Questions and Answers
What is the primary function of a computer?
Process information
Which type of data is considered processed and meaningful?
Text
In the example given, what does the collection of Sally's exam results represent?
Data
Which component of a computer is responsible for following specified rules to process data?
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What happens to the data once it has been processed by a computer?
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Which best describes the relationship between data and information in a computer system?
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What component of a computer is responsible for displaying text, graphics, and video on a screen?
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Which device is used to record and retrieve data stored on physical material like CDs and DVDs?
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Which component of a computer is connected to a circuit board known as the 'motherboard'?
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What is an advantage of using computers related to their speed?
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Which device is responsible for producing text and graphics on paper?
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What type of device is used to communicate wirelessly with other devices?
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What type of hardware component allows you to enter data/instructions into the computer?
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Which hardware component conveys information to one or more people?
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What is the function of the system unit in a computer?
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Which device records and retrieves items to and from storage media?
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What type of hardware component enables a computer to send and receive data to and from other computers?
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In the context of the text, what is the purpose of output devices?
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What type of computers are intended to be used by one person at a time?
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Which category of computers is designed to be portable and carried from place to place?
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What type of computing device is small enough to hold in your hand?
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Which type of computer fits on a desk and is intended for personal use?
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What size of equipment occupies a partial room to a full room?
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Which architecture includes popular models from PC and Apple brands?
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What is the main function of servers?
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How many computers and devices can a server typically support at the same time?
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What distinguishes a mainframe computer from other types of servers?
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Why do enterprises use mainframes in their operations?
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What makes supercomputers unique compared to other types of computers?
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'Applications requiring complex, sophisticated mathematical calculations' are typically run on which type of computer?
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Study Notes
What is a Computer?
- A computer is an electronic device that can accept data, process the data according to specified rules, produce results/information, and store the results/information for future use.
Data and Information
- Data is a collection of unprocessed items, which can include text, numbers, pictures, audio, and video.
- Information is processed data that has meaning and is useful.
Components of a Computer
- Input Devices: allow entering data/instruction into the computer (e.g. keyboard, mouse, microphone)
- Output Devices: convey information to one or more people (e.g. printer, monitor, speakers)
- System Unit: contains electronic components used to process data (e.g. motherboard, circuit board)
- Storage Devices: record/retrieve items to/from storage media (e.g. hard disk, USB flash drive)
- Communication Devices: enable sending/receiving data/instructions/info to/from another computer(s) (e.g. modem, router, network card)
Advantages of Using Computers
- Speed: perform billions/trillions of calculations per second
- Reliability: electronic components have a low failure rate
- Consistency: produce consistent results given the same input and process
Categories of Computers
- Personal Computer: designed for individual use, can perform all input, processing, output, and storage activities by itself
- Mobile Computer: a portable personal computer, designed to be carried from place to place (e.g. laptop, tablet)
- Mobile Device: a computing device small enough to be held in one's hand
- Game Consoles: designed for playing games
- Servers: manage access to hardware, software, and resources on a network
- Mainframes: large, powerful servers that can handle hundreds/thousands of connected users simultaneously
- Supercomputers: the fastest, most powerful computers, capable of processing many trillions of instructions per second
- Embedded Computers: specialized computers used in specific devices (e.g. traffic lights, appliances)
- Terminal: a device that allows users to access a remote computer or system
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