Debugging Quiz: Finding What Is Broken

Question 1A user reports that a result is wrong, but the written requirement matches the output. What should the investigator clarify first?

The current screen layout’s definition of required behaviorThe newest feature proposal’s replacement of agreed behaviorA required output size matching the implementation file’s lengthThe expected behavior agreed with the responsible users

Question 2In a calculation, a valid statement subtracts a fixed amount when the requirement calls for a percentage reduction. What type of fault is this?

A logic error in the arithmetic relationshipA runtime error that prevents the arithmetic from executingA requirement defined by whatever the existing code calculatesA syntax error because the result is unexpected

Question 3After a programmer changes a condition, a dependency, and a cache, a failing case passes. Which causal conclusion is justified?

The condition was responsible because it was the first editThe cache repair caused the success because it was performed lastThe combined edits passed, but their separate contributions are unresolvedThe dependency change fixed the fault because it altered the most lines

Question 4An intermittent failure depends on the order in which two requests arrive. What makes the investigation repeatable?

Discard failure records and reproduce the last successful sequenceCapture the arrival sequence, then replay it under controlled conditionsExecute the requests separately to recreate their overlapRename the requests to force their arrival order

Question 5During an investigation, a developer needs variable values at a particular instruction while execution is paused. Which tool serves that purpose?

An execution-time average from completed runsA formatter inspecting source indentationA static package inventory for the programA debugger stopped at the point of interest

Question 6A repair has been understood and checked. Which artifact best protects against its recurrence?

A release label marking the behavior as correctedA picture of the corrected outputA regression test exercising the repaired caseA comment claiming that the defect has been resolved

Question 7A crash is hidden by replacing a missing required address with an empty string. What investigation remains?

Trace the data’s origin and locate the failed handoffMove the replacement statement nearer the display routineChoose an empty address as the default for later submissionsProve that blank text has the appearance of an address

Question 8On a colleague’s machine, a failure occurs but does not occur on the developer’s. Which comparison is useful?

The developers’ preferred names for the screenThe latest passing result from a different workflowThe writing style of comments in unrelated filesThe runtime environment and input state

Question 9A robot’s failing motion could damage nearby equipment. How should the team investigate safely?

An isolated simulation with no powered machinery attachedHigher motor power to make the symptom easier to observeRepeated faults beside the equipment for better visibilityA live run with the protective enclosure disabled

Question 10An unfamiliar program gives a wrong result at a documented interface. What is a focused starting approach?

Read modules in alphabetic order until the cause appearsTrace the failing path from that interface into its dependenciesReplace the interface because unfamiliar code is defectiveRewrite the application before preserving a failing input

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Debugging Quiz: Finding What Is Broken

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