Written/Composed by: - SHAHZAD IFTIKHAR Contact # 0313-5665666
Website: www.downloadclassnotes.com , E-mail: raoshahzadiftikhar@gmail.com
COMPUTER SCIENCE FOR 6TH CLASS (UNIT # 1)
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ANSWER / QUESTIONS
Question: Define Computer
A computer is an electronic data processing machine.
Question: Define Data
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Data is the collection of raw facts.
Question: Define Peripheral Devices
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Peripheral devices are those which are attached with a computer.
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Question: Define Scanner
A scanner is an input device. It makes a digital image of the text or picture scanned
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by it.
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Question: What is difference between Data and Information?
Data is the collection of raw facts
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Information is a meaningful form of processed data.
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Question: What is difference between Hardware and Software?
Hardware is all physical parts of computers
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Software is the programs that tell the computer how to work.
Question: What is difference between Hard Disk and CD?
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Hard Disk consists of a set of round metal plates called platters in its drive with
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read/write heads.
CD is round shape plastic disk. It use laser to read and write data.
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Question: What is difference between Scanner and a digital camera?
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A scanner is an input device. It makes a digital image of the text or picture
scanned by it.
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A digital camera makes digital copy of an image and stores it in its memory.
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Question: Why mouse is used with a computer?
Mouse is a small hand held pointing device used to input data.
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Question: Describe the function of a Central Processing Unit?
CPU is the brain of computer.
It carries out processing.
It controls all the operations.
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Written/Composed by: - SHAHZAD IFTIKHAR Contact # 0313-5665666
Website: www.downloadclassnotes.com , E-mail: raoshahzadiftikhar@gmail.com
COMPUTER SCIENCE FOR 6TH CLASS (UNIT # 1)
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Question: Name three storage devices. Write few important features about
each of them
Three storage devices are Floppy Disk, Hard Disk and CD.
Floppy disk is a flexible thin plastic disc used to store data.
Hard Disk consists of a set of round metal plates called platters in its drive with
read/write heads.
CD is round shape plastic disk. It use laser to read and write data.
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Question: What is the use of a keyboard in a computer?
Keyboard is most important input device.
It has keys to type.
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Question: When we need a modem?
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A modem allows computers to communicate with other computers.
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Question: Describe Input Operation
It allows the data to move from input to computers memory for processing.
Question: Describe Processing Operation
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It takes place in the processor.
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This includes arithmetic operations like addition, subtraction, multiplication and
division.
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Question: Describe Output operation
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It translates the computers output and directs it to an output device such as monitor,
printer, speaker etc.
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Question: Describe Storage operation
It sends the data and information to storage for future use.
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