Software & Operating Systems
🔒 Log in to trackWindows OS features
🔒 Log in to trackMicrosoft Windows (Windows 10, 2015; Windows 11, 2021) is a single-user, multitasking, GUI-based OS.
| Feature | Meaning |
|---|---|
| GUI | Windows, Icons, Menus, Pointer (WIMP) instead of typed commands |
| Multitasking | Many programs run concurrently (preemptive scheduling) |
| Plug and Play (PnP) | New hardware is detected and configured automatically |
| File Explorer (Windows Explorer) | File/folder management shell (Win+E) |
| Control Panel / Settings | System configuration (Settings app in Win 10/11) |
| Task Manager | Processes, performance, startup (Ctrl+Shift+Esc) |
| Recycle Bin | Deleted files held here; Shift+Delete skips it (permanent) |
| Device Manager | Lists/controls hardware and drivers |
| Disk Management | Partition, format drives; Disk Cleanup/Defragmenter utilities |
| Windows Defender | Built-in antivirus/firewall; Windows Update keeps patches current |
| Command Prompt / PowerShell | CLI interfaces for typed commands |
| User accounts | Administrator vs Standard; login password/PIN |
| Virtual desktops / Snap | Multiple desktops (Win+Ctrl+D); window snapping (Win+arrow) |
| OneDrive / BitLocker | Cloud sync; disk encryption (BitLocker in Pro editions) |
Accessories: Notepad (plain text), WordPad (rich text, removed in Win 11), Paint, Calculator, Snipping Tool.
Detailed notes
What Windows is
Microsoft Windows is the world's most used desktop operating system: single-user, multitasking, GUI-based. Windows 10 arrived in 2015, Windows 11 in 2021. The desktop you see is the OS's graphical shell — behind it, the Windows kernel does the real work.
Feature table (each row is a one-mark question)
| Feature | Meaning |
|---|---|
| GUI | You point and click on Windows, Icons, Menus, Pointer (WIMP) instead of typing commands |
| Multitasking | Many programs run at once; the CPU switches between them so fast each seems continuous |
| Plug and Play (PnP) | Connect new hardware and Windows detects and configures it automatically — usually no manual driver hunt |
| File management | Files in folders, browsed in File Explorer |
| Recycle Bin | Deleted files land here first and can be restored; Shift+Delete skips it |
| User accounts | Separate login, password and personal folders per user |
The Windows toolbox
| Tool | Job |
|---|---|
| Task Manager | Shows running programs, 'not responding' apps, CPU/RAM use; start it with Ctrl+Shift+Esc |
| Control Panel / Settings | Change system settings — display, sound, users, network |
| Device Manager | Lists all installed hardware and its drivers; flags problems |
| File Explorer | Browse, copy, move, rename files and folders |
| Disk Cleanup | Deletes junk and temporary files |
| Disk Defragmenter | Reorganises scattered file pieces on hard disks |
Built-in accessories (know which does what)
- Notepad — plain text only: no bold, no pictures. Saves .txt.
- WordPad — light formatting (bold, fonts) in rich text; between Notepad and MS Word.
- Paint — simple drawing and image editing.
- Calculator, Snipping Tool (screenshots) — small single-purpose apps.
The mobile half of the story
- Android — owned and developed by Google; built on the Linux kernel; open source at its core (AOSP); runs on phones of many brands.
- iOS / iPadOS — Apple's mobile OS; closed source; runs only on Apple devices.
- Windows, macOS, Linux — the desktop trio; Android, iOS — the mobile duo.
Quick revision
- Windows = single-user + multitasking + GUI (WIMP). Win10 2015, Win11 2021.
- Plug and Play = auto-detect and configure new hardware.
- Task Manager = processes and 'not responding'; Device Manager = hardware and drivers; Control Panel = settings.
- Notepad = plain text; WordPad = formatted text; Paint = drawing.
- Android = Google + Linux kernel; iOS = Apple only.
Types of questions asked
Every way this subtopic shows up in exams — how to recognise it, the formula or logic to use, and a solved example.
Type 1: Windows feature identification (GUI, multitasking, PnP)very common4 practice Q
'The feature that auto-detects new hardware is', 'running many programs at once is called', 'WIMP stands for' — a feature name with four definitions.
- Auto-detect + auto-configure hardware = Plug and Play.
- Many programs at once = multitasking; WIMP = Windows, Icons, Menus, Pointer.
- Windows = single-user multitasking GUI OS — a three-label line exams quote directly.
Example: The Windows feature that automatically detects and configures a newly connected USB device is —
Plug and Play (PnP) — the OS identifies the device and loads a suitable driver without manual setup.
Type 2: Windows tool ↔ purpose matchingvery common3 practice Q
'Which tool shows CPU/RAM usage or stuck programs?', 'where do you change settings?', 'which tool lists hardware and drivers?'
- Processes and performance → Task Manager (Ctrl+Shift+Esc). Settings → Control Panel/Settings. Hardware + drivers → Device Manager. Files → File Explorer. Junk files → Disk Cleanup.
- 'Not responding' in the stem always points to Task Manager.
- Device Manager flags driver problems with warning marks.
Example: A program has stopped responding. Which Windows tool lets you end it forcibly?
Task Manager (Ctrl+Shift+Esc) — select the app and choose End Task. It also shows CPU, memory and disk usage.
Type 3: Windows accessories: Notepad / WordPad / Paintcommon2 practice Q
'Notepad saves files as…', 'which accessory draws pictures?', 'difference between Notepad and WordPad'.
- Notepad = plain text (.txt), no formatting at all.
- WordPad = basic rich-text formatting; MS Word = full formatting.
- Paint = drawing; Snipping Tool = screenshots; Calculator = maths.
Example: Which statement about Notepad is correct?
Notepad is a plain-text editor — it saves .txt files with no formatting (no bold, fonts or images). WordPad adds basic formatting.
Type 4: Mobile and desktop OS facts (Android, iOS, Linux)common3 practice Q
'Android is developed by…', 'Android is based on which kernel?', 'iOS runs on which devices?', 'which is open source?'
- Android = Google, built on the Linux kernel, open source at its core, many brands.
- iOS = Apple, closed source, only Apple hardware.
- Desktop trio: Windows (Microsoft), macOS (Apple), Linux (open source, Linus Torvalds).
Example: The Android mobile operating system is built on which kernel?
The Linux kernel — Android is Google's mobile OS layered over Linux; that is why it is often called 'Linux-based'.
Shortcut tricks
⚡ PnP = Plug 'n' Pray-free
Plug and Play means the OS auto-detects and auto-configures new hardware - no driver hunt. The phrase 'automatically detected' in a question = PnP.
Example: Windows feature that configures a newly attached printer automatically?
Plug and Play.
⚡ Task Manager 3-2-Esc
Fastest route to Task Manager: Ctrl+Shift+Esc (direct). Ctrl+Alt+Del only opens the security menu first. 'Direct' is what SSC tests.
Example: Shortcut that opens Task Manager directly?
Ctrl+Shift+Esc.
Where students lose marks
Believing Recycle Bin catches everything - Shift+Delete bypasses it, and flash-drive deletes often skip it too.
Confusing File Explorer (files) with Internet Explorer/Edge (browser).
Thinking Notepad saves rich formatting - Notepad is plain text only.
Practice sets — 16 questions
Sets of 10, mixed across the question types above. Each answer comes with a step-by-step explanation.
Topic test · 10 questions
Suggested time 4 min · wrong answers go to your mistake notebook automatically.