possibly thousands) of users at the same time, performing relatively simple operations and transactions, the type of computer will probably be a(n):
 
A.) Supercomputer.
B.) PC.
C.) Mainframe.
D.) ISP.

Q12) A scientific institution performing intensive mathematical operations for a complex model that requires extremely powerful computing capabilities will most likely use a(n):
 
A.) Supercomputer.
B.) PC.
C.) Mainframe.
D.) ISP.

Q13) The standard computer keyboard is configured using the ____________ layout.
 
A.) Dvorak
B.) QWERTY
C.) Control
D.) Dot-matrix

Q14) The most commonly used keys in the Dvorak keyboard layout are located in the:
 
A.) Far right area of the keyboard.
B.) Top row.
C.) Middle row.
D.) Function key area.

Q15) On computers using Microsoft Windows XP, holding the Windows key down and pressing the letter E will:
 
A.) Start Windows Explorer.
B.) Display the Start menu.
C.) Execute Microsoft Windows.
D.) Run Windows Help.

Quiz 5

Q6) What is the correct association between a hardware component and a computer function?
 
A.) Monitor > input
B.) Mouse > input
C.) CPU > storage
D.) Hard disk > processing

Q7) The main difference between application and system software is that:
 
A.) Application software is composed of program instructions but system software is not.
B.) Application software is stored in memory whereas system software is only in the CPU.
C.) System software is unnecessary whereas application software must be present on the computer.
D.) System software manages hardware whereas application software performs user tasks.

Q8) A document created in a word processing program or a budget created in a spreadsheet are both examples of documents created in:
 
A.) Application software.
B.) System software.
C.) An operating system.
D.) A Windows platform.

Q9) Which of the following is an example of system software?
 
A.) Word processor
B.) Operating system
C.) Management information system
D.) Spreadsheet

Q10) The term that refers to computers that provide resources to other computers in a network is:
 
A.) Server.
B.) Mainframe.
C.) Platform.
D.) Resource provider.

Quiz 4

Q1) The metal or plastic case that houses the physical components of a computer together is called the:

A.) Central Processing Unit.
B.) Storage Device.
C.) Mother Board.
D.) System Unit.

Q2) The “brains” of the computer which executes the instructions, is called the:
 
A.) CPU.
B.) RAM.
C.) MotherBoard.
D.) System unit.

Q3) Instructions and data that are about to be processed by the CPU are located in:
 
A.) A CD-ROM.
B.) RAM.
C.) The Hard Disk.
D.) The Mother Board.

Q4) The circuitry that includes the CPU and memory chips is located on the:
 
A.) System Unit.
B.) Operating System.
C.) Mother Board.
D.) Computer Platform.

Q5) All of the following are considered to be storage devices EXCEPT a:
 
A.) Floppy Disk.
B.) CPU.
C.) CD.
D.) Hard Disk Drive.

