Podcast
Questions and Answers
The first 6 letters at the top of a normal keyboard spell QWERTY.
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.
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.
Pressing CTRL and C is a shortcut used for cutting text.
False
The Backspace key is used to delete forward in a document.
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.
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.
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.
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.
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.
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.
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.
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.
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.
An operating system controls the basic components of a computer.
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Modern operating systems use only text-based interfaces.
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.
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.
Antivirus software is designed to detect and remove legitimate computer programs.
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Examples of antivirus software include Avira, Avast, and Kasperkey.
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.
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.
