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1. What is an Industrial Control System (ICS)?

a. A system to control vehicles
b. A system for industrial automation and process control
c. A system to manage financial transactions
d. A retail inventory management platform
Answer: binfosecinstitute+2

2. PC-based controllers in ICS are also known as?

a. Logic Drives
b. Safety Switches
c. Soft PLCs
d. Data Diodes
Answer: ccloud.google+1

3. Which of the following is a component of ICS?

a. Remote Terminal Unit (RTU)
b. Firewall Appliance
c. Antivirus Software
d. SIEM Dashboard
Answer: acontroleng+1

4. The main function of a PLC in ICS is?

a. Network Monitoring
b. Programming Web Apps
c. Automating Industrial Processes
d. Email Filtering
Answer: cautomationforum+1

5. What is a common communication protocol in ICS networks?

a. SMTP
b. Modbus
c. HTTP
d. POP3
Answer: bcloud.google+1

6. Which of these is a cybersecurity threat to ICS?

a. Malware
b. Dust Accumulation
c. Temperature Control
d. Faulty Sensors
Answer: acontroleng+1

7. Why is ICS cybersecurity critical?

a. It prevents power outages and physical damage
b. It increases website traffic
c. It lowers software licensing costs
d. It ensures mobile compatibility
Answer: acloud.google+1

8. Human-Machine Interface (HMI) is used for?

a. Data Encryption
b. Operator Interaction with Industrial Systems
c. Video Streaming
d. File Compression
Answer: binfosecinstitute+1

9. Which standards framework is widely applied to ICS security?

a. ITIL
b. ISA/IEC 62443
c. PCI DSS
d. GDPR
Answer: bscribd+2

10. A ‘data diode’ is used in ICS for?

a. Two-way wireless communication
b. Direct database access
c. One-way secure data transfer
d. Wireless sensor networking
Answer: cscribd+1

11. What is a SCADA system?

a. A web design tool
b. Supervisory Control and Data Acquisition
c. Smart Card Authentication Device
d. Secure Control and Data Administration
Answer: bcontroleng+1

12. What does segmentation in ICS mean?

a. Division of physical components
b. Separation of networks to reduce attack surface
c. Disabling firewalls
d. Replacing sensors monthly
Answer: bscribd+1

13. Which protocol typically transports ICS traffic and is prone to security issues?

a. Telnet
b. FTP
c. Modbus/TCP
d. LDAP
Answer: ccloud.google+1

14. A key difference between ICS and typical IT networks is?

a. ICS requires frequent OS updates
b. ICS can usually tolerate communication latency
c. ICS often prioritizes availability and safety over confidentiality
d. ICS uses only wireless networks
Answer: cinfosecinstitute+1

15. What cyber-attack in 2010 targeted ICS by manipulating PLC code?

a. WannaCry
b. Stuxnet
c. NotPetya
d. BlackEnergy
Answer: binfosecinstitute+1

16. Why is patching difficult in ICS?

a. ICS uses cloud storage
b. ICS devices are not on networks
c. Patches may disrupt processes and systems must run continuously
d. ICS backups are encrypted
Answer: ccontroleng+1

17. Which physical attack vector is relevant to ICS?

a. Distributed Denial of Service (DDoS)
b. Phishing
d. Insider inserting rogue USB devices
c. SQL Injection
Answer: dcloud.google+1

18. The NIST 800-82 guide provides?

a. Firewall rules for home use
b. Best practices for ICS security
c. Antivirus policy for ICS
d. Encryption protocol for cloud backups
Answer: binfosecinstitute+1

19. ICS environments often rely on _______ for real-time operation.

a. Cloud computing
b. Deterministic communications
c. Peer-to-peer networking
d. Public DNS hosting
Answer: bcontroleng+1

20. Which ICS device typically collects data from field sensors?

a. HMI
b. RTU
c. Modem
d. Router
Answer: binfosecinstitute+1

21. Security zones in ICS are used to:

a. Separate business from control networks
b. Speed up email delivery
c. Increase web traffic
d. Manage printers
Answer: aautomationforum+1

22. The air gap approach in ICS refers to?

a. Wireless connectivity
b. Full physical separation from other networks
c. Line-of-sight communications
d. Use of Bluetooth
Answer: bsecurityscientist+1

23. Which communication port is commonly used by Modbus TCP?

a. 23
b. 502
c. 80
d. 445
Answer: bscribd+1

24. The main concern with default passwords in ICS is?

a. They expire too quickly
b. They are easy for attackers to guess
c. They increase network speed
d. They trigger IDS signatures
Answer: bcloud.google+1

25. Which safety system is found in process industries?

a. Building access control
b. Smoke detectors
c. SIS (Safety Instrumented System)
d. Web server
Answer: cscribd+1

