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GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

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Computer Fundamentals → Introduction to Computer 38

Which HTTP header controls caching?
Cache-Control
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Content-Type header specifies?
The media type of the request/response body (e.g., application/json)
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CORS preflight request uses which HTTP method?
OPTIONS
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WebRTC enables?
Real-time peer-to-peer audio, video, and data in browsers without plugins
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Progressive Web App (PWA) features include?
Offline capability, installable, push notifications using service workers
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Which Windows version introduced the Start Menu?
Windows 95
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Windows Task Manager shortcut is?
Ctrl+Shift+Esc
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Which Windows command checks disk for errors?
chkdsk
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The Windows Registry is?
A hierarchical database storing OS and application configuration
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regedit command opens?
Windows Registry Editor
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msconfig in Windows is used to?
Configure startup programs and services (System Configuration)
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Which Windows shortcut opens Run dialog?
Win+R
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Win+D shortcut in Windows?
Shows/hides desktop (minimizes all windows)
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Win+L shortcut in Windows?
Locks the computer screen
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Device Manager in Windows manages?
Hardware devices and drivers
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Which Windows command shows IP configuration?
ipconfig
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System Restore in Windows creates?
Restore points to revert system to previous working state
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Windows Event Viewer shows?
System, security, and application log entries
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Which file is Windows boot configuration stored in?
BCD (Boot Configuration Data) in Windows 7+
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NTFS permissions in Windows include?
Read, Write, Modify, Full Control, List Folder Contents
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UAC (User Account Control) in Windows?
Prompts for confirmation when apps request elevated privileges
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Windows Sandbox provides?
Temporary isolated desktop for running untrusted software safely
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Which command in Windows shows running processes?
tasklist
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The 'net user' command in Windows?
Manages user accounts from command line
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PowerShell vs Command Prompt: PowerShell?
Is more powerful with object pipeline and .NET integration
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Get-Process cmdlet in PowerShell?
Lists running processes (equivalent to tasklist)
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WSL (Windows Subsystem for Linux) allows?
Running Linux binaries natively on Windows without VM
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Which Windows feature creates automatic file backups?
Shadow Copy (VSS)
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BitLocker in Windows provides?
Full disk encryption
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EFS (Encrypting File System) in Windows?
Encrypts individual files/folders transparently using user certificates
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Windows Hyper-V is a?
Type 1 hypervisor built into Windows for running virtual machines
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Which command creates a symbolic link in Windows?
mklink
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Windows Subsystem for Android (WSA) allows?
Running Android apps on Windows 11
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macOS is based on?
BSD Unix (Darwin kernel)
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Spotlight search in macOS is accessed by?
Cmd+Space
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Time Machine in macOS is?
Automated backup system with hourly, daily, and weekly backups
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Homebrew in macOS is?
Package manager for installing software on macOS/Linux
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Terminal command 'top' in macOS/Linux shows?
Real-time system resource usage and running processes
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Computer Fundamentals → Computer Security 1

Windows Firewall is found in?
Control Panel > Windows Defender Firewall
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Computer Fundamentals → Memory Units 1

Virtual memory in Windows is configured in?
System Properties > Advanced > Performance > Virtual Memory
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