I/O Devices: Keyboard MCQs Quiz | Class 9
This is a multiple-choice quiz for Class 9 students studying Computer Applications (Code 165), Unit 1: Basics of Information Technology. This quiz focuses on the topic of the Keyboard, covering its role as an input device, its various keys, and basic operations. Attempt all questions, click “Submit Quiz” to see your score, and then download your answers in PDF format.
Understanding the Keyboard
The keyboard is one of the most fundamental input devices used with a computer. It allows a user to input text, numbers, and commands into the computer system. A standard keyboard layout, known as QWERTY, is designed for efficiency and ease of use. Understanding its different keys and functions is a basic and essential skill in computer literacy.
Key Categories and Their Functions
The keys on a keyboard are not all the same; they are grouped into categories based on their function.
- Alphanumeric Keys: These include the letter keys (A-Z) and number keys (0-9). They are the primary keys used for typing text and numbers.
- Modifier Keys: These keys work in combination with other keys to perform special actions. The most common modifier keys are Shift, Ctrl (Control), and Alt (Alternate). For example, pressing Shift along with a letter key types an uppercase letter.
- Function Keys: These are labeled F1 through F12 and are located at the top of the keyboard. They perform specific functions that can differ from one application to another. For example, F1 often opens the help menu.
- Navigation Keys: These keys are used to move the cursor around in a document or webpage. They include the four arrow keys, as well as Home, End, Page Up, and Page Down.
- Special Purpose Keys: This is a broad category that includes several important keys:
- Enter/Return: Used to confirm a command or start a new line of text.
- Backspace: Deletes the character to the left of the cursor.
- Delete: Deletes the character to the right of the cursor.
- Escape (Esc): Used to cancel an ongoing operation or close a dialog box.
- Caps Lock: Toggles all letter input to uppercase.
- Tab: Moves the cursor to the next tab stop.
- Numeric Keypad: Located on the right side of most full-size keyboards, this section is arranged like a calculator and is used for rapid input of numeric data.
Keyboard Key Classification Table
| Key Type | Examples | Primary Function |
|---|---|---|
| Alphanumeric | A, B, C, …, 1, 2, 3, … | Typing letters and numbers. |
| Modifier | Shift, Ctrl, Alt | Modifies the action of another key when pressed together. |
| Function | F1, F2, …, F12 | Performs special, application-specific tasks. |
| Navigation | Arrow Keys, Home, End | Moves the cursor on the screen. |
| Special | Enter, Esc, Backspace | Executes commands or performs specific editing tasks. |
Quick Revision Points
- A keyboard is a primary input device.
- The standard layout is called QWERTY.
- Ctrl + C is the shortcut for Copy, Ctrl + V for Paste.
- Backspace erases from the left, while Delete erases from the right.
- The Enter key is used to execute commands or create a new line.
- Function keys (F1-F12) have programmable functions that change with software.
- The Numeric Keypad is essential for tasks involving heavy data entry of numbers.
Extra Practice Questions
- What is the main purpose of the ‘Esc’ key?
- Which key combination is typically used to undo the last action?
- What is the difference between the ‘Home’ key and the ‘End’ key?
- If ‘Num Lock’ is off, what do the keys on the numeric keypad do?
- Which modifier key is used to select multiple non-adjacent files in a file explorer?
