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Questions and Answers
The first 6 letters at the top of a normal keyboard spell QWERTY.
True
The Caps Lock key is used to type alphabets in lower case letters.
False
Pressing CTRL and C is a shortcut used for cutting text.
False
The Backspace key is used to delete forward in a document.
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Pressing the Windows button together with the letter E takes us to the desktop.
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The Alt key is used to perform second functions of keys it is pressed simultaneously with.
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The CPU stands for Central Process Unit.
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A mouse is a hand-held pointing or controlling device used for keyboard input on a computer screen.
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The CPU consists of the Arithmetic and Logic Unit, Control Unit, and Virtual Memory.
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Right-clicking with a mouse is used to display the menu for the specific object or item selected.
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Normal CPU speeds range between 2GHz to 3GHz.
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The Windows button on a keyboard is used to turn off the computer.
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An operating system controls the basic components of a computer.
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Modern operating systems use only text-based interfaces.
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To copy and paste in text-based interfaces, users had to type long command lines.
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Antivirus software is designed to detect and remove legitimate computer programs.
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Examples of antivirus software include Avira, Avast, and Kasperkey.
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A mouse is a computer component responsible for controlling basic computer functions.
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Study Notes
Keyboard Functions
- The standard keyboard layout is called QWERTY, named after the first six keys in the top left letter row.
- Shortcuts are combinations of keys pressed together to perform specific operations, such as:
- Copy: CTRL + C
- Cut: CTRL + X
- Paste: CTRL + V
- Undo: CTRL + Z
- Keyboard functions include:
- Alphabet keys: type letters A-Z
- Number keys: type numbers 0-9
- Caps Lock key: switch to uppercase letters
- Space Bar: create a space between words
- Backspace: delete backwards
- Delete: delete forwards
- Escape: cancel current action
- Arrow keys (Left, Right, Up, Down): move cursor in a document
- Page Up and Page Down: navigate through a document
- Windows button: access the Windows menu
- Shift: perform secondary function of another key
- Alt: perform secondary function of another key
- Ctrl: perform secondary function of another key
- Tab: create a space equal to 8 spacebar presses
Mouse Functions
- A mouse is a handheld pointing device used to select and drag items on a computer screen.
- Mouse functions include:
- Point: place emphasis on an item on the screen
- Left click: select an item
- Double click: select and activate an item
- Left click and drag: move an item to a new location
- Right click: display the menu for a selected item
CPU and System Unit
- The Central Processing Unit (CPU) is the main processing device in a computer.
- The system unit consists of the CPU, RAM, ROM, expansion slots, and the motherboard.
- CPU speeds are measured in GHz, with normal speeds ranging from 3GHz to 4.5GHz.
- The CPU consists of three main parts:
- Arithmetic and Logic Unit: performs mathematical and logical operations
- Control Unit: controls incoming instructions and executes them
- Cache Memory: stores frequently used data
Software
- System software deals with the functioning and maintenance of a computer.
- Examples of system software include:
- Operating systems (e.g., Microsoft Windows, Apple iOS, Android)
- Antivirus software (e.g., Avira, Avast, Kasperkey)
- Driver programs
- Application software is used by end-users for entertainment and productivity purposes.
- Examples of application software include:
- Open source software
- Freeware
- Shareware
- Proprietary software
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Description
Test your knowledge on keyboard shortcuts which help perform operations like cut, copy, paste, and undo using combinations of keys such as CTRL + C, CTRL + X, CTRL + V, CTRL + Z, and more.
