Which of the following keys of keyboard are called modifier keys? a) Ctrl b) Shift c) End d) Alt Choose the correct option from those given below:
a, b and d
Understanding Keyboard Modifier Keys
The question asks us to identify which keys from the given list are considered modifier keys on a keyboard. Modifier keys are special keys that alter the function of another key when pressed in combination with it.
Identifying Modifier Keys from the List
Let's look at the keys provided and determine if they are modifier keys:
- a) Ctrl (Control): Yes, Ctrl is a common modifier key. It is used in combinations like Ctrl+C (copy) or Ctrl+V (paste) to change the action of the C or V key.
- b) Shift: Yes, Shift is a modifier key. It is used to type uppercase letters or the symbols above the numbers and punctuation marks. For example, pressing Shift+A types 'A'.
- c) End: No, End is primarily a navigation or editing key. It is used to move the cursor to the end of a line or document, not typically to modify the function of another key.
- d) Alt (Alternate): Yes, Alt is a modifier key. It is used in combinations like Alt+Tab (switch windows) or Alt+F4 (close window) to perform specific actions.
Based on this analysis, the modifier keys among the options are Ctrl, Shift, and Alt.
Summary of Keys
| Key | Type | Description |
|---|---|---|
| Ctrl | Modifier Key | Used with other keys to perform actions (e.g., copy, paste). |
| Shift | Modifier Key | Used with letter keys for uppercase, or with number/symbol keys for alternative characters. |
| End | Navigation/Editing Key | Moves cursor to end of line/document. Not a modifier key. |
| Alt | Modifier Key | Used with other keys to access menus or perform system actions (e.g., close window, switch apps). |
The keys that are considered modifier keys from the given list are Ctrl, Shift, and Alt. This corresponds to options a, b, and d.
Revision Table: Common Keyboard Keys
| Key Category | Examples | Purpose |
|---|---|---|
| Modifier Keys | Ctrl, Shift, Alt, Fn, Windows Key (often) | Change the function of other keys when pressed together. |
| Typing Keys | Letters (A-Z), Numbers (0-9), Symbols (!, @, #, etc.) | Input characters and symbols. |
| Function Keys | F1, F2, ... F12 | Perform specific tasks depending on the program. |
| Navigation Keys | Arrow keys, Home, End, Page Up, Page Down | Move cursor or scroll through documents/pages. |
| Control Keys | Esc, Print Screen, Scroll Lock, Pause/Break | Perform various system or program-specific commands. |
Additional Information on Modifier Keys
Modifier keys are fundamental to keyboard shortcuts. They allow a limited number of keys to perform a vast range of functions. Different operating systems and applications use modifier keys in various combinations.
- Ctrl Key: Widely used for editing commands (copy, cut, paste, undo, redo) and many other shortcuts in applications.
- Shift Key: Used for capitalization and accessing secondary functions of keys. Also used in combinations for navigation (e.g., Shift+End to select text to the end of a line).
- Alt Key: Often used to access menu bar options (e.g., pressing Alt highlights menu options) or for system-level shortcuts.
- Windows Key / Command Key (on Mac): These are also considered modifier keys, often used for system shortcuts like opening the Start menu or launching applications.
- Fn Key: Found on many laptops, this key is a modifier used to access secondary functions printed on function keys or other keys (e.g., volume control, screen brightness).
Understanding modifier keys and their common combinations significantly improves efficiency when using a computer.
Important Questions from Computer Literacy
Arrange the following computer memory types from fastest to slowest speed:
(A) Hard Disk
(B) Main Memory (RAM)
(C) CD-ROM
(D) CPU Registers
(E) Cache Memory
Choose the correct answer from the options given below :
RAM is placed on
- Google Chrome and Mozilla Firefox are examples of
Which of the following represents the second phase in the traditional Systems Development Life Cycle (SDLC), typically following the preliminary investigation?
Which of the following is not considered as a form of secondary storage?
