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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 → Computer Security 1

Windows Firewall is found in?
Control Panel > Windows Defender Firewall
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Computer Fundamentals → Introduction to Computer 36

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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Unix philosophy states?
Write programs that do one thing well and work together via text streams
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Which Linux distribution is most commonly used on servers?
Ubuntu Server / CentOS / Red Hat Enterprise Linux
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Kali Linux is used for?
Penetration testing and security auditing (preloaded security tools)
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Android is based on?
Linux kernel with custom runtime (ART)
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ChromeOS is based on?
Linux kernel with Chrome browser as main interface
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Which OS uses APK packages?
Android
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iOS App Store review process is?
Mandatory App Store review by Apple before app publication
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Package manager 'pip' is for?
Python packages
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npm is package manager for?
Node.js / JavaScript
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Virtual environment in Python (venv) is used to?
Create isolated Python environments with separate dependencies per project
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conda is a package manager for?
Python and R scientific computing packages and environments
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shebang line (#!/usr/bin/python3) in scripts?
Specifies which interpreter to use when script is executed directly
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Which SQL statement is used to create a new database?
CREATE DATABASE
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Which SQL command selects all columns?
SELECT *
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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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Computer Fundamentals → Operating System Basics 1

iOS kernel is named?
XNU (X is Not Unix) — hybrid kernel from Mach and BSD
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Computer Fundamentals → Software and Hardware 1

Which command starts Python interpreter interactively?
python
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