26. Which of these is a threat actor targeting ICS?

a. Amateur gamers
b. Nation-state hackers
c. Social media bots
d. Spam emailers
Answer: bsecurityscientist+1

27. The function of an RTU in ICS is?

a. Local data storage
b. Data acquisition and remote control
c. Website publishing
d. OT network segmentation
Answer: bcontroleng+1

28. HMI stands for:

a. Hardware Middleware Integration
b. Human-Machine Interface
c. Host Management Infrastructure
d. High-speed Memory Input
Answer: bautomationforum+1

29. SIEM systems in ICS are primarily for?

a. Automating valves
b. Aggregating and analyzing security logs
c. Load balancing
d. Network segmentation
Answer: bcloud.google+1

30. Which category best describes PLCs?

a. Actuators
b. Computation modules
c. Field controllers
d. Antivirus solutions
Answer: cinfosecinstitute+1

31. The principle of least privilege in ICS means?

a. Assigning the same rights to all users
b. Giving users only the access required for their tasks
c. Sharing passwords to improve continuity
d. Disabling all user accounts
Answer: bcontroleng+1

32. One reason insiders pose a unique threat to ICS is?

a. They can disrupt processes with their access
b. They send marketing emails
c. They install regular patches
d. They design HMI screens
Answer: acloud.google+1

33. The primary goal of a Denial of Service (DoS) attack on ICS is to:

a. Gain remote access
b. Disrupt process availability
c. Steal sensor data
d. Improve efficiency
Answer: bcontroleng+1

34. What does the TSA Security Directive impact?

a. Power generation
b. Pipeline operators
c. Web browsers
d. Light rail transit
Answer: bscribd

35. Which of the following best helps in securing remote access to ICS?

a. Open Wi-Fi networks
b. Two-factor authentication
c. Default credentials
d. HTTP-only connections
Answer: bscribd+1

36. A specific ICS malware that caused power outages in Ukraine in 2015:

a. Flame
b. CrashOverride
c. Zeus
d. Slammer
Answer: bsecurityscientist+1

37. What is essential to maintain in ICS during a ransomware attack?

a. System confidentiality
b. Process availability and safety
c. Regular software upgrades
d. Email access
Answer: bcloud.google+1

38. Why are field devices often targeted in ICS attacks?

a. They are isolated
b. They lack advanced security controls
c. They run Linux OS by default
d. They are invisible to attackers
Answer: bcontroleng+1

39. What critical incident involved manipulation of drinking water chemicals in Florida (2021)?

a. Colonial Pipeline
d. Maroochy Shire
b. Oldsmar Water Treatment
c. BlackEnergy
Answer: bsecurityscientist+1

40. Which of these standards focuses on continual improvement of ICS security management processes?

a. ISA/IEC 62443
b. ISO/IEC 27001/27002
c. PCI DSS
d. NERC CIP
Answer: bscribd

41. Which communication method is considered most secure for ICS?

a. Direct public internet connection
b. Encrypted, segmented communication with access controls
c. Use of default ports
c. Peer-to-peer file sharing
Answer: bsecurityscientist+1

42. ICS patch management differs from regular IT patching because it:

a. Is automated and frequent
b. Must be carefully planned due to downtime risk
c. Is always performed remotely
c. Uses web-based consoles
Answer: bcloud.google+1

43. Safety Instrumented Systems are primarily meant to:

a. Store sensor data
b. Mitigate industrial process hazards
c. Manage website passwords
c. Provide wireless access
Answer: bscribd+1

44. Physical security in ICS prevents:

a. Email phishing
b. Unauthorized physical access to critical components
c. Data compression errors
c. Use of cloud storage
Answer: bcontroleng+1

45. What does an ICS firewall typically control?

a. Internet browsing access
b. Traffic between zones (e.g., IT and production networks)
c. Mobile device usage
c. File types accepted on HMIs
Answer: bcloud.google+1

46. Directional gateways or data diodes are used in ICS to:

a. Prevent equipment overheating
b. Enforce unidirectional data flow and protect critical assets
c. Provide VPN access
c. Share files between operators
Answer: bscribd+1

47. The ‘govern’ phase was added in which NIST Cybersecurity Framework version?

a. v1.0
b. v2.0
c. v0.9
c. v1.1
Answer: bscribd

48. What is the function of a DMZ in ICS?

a. Allow direct access from the internet
b. Isolate ICS and IT networks and control data exchanges
c. Provide web hosting services
c. Speed up protocol translation
Answer: bcontroleng+1

49. What is a key step in incident response for ICS environments?

a. Ignoring logs
b. Documenting events, preserving evidence, and collaborating with experts
c. Shutting off all systems immediately
c. Updating social media
Answer: binfosecinstitute+1

50. Which international organization is central to ICS standards development?

a. PCI
b. IEC (International Electrotechnical Commission)
c. WiFi Alliance
c. IETF
Answer: bscribd+1

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