The MISRA-C: 2012 Guidelines CT-AUT Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A tester is reviewing code and finds that a function uses recursion. The team's MISRA-C:2012 compliance policy is strict. What is the most appropriate action?

   • ADocument a deviation if recursion is necessary and the risk is assessed.
   • BIgnore it, as recursion is a common programming technique.
   • CAllow it if the recursion depth is bounded and the code is well-tested.
   • DReport it as a violation of a mandatory rule, as recursion is forbidden in all cases.
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2. 22application · medium

   During a code review, a tester finds a violation of a MISRA-C:2012 Advisory rule. The team has a policy that all Advisory rules must be followed unless a deviation is approved. The developer argues that Advisory rules are optional and can be ignored. What should the tester do?

   • AInsist that the code be changed immediately, as Advisory rules are always safety-critical.
   • BExplain that Advisory rules should be followed, but if the developer disagrees, initiate the deviation process.
   • CAgree with the developer and close the finding, since Advisory rules are not mandatory.
   • DEscalate the issue to the safety manager without further discussion, as any violation is unacceptable.
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4. 23application · medium

   A tester is performing a code review and notices that a function has a very high cyclomatic complexity. The tester suspects this may violate a MISRA-C:2012 rule. What is the most appropriate action?

   • AIgnore it, as MISRA-C:2012 does not address complexity.
   • BReport it as a violation of a coding style rule, as complexity is a style issue.
   • CUse a static analysis tool to check for complexity-related rules, and if none exist, note it as a potential risk.
   • DRequire the developer to refactor the function to reduce complexity, as it is a mandatory rule.
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5. 24foundation · easy

   In MISRA-C:2012, what does a 'Mandatory' compliance level imply?

   • AThe rule is recommended but not required for compliance.
   • BThe rule must be followed, and any deviation requires formal approval.
   • CThe rule is optional and can be ignored if the team decides.
   • DThe rule should be followed, but deviations are allowed if documented.
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6. 25expert · hard

   A static analysis tool reports a violation of a MISRA-C:2012 directive. The tester is unsure whether the directive is decidable or undecidable. The tool's output includes a note that the directive is 'undecidable'. What is the most appropriate action?

   • AConsult the MISRA-C:2012 documentation to confirm the directive's status, then manually review the code.
   • BIgnore the finding, as directives are not enforceable.
   • CTrust the tool's classification and treat the finding as a definite violation.
   • DAsk the developer to rewrite the code to avoid the directive, regardless of the finding's validity.
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