Debugging Intermittent Embedded Issues | Dataford Interview Questions

Can you explain your approach to debugging intermittent issues in embedded systems?

Implement the trace-analysis portion of that approach. Given event identifiers from failing and passing runs, return events present in every failing run and absent from every passing run.

Function: diagnostic_events(failing_runs, passing_runs)

Return a lexicographically sorted list of unique event identifiers. Each run is a list of strings. Assume at least one failing run exists.

Constraints

1 <= len(failing_runs) <= 10^4
0 <= len(passing_runs) <= 10^4
Each run contains zero or more event identifiers
Each event identifier is a non-empty string
The first failing run contains at least one event identifier
Return every qualifying identifier exactly once, in lexicographic order

Function Signature

def diagnostic_events(failing_runs, passing_runs):

Your question is Debugging Intermittent Embedded Issues. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem