Dependability and Security MCQs Archives

11. An erroneous system state that can lead to system behavior that is unexpected by system users is known as________________?

A. Human error or mistake

B. System fault

C. System error

D. System failure

✅ The correct answer is option C.

12. To specify security requirements, one should identify the risks that are to be dealt with ?

A. True

B. False

Explanation: To specify security requirements, one should identify the assets that are to be dealt with.

✅ The correct answer is option B.

13. A system resource that has a value and has to be protected is known as ________________________?

A. Asset

B. Control

C. Vulnerability

D. None of the mentioned

✅ The correct answer is option A.
Explanation: The answer is self explanatory.

14. A chemical plant system may detect excessive pressure and open a relief valve to reduce these pressures before an explosion occurs. What kind of dependability and security issue the example states ?

A. Hazard avoidance

B. Damage limitation

C. Hazard detection

D. Hazard detection and removal

✅ The correct answer is option D.
Explanation: The system is designed so that hazards are detected and removed before they result in an accident.

15. An assessment of the worst possible damage that could result from a particular hazard is known as _________________?

A. Risk

B. Hazard probability

C. Hazard severity

D. Mishap

✅ The correct answer is option C.
Explanation: Hazard severity can range from catastrophic, where many people are killed, to minor, where only minor damage results. When an individual death is a possibility, a reasonable assessment of hazard severity is ‘very high’.

16. How many stages are there in Risk-driven requirements specification ?

A. three

B. four

C. five

D. six

✅ The correct answer is option B.
Explanation: These include Risk identification, Risk analysis, Risk reduction and Risk decomposition

17. Choose the fault class in which the following automated static analysis check would fall: “Unreachable code”?

A. Control Faults

B. Data Faults

C. Input/Output Faults

D. Interface faults

✅ The correct answer is option A.

18. An impersonation of an authorised user is an example of a security threat ?

A. True

B. False

Explanation: It is a security attack.

✅ The correct answer is option B.

19. Static Analysis involves executing a program ?

A. True

B. False

Explanation: Static analysis techniques are system verification techniques that don’t involve executing a program.

✅ The correct answer is option B.

20. Which of the following is a layer of protection for Security ?

A. Platform-level protection

B. Application-level protection

C. Record-level protection

D. All of the mentioned

✅ The correct answer is option D.