FULL FORMS OF COMPUTER RELATED TERMS

* HTTP - Hyper Text Transfer Protocol.
* HTTPS - Hyper Text Transfer Protocol Secure. 
* IP - Internet Protocol.
* URL - Uniform Resource Locator.
* USB - Universal Serial Bus.
* VIRUS - Vital Information Resource Under Seized.
* 3G - 3rd Generation. 
* GSM - Global System for Mobile Communication.
* CDMA - Code Divison Multiple Access.
* UMTS - Universal Mobile Telecommunication  System.
* SIM - Subscriber Identity Module. 
* AVI = Audio Video Interleave
* RTS = Real Time Streaming
* SIS = Symbian OS Installer File
* AMR = Adaptive Multi-Rate Codec
* JAD = Java Application Descriptor
* JAR = Java Archive 
* JAD = Java Application Descriptor
* 3GPP = 3rd Generation Partnership Project
* 3GP = 3rd Generation Project
* MP3 = MPEG player lll
* MP4 = MPEG-4 video file
 * AAC = Advanced Audio Coding
* GIF = Graphic Interchangeable Format
* JPEG = Joint Photographic Exper tGroup
* BMP = Bitmap
* SWF = Shock Wave Flash 
* WMV = Windows Media Video
* WMA = Windows Media Audio
* WAV = Waveform Audio
* PNG = Portable Network Graphics
* DOC = Document (Microsoft Corporation) 
* PDF = Portable Document Format
* M3G = Mobile 3D Graphics
* M4A = MPEG-4 Audio File
* NTH = Nokia Theme (series 40)
* THM = Themes (Sony Ericsson)
* MMF = Synthetic Music Mobile Application File
* NRT = Nokia Ringtone
* XMF = Extensible Music File
* WBMP = Wireless Bitmap Image
* DVX = DivX Video
* HTML = Hyper Text Markup Language 
* WML = Wireless Markup Language
* CD - Compact Disk.
* DVD - Digital Versatile Disk.
* CRT - Cathode Ray Tube.
* DAT - Digital Audio Tape.
* DOS - Disk Operating System. 
* GUI - Graphical User Interface.
* HTTP - Hyper Text Transfer Protocol.
* IP - Internet Protocol.
* ISP - Internet Service Provider.
* TCP - Transmission Control Protocol.
* UPS - UninterruptiblePower Supply. 
* HSDPA - High Speed Downlink Packet Access.
* EDGE - Enhanced Data Rate for GSM [Global System for Mobile Communication]  Evolution.
* VHF - Very High Frequency. 
* UHF - Ultra High Frequency.
* GPRS - General Packet Radio Service.
* WAP - Wireless Application Protocol.
* TCP - Transmission Control Protocol .
* ARPANET - Advanced Research Project Agency Network. 
* IBM - International Business Machines.
* HP - Hewlett Packard.
* AM/FM - Amplitude/ Frequency Modulation.
* WLAN - Wireless Local Area Network

Quiz 3

Q1. The type of output device that utilizes a fluorescent panel for generating light waves is a(n):
A. CRT monitor.
B. inkjet printer.
C. laser printer.
D. LCD monitor.


Q2. The main advantage of active matrix over passive matrix technology is that active matrix panels:
A. have higher screen resolution.
B. can selectively recharge individual pixels.
C. cost less than passive matrix panels.
D. require less power consumption than passive matrix panels.


Q3. The following are all advantages of LCD over CRT monitors EXCEPT:
A. wider viewing area relative to size of the monitor.
B. less likely to cause eyestrain.
C. more friendly to the environment.
D. wider viewing angle.


Q4. The fastest and quietest type of printer is a(n):
A. dot-matrix printer.
B. inkjet printer.
C. laser printer.
D. plotter.


Q5. The type of large printer that can most accurately produce images requiring precise, continuous lines is a(n):
A. plotter.
B. inkjet printer.
C. laser printer.
D. dot-matrix printer.

Quiz 2

Q1. The flicker effect of a cathode ray tube is controlled by its:
A. resolution.
B. refresh rate.
C. dot pitch.
D. data transfer rate.


 


Q2. A monitor with high dot pitch will have:
A. a relatively large number of pixels.
B. a high number of possible colors in its display.
C. wide gaps between pixels.
D. relatively fast recharging of the pixels’ illumination.


Q3. The larger the number of pixels of a computer monitor, the higher its:
A. resolution.
B. refresh rate.
C. dot pitch.
D. data transfer rate.


Q4. The maximum complete electron scans of current CRT monitors is ____________ times per second.
A. 25
B. 50
C. 75
D. 100


Q5 Electron beam scanning is a characteristic of:
A. laser printers.
B. flat panel monitors.
C. cathode ray tubes.
D. liquid crystal display.

Quiz 1

Q1. The insert, caps lock, and num lock keys are all examples of ____________ keys.
A. control
B. function
C. toggle
D. shortcut



Q2. The copy, cut, and paste features use keyboard shortcuts with the ____________ key and a keyboard letter.
A. Shift
B. Windows
C. Alt
D. Ctrl


Q3. RF keyboards differ from infrared keyboards in that they:
A. must be closer to the computer.
B. are connected to the computer via the USB port.
C. do not need to be pointed at the computer.
D. are used primarily on laptops or PDAs.


Q4. The traditional mouse requires a mouse pad to provide friction for its:
A. touchpad.
B. tracker.
C. optical sensor.
D. rollerball.


Q5. The standard input device for a PDA is a:
A. stylus.
B. touch pad.
C. keyboard.
D. trackball mouse.