The MISRA-C: 2012 Guidelines CT-AUT Practice Questions (Page 1)

Questions 1–5

1. 1expert · hard

   A project has a MISRA-C:2012 compliance policy that states 'All Mandatory and Required rules must be followed; Advisory rules are recommended but not required.' A developer proposes a deviation for a Required rule violation. The safety manager asks the tester to evaluate the deviation. What is the most important factor to consider?

   • AThe deviation must include a technical justification and risk assessment.
   • BThe deviation must be approved by the tool vendor.
   • CThe deviation must be approved by the customer.
   • DThe deviation must be documented in the code comments.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A static analysis tool reports a violation of a MISRA-C:2012 rule. The tester wants to determine if the rule is decidable or undecidable. What is the best way to find this information?

   • ARun the tool multiple times to see if the result changes; if it does, the rule is undecidable.
   • BAsk the tool vendor, as they decide the decidable status.
   • CCheck the MISRA-C:2012 documentation, which explicitly states whether each rule is decidable or undecidable.
   • DLook at the rule number: rules with even numbers are decidable, odd numbers are undecidable.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A company develops an automotive infotainment system that is not directly safety-critical but is part of a vehicle. The team is considering adopting MISRA-C:2012 for the entire codebase. The project manager asks whether this is necessary. What is the most appropriate response?

   • AMISRA-C:2012 is mandatory for all automotive software, so it must be adopted.
   • BMISRA-C:2012 can be adopted selectively, focusing on modules that interact with safety-critical functions or that may affect vehicle safety.
   • CMISRA-C:2012 is only applicable to safety-critical systems, so it should not be used for infotainment.
   • DMISRA-C:2012 should be avoided for infotainment because it restricts modern C features and increases development cost.
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5. 4application · medium

   A tester is reviewing a module and finds that the code uses a non-standard compiler extension. The team's MISRA-C:2012 compliance policy requires adherence to the guidelines. What is the most appropriate action?

   • AIgnore the extension because it does not affect the code's behavior.
   • BAllow the extension because it is widely used in the industry.
   • CRemove the extension immediately, as all non-standard extensions are unsafe.
   • DDocument a deviation if the extension is necessary and the risk is assessed.
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6. 5application · medium

   A project has a MISRA-C:2012 compliance policy that allows deviations for Required rules. A developer proposes a deviation for a Required rule violation. What is the most important element that must be included in the deviation documentation?

   • AA promise that the violation will be fixed in a future release.
   • BA justification for why the deviation is necessary and why the risk is acceptable.
   • CThe name of the developer who wrote the code.
   • DThe compiler version used to build the code.
   Reveal Solution Discussion Select an answer first