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Questions and Answers
What are the three basic operations of a computer?
What are the three basic operations of a computer?
- Input, Output, Transfer
- Input, Store, Retrieve
- Process, Output, Store
- Input, Process, Output (correct)
Which component is NOT part of the constituents of a computer system?
Which component is NOT part of the constituents of a computer system?
- Human ware
- Software
- Network Protocols (correct)
- CPU
What characteristic of computers allows them to perform tasks quickly?
What characteristic of computers allows them to perform tasks quickly?
- Multitasking
- Speed (correct)
- Storage Capacity
- Versatility
Which of the following statements best defines a computer system?
Which of the following statements best defines a computer system?
Which of the following is NOT an operation of data processing?
Which of the following is NOT an operation of data processing?
What does 'Human ware' refer to in a computer system?
What does 'Human ware' refer to in a computer system?
What aspect of computers allows them to process data in real-time?
What aspect of computers allows them to process data in real-time?
Which of the following best describes the CPU's role in a computer system?
Which of the following best describes the CPU's role in a computer system?
What is the primary function of system software?
What is the primary function of system software?
Which of the following is NOT a type of system software?
Which of the following is NOT a type of system software?
Which example demonstrates utility software?
Which example demonstrates utility software?
What role do device drivers play in system software?
What role do device drivers play in system software?
How do translators function in the context of system software?
How do translators function in the context of system software?
Which of the following best describes application software?
Which of the following best describes application software?
What characteristic distinguishes system software from application software?
What characteristic distinguishes system software from application software?
Which of the following is an example of an operating system?
Which of the following is an example of an operating system?
Which type of keyboard was specifically designed to slow down typists?
Which type of keyboard was specifically designed to slow down typists?
What is the primary function of the function keys on a keyboard?
What is the primary function of the function keys on a keyboard?
Which keyboard layout is commonly used in French-speaking countries?
Which keyboard layout is commonly used in French-speaking countries?
What was John Napier known for inventing?
What was John Napier known for inventing?
Which arrangement on the keyboard includes the most commonly used letters?
Which arrangement on the keyboard includes the most commonly used letters?
What principle did Napier's bones primarily utilize?
What principle did Napier's bones primarily utilize?
How are the keys on a keyboard generally categorized?
How are the keys on a keyboard generally categorized?
Which machine is considered the first calculating device according to historical context?
Which machine is considered the first calculating device according to historical context?
What is the standard arrangement of letters on a keyboard known as?
What is the standard arrangement of letters on a keyboard known as?
What challenge did the ratchet mechanism of Pascal's calculator face?
What challenge did the ratchet mechanism of Pascal's calculator face?
What does the numerical keypad on a keyboard primarily facilitate?
What does the numerical keypad on a keyboard primarily facilitate?
What was the primary function of the Leibniz Multiplier, also known as the Stepped Reckoner?
What was the primary function of the Leibniz Multiplier, also known as the Stepped Reckoner?
What type of keyboard typically has more advanced features compared to a standard keyboard?
What type of keyboard typically has more advanced features compared to a standard keyboard?
What type of device were machines like Pascal's calculator primarily considered?
What type of device were machines like Pascal's calculator primarily considered?
Which feature distinguished Napier's bones from more modern calculating devices?
Which feature distinguished Napier's bones from more modern calculating devices?
What was the primary motivation behind Pascal inventing his calculator?
What was the primary motivation behind Pascal inventing his calculator?
What is the main purpose of antivirus software?
What is the main purpose of antivirus software?
Which of the following is NOT a recommended computer virus prevention tip?
Which of the following is NOT a recommended computer virus prevention tip?
What does on-demand scanning refer to?
What does on-demand scanning refer to?
Which of the following is an example of a potential source of a computer virus?
Which of the following is an example of a potential source of a computer virus?
What is one of the effects of a computer virus?
What is one of the effects of a computer virus?
What is real-time scanning also known as?
What is real-time scanning also known as?
Which antivirus example is known for providing security services alongside a firewall?
Which antivirus example is known for providing security services alongside a firewall?
What action can be taken to help correct a computer threat?
What action can be taken to help correct a computer threat?
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Study Notes
Computer Systems
- A computer system is made up of interconnected parts working together to achieve a common output.
- Consists of hardware, software, and humanware.
Hardware - The physical components of a computer system.
- Examples include:
- CPU (Central Processing Unit): The brain of the computer, responsible for processing data.
- Memory: Stores data and instructions temporarily.
- Input Devices: Allow users to interact with the computer system.
- Output Devices: Display processed data.
Software - The set of instructions that tell the hardware what to do.
- Two main types of software:
- System Software: Manages the computer system itself. Examples include:
- Operating systems (e.g., Windows, macOS, Linux).
- Device drivers: Control specific peripherals.
- Utility software: Helps analyze, configure, or maintain the computer system.
- Application Software: Performs specific tasks for the user. Examples include:
- Word processors (e.g., Microsoft Word, Google Docs).
- Spreadsheets (e.g., Microsoft Excel, Google Sheets).
- Games.
- System Software: Manages the computer system itself. Examples include:
Characteristics of Computer Systems
- Speed: Computers operate at extremely high speeds because they use electronic signals that travel at the speed of light.
- Accuracy: Computers are able to produce accurate results.
- Versatility: Computers can be used for a wide variety of tasks.
- Diligence: Computers can work continuously without getting tired.
- Storage: Computers can store large amounts of data.
Input Devices
- Keyboards : Used to input text and commands, come in various layouts (QWERTY, AZERTY, DVORAK).
- Mice: Used to control a cursor on the screen, enabling navigation and selection.
- Scanners: Input images or documents into the computer system.
- Microphones: Used to record audio.
- Other Examples: Card readers, light pens, digital cameras.
Computer Viruses
- Malicious software that can harm a computer system.
- Sources of Viruses:
- Infected external storage media.
- Network connections.
- The Internet.
- Effects of Viruses:
- Slow computer performance.
- Display unfamiliar text.
- Clog network connections.
- Impair data storage.
- Disrupt booting processes.
- Damage installed programs.
Computer Antivirus Software
-
Designed to protect computer systems from viruses.
-
Functions:
- Scan for viruses.
- Quarantine infected files.
- Remove viruses.
-
Types of Scans:
- On-demand scanning: Manually initiated by the user.
- On-access scanning: Continuously monitors for threats.
-
Examples of Antivirus Software:
- Dr. Solomon tool kit.
- Smadav.
- AVG.
- C.A Antivirus.
- Norton.
- Sophos.
- F-secure.
- Avira.
- Eset.
- E-scan.
- Komodo.
- Kaspersky.
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