Questions and Answers
What is the main characteristic of a computer as described in the text?
Ultra-fast processing speed
Which unit is commonly used to measure the speed of a computer's internal operations?
Nanosecond
What is the main reason for errors in computing according to the text?
Inaccurate data
Which trend is NOT mentioned in the text as a characteristic of Information and Communication Technology (ICT)?
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What type of machine is a computer according to the text?
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Which speed unit is used to measure the incredibly fast internal speed of a powerful computer performing addition of large numbers?
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What is the main difference between data and information?
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Which of the following describes operational information?
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What are the desirable qualities of information according to the text?
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How is information classified based on its purpose?
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What makes a piece of data become information?
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In the context of systems, what is the role of daily receipts, invoices, and payslips as mentioned in the text?
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What is the key difference between analog computers and digital computers?
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Why is it important to properly connect computer cables?
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What does 'hybrid computer' refer to?
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Why is giving proper care to the device essential according to the text?
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What defines special purpose computers?
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Why is compatibility to peripherals important for a computer system?
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Study Notes
Information and Communication Technology Trends in ICT
- Increase in raw computing power
- Increase in storage capacity
- Increasing diversity
- Falling prices
- Increasing functionality and flexibility
- Increasing user-friendliness
- Improved connectivity
Characteristics of a Computer
- Speed: electronic, high-speed calculator, units of speed are microsecond, nanosecond, and picosecond
- Accuracy: high, errors are due to human weaknesses, not technological weaknesses
Characteristics of a Computer (continued)
- Storage: can store a large amount of data permanently
What is Data?
- A collection of independent raw facts, numbers, letters, symbols
- Refers to the facts and figures relating to events that take place
- Refers to things “known”
What is Information?
- Data made meaningful based on user needs through manipulation
- Desirable qualities: relevance, completeness, accuracy, cost-effectiveness, timeliness
Classifications of Information
- Operational Information: daily details for running an organization
- Management Information: for managing planning, organizing, and controlling an organization
- Strategic Information: mission critical, relates to the organization's thrust
Data versus Information
- Data: collection of facts in forms of numbers, letters, special symbols, or combinations
- Information: data that has been organized and processed to become meaningful
What is a System?
Why Computers Sometimes Fail
- Input Errors or Errors in Instructing a Computer
- Communication Gap
- Improper Control
- Lack of Standard
Types of Computer
- Digital computer
- Main frame computer
- Micro computer
- Home PC
- Analog computer
- Super Computer
- Hybrid Computer
- Mini Computer
Classifications of Computer
- Based on operating principles: Analog computers, Digital computers, Hybrid computers
- Based on applications: General purpose computers, Special purpose computers
- Based on size and capability
