Summary questions for cyber-physical systems

Questions are randomized per student, and you will only receive correct/incorrect feedback for them. In Problem 1, each question has exactly one correct option.

In Problem 2, each student will get at least one correct option, usually more. Problem 2 is accepted when the score is 12 or higher, and points are shown with a yellow background. Unfortunately, Plussa gives “incorrect” feedback for partially correct answers. However, Problem 2 is considered passed if the score is 12 or more. From the score alone, you cannot directly infer whether an individual choice was correct or not. Points start accumulating only after more than half of the choices in the problem are correct.

Question 1

Examining cyber-physical systems

is exactly the area of cybersecurity that is not information security.

broadly understood, includes all of cybersecurity as a subdomain.

extends the perspective of traditional information systems.

is part of the information theory of physics.

Question 2

Compromising the security of a cyber-physical system

has proven easy and profitable for criminals.

is sometimes possible even if the system has not been modified for a long time.

is among the most highly valued skills among cybercriminals.

is a key tool of cyber warfare.

Question 3

In cyber-physical systems

safety features are more important than security features.

security features are more important than safety features.

security and safety features are separate but influence each other.

security and safety features must be implemented independently.

Question 4

Which of the following is an essential part of a cyber-physical system?

internet or Bluetooth connection

log collection system

programming interface

a sensor or actuator

Question 5

Is a human a cyber-physical system?

Yes, if they have a medical device connected to a network installed.

Yes, because their consciousness interacts with computers most of their waking time, even when not connected.

No, because although they are physical, they control the cyber environment rather than the other way around.

No, because cybersecurity applies only to information systems.

Question 6

What is usually a major additional concern in cyber-physical systems besides safety and security?

updatability of real-time systems

preservation of privacy

attractiveness of the system to attackers

unfavourable operating conditions

Question 7

Anomaly detection is one IDS method (intrusion detection system), but in cyber-physical systems it is also used in

attack prevention.

compliance with standards.

fault tolerance.

eliminating uncertainties related to control system operation.

Question 8

Bump-in-the-wire means

an additional device securing the communication of a legacy system.

a keylogger or similar installed by an attacker.

a network device used for anomaly detection.

an intentional or accidental network congestion situation.

Select the options that describe a cyber-physical system with a physical sensor, an actuator that inevitably affects the physical world beyond mere display, control software connecting them, and a supervisory device that can adjust operation. (Note: the internet is not necessarily required here.)

Question 1

Traffic lights that detect an approaching bus and switch to green faster.

A system that reports a car’s tire pressure drop based on wheel rotation speed.

Automatic identification of livestock using RFID tags, if it also adjusts feed valves.

A digital blood pressure monitor for home use.

A fitness machine that adjusts resistance according to a preselected program.

A modern digital piano whose tuning level can be adjusted.

Real-time timetable displays at bus stops.

A tuning meter used by a musician to check the frequency of a note.

A botnet sending spam.

A self-service checkout that does not allow exit without a printed receipt.

A cruise missile.

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