Safety-Critical Systems CTEL-TM-SM Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which standard is specifically applicable to the functional safety of road vehicles?

   • AIEC 62304
   • BISO 9001
   • CISO 26262
   • DIEC 61508
   Reveal Solution Discussion Select an answer first
2. 22foundation · easy

   How do safety standards like IEC 61508 typically influence the test strategy?

   • AThey mandate specific test techniques and levels of rigor based on the safety integrity level.
   • BThey require that all testing be performed by an independent third-party organization.
   • CThey eliminate the need for risk-based testing because they provide complete test coverage requirements.
   • DThey focus exclusively on functional testing and do not address non-functional aspects.
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   Why is tool qualification an important consideration when using test tools in a safety-critical project?

   • ABecause tools are not allowed to be used for safety-critical testing.
   • BBecause tools cannot be used in safety-critical testing without special licenses.
   • CBecause tools that are used to verify safety requirements must be trusted to produce correct results, and qualification provides that confidence.
   • DBecause all test tools must be purchased from certified vendors.
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   Which test technique is most appropriate for verifying that a system correctly handles input values at the boundaries of its valid input range?

   • ABoundary value analysis
   • BDecision table testing
   • CEquivalence partitioning
   • DState transition testing
   Reveal Solution Discussion Select an answer first
6. 25application · medium

   A company is developing a railway signaling system that controls train movements. The system has two main software components: one that manages emergency braking (SIL 4) and another that provides passenger information displays (SIL 1). The project has limited test budget and a tight release deadline. The test manager must allocate testing effort across both components. Which approach best aligns with risk-based testing principles for this safety-critical context?

   • AAllocate equal test effort to both components to ensure uniform quality across the system.
   • BFocus all testing on the passenger information component because it has more user-facing features and thus higher visibility.
   • CTest only the emergency braking component since it is SIL 4, and skip testing the passenger information component entirely.
   • DPrioritize the emergency braking component with more rigorous testing, while applying a lighter but still adequate test approach to the passenger information component.
   Reveal Solution Discussion Select an answer first