Quick Revision

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

What is /home in Linux?
User home directories
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What is /bin in Linux?
Essential command binaries (ls, cp, mv)
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What is /dev in Linux?
Device files (hardware interfaces)
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Process 1 (PID 1) in Linux is?
init/systemd
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Which signal terminates a process in Linux?
SIGKILL
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POSIX standards define?
Portable OS interface standards for Unix-like systems
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Blue Screen of Death (BSOD) in Windows indicates?
Fatal system error requiring reboot
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Which file in Linux contains user account information?
/etc/passwd
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Encrypted passwords in Linux are stored in?
/etc/shadow
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Multi-factor authentication combines?
Multiple authentication factors from different categories
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Vishing is?
Voice/phone-call phishing
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Smishing uses?
SMS text messages
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Man-in-the-middle (MITM) attack?
Intercepts communication between two parties
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ARP spoofing is?
Sending fake ARP replies to associate attacker's MAC with victim's IP
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DNS poisoning (cache poisoning) inserts?
Corrupt DNS records redirecting to malicious sites
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Keylogger records?
Every keystroke typed by user
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Rootkit is?
Malware hiding deep in OS to conceal other malware
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Botnet is?
Network of infected computers controlled remotely
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Command and Control (C&C) server is used by?
Botnet operators to control infected machines
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Sandboxing in security?
Runs untrusted code in isolated environment
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Penetration testing should be done?
With explicit written authorization
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CVE stands for in security?
Common Vulnerabilities and Exposures
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OWASP stands for?
Open Web Application Security Project
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OWASP Top 10 is?
List of most critical web application security risks
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Which attack targets the application layer (Layer 7)?
HTTP flood/DDoS
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SYN flood attack exploits?
TCP three-way handshake
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TCP three-way handshake steps are?
SYN, SYN-ACK, ACK
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Which OSI layer does TLS/SSL secure?
Between layers 4 and 7
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Hash function is one-way because?
Given hash, original data cannot be derived
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SHA-256 produces a hash of?
256 bits
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MD5 is now considered?
Deprecated — vulnerable to collisions
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Which of the following is NOT a cloud service model?
HaaS (Hardware as a Service)
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Elasticity in cloud computing means?
Automatically scaling resources up or down based on demand
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Pay-as-you-go in cloud computing?
Pay only for resources consumed
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Which cloud deployment model serves only one organization?
Private cloud
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Computer Fundamentals → Operating System Basics 1

What does 'kernel panic' mean in Linux?
Fatal OS error requiring reboot
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Computer Fundamentals → Computer Security 4

Social media phishing is called?
Spear phishing
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Whaling phishing targets?
Specific high-profile executives
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Spyware is malware that?
Self-replicates
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Adware is malware that?
Displays unwanted advertisements
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