Operating Systems
Definition: An operating system (OS) is system software that manages the computer's hardware and software and provides an interface for the user.
What an OS Does
- Manages memory, processes, files and devices.
- Provides the user interface (desktop, windows, icons).
- Examples: Windows, macOS, Linux, Android.
Windows Basics
- Windows Explorer / File Explorer — manages files and folders.
- Keyboard shortcuts: Ctrl+C copy, Ctrl+V paste, Ctrl+X cut, Ctrl+Z undo, Ctrl+S save.
- The Recycle Bin temporarily holds deleted files.
Real-world example: When you copy a file with Ctrl+C and paste it elsewhere, the OS is managing that file operation for you.
Solved Examples: Operating System
Example 1. Which is an operating system: MS Word, Windows, Chrome, Excel?
- Windows.
Example 2. The shortcut Ctrl+Z is used to:
- Undo the last action.
Example 3. Deleted files in Windows are first moved to the:
- Recycle Bin.
⚡ Speed Tricks & Shortcuts
- OS examples: Windows, macOS, Linux, Android; it manages hardware & software.
- Shortcuts: Ctrl+C copy, Ctrl+V paste, Ctrl+X cut, Ctrl+Z undo, Ctrl+S save.
- Deleted files go to the Recycle Bin first.
Calling Chrome/Word an operating system — those are applications; Windows is the OS.
Operating System and Windows — Revision Notes
Quick-revision notes for Operating System and Windows — the must-know points for SSC CGL Tier-I/II.
- An Operating System (OS) manages hardware and software resources and provides a user interface.
- Functions: process management, memory management, file management, and device control.
- Examples: Windows, Linux, macOS, Android, iOS.
- Windows is a GUI-based OS; the desktop, taskbar, and Start menu are key elements.
- File management uses folders/directories; common shortcuts: Ctrl+C (copy), Ctrl+V (paste), Ctrl+Z (undo).
- The OS acts as an interface between the user and the hardware.
Operating System and Windows — Flashcards (SSC CGL)
Cover the answer, recall, then check. 6 cards on the must-know Operating System and Windows facts for SSC CGL.
Q1. What is the main role of an operating system?
A1. To manage hardware/software resources and provide a user interface.
Q2. Name three operating systems.
A2. Windows, Linux, and macOS (also Android, iOS).
Q3. What does the shortcut Ctrl+Z do?
A3. Undo the last action.
Q4. What kind of interface does Windows provide?
A4. A Graphical User Interface (GUI).
Q5. Name two functions of an OS.
A5. Memory management and file management (also process and device management).
Q6. What does Ctrl+C do?
A6. Copy the selected item.