Lessons

 


Introduction to Computers

History of Computers


Review Questions

Answer: "CD-RW" is rewritable while "CD-R" is write once Question: Are scanners input or output devices? Answer: Input Devices Question: What does LCD stand for? Answer: Liquid Crystal Display
used in Flat Panels, portable computers, screens of digital cameras Question: What is the DVD-RAM? Answer: It is the rewritable form of DVDs Question: What is the maximum capacity of the DVD-ROM? Answer: 17 GB Question: What is the capacity of the DVD-RAM? Answer: 5.2 GB Question: What is the capacity of the CD-ROM, CD-i, CD-R, and CD-RW? Answer: 650 MB Question: What is the capacity of the Floppy Disk? Answer: 1.44 when formatted Question: What is the capacity of the Super Disk invented by 3M? Answer: 120 MB Question: What is the capacity of the HiFD invented by Sony? Answer: 200 MB Question: What is TFT? Answer: TFT stands for Thin Film Transistor
and It's the best type of LCD monitors Question: What is the difference between bit and byte? Answer: 1 byte = 8 bits = 1 character Question: What are development software programs? Answer: They are programming software ex: MS Visual C++, MS Visual Basic,... Question: What is the main function of the Operating System? Answer: It controls both the hardware and software Question: The size of a disk refers to:
radius, diameter, capacity, or perimeter of the disk Answer: The size of a disk refers to it diameter Question: In what unit is the MODEM speed measured? Answer: Kbps - Kilobit per second Question: What does RAM stand for? Answer: Random Access Memory Question: What does ROM stand for? Answer: Read Only Memory Question: What does DVD stand for? Answer: Digital Versatile Disc or Digital Video Disc Question: What does HTML stand for? Answer: Hypertext Markup Language Question: What does CRT stand for? Answer: Cathode Ray Tube Question: What does DPI stand for? Answer: Dot Per Inch
It's used to measure the resolution of printers and scanners ">

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