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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 35

Process ID (PID) is?
Unique identifier for each process
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Zombie process is a process that?
Has finished but entry remains in process table
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Which storage technology has no mechanical moving parts?
SSD
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NVMe stands for?
Non-Volatile Memory Express
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Which file attribute makes it read-only?
R
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Which protocol is used to transfer files over the internet?
FTP
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Which key is used to permanently delete a file in Windows?
Shift+Delete
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What extension do executable files in Windows typically have?
.exe
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GUI was first commercially introduced by?
Xerox PARC
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Which key combination opens Task Manager in Windows?
Ctrl+Shift+Esc
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The recycle bin in Windows temporarily stores?
Deleted files
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Which of the following provides wireless connectivity?
Wi-Fi (WLAN)
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Bluetooth operates at which frequency?
2.4 GHz
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IP address version 4 consists of?
32 bits
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IPv6 address consists of?
128 bits
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Which device operates at the network layer (Layer 3)?
Router
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A hub operates at which OSI layer?
Layer 1
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Which OSI layer is responsible for reliable data transmission?
Transport
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DNS stands for?
Domain Name System
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HTTP stands for?
HyperText Transfer Protocol
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HTTPS adds which security feature to HTTP?
Encryption (SSL/TLS)
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Which layer of OSI model manages encryption?
Presentation
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Which is the correct full form of URL?
Uniform Resource Locator
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SMTP is used for?
Sending email
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A MAC address is?
48-bit hardware identifier
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Which topology connects all devices to a central hub?
Star
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Which topology has highest fault tolerance?
Mesh
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LAN stands for?
Local Area Network
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WAN stands for?
Wide Area Network
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Which device connects two different network types?
Gateway
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Cloud computing refers to?
Delivering computing services over the internet
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SaaS stands for?
Software as a Service
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IaaS stands for?
Infrastructure as a Service
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Which type of virus attaches to executable files?
File virus
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Ransomware encrypts user files and demands?
Payment for decryption key
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Computer Fundamentals → Internet Basics 2

Email protocol for receiving mail is?
POP3/IMAP
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The internet is a?
WAN
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Computer Fundamentals → Computer Security 2

A firewall is used to?
Block unauthorized network access
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A Trojan horse is?
Malware disguised as legitimate software
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Computer Fundamentals → Memory Units 1

A worm differs from a virus in that?
Worms self-replicate without needing host files
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