Operating System and Windows

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.

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.

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.

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.