Bug Fixing and Testing | Dataford Interview Questions

Tell me about a time you found bugs in a frontend codebase and verified the fix with testing.

Implement find_verified_fixes to identify test cases that failed before a change and pass afterward. Given expected outputs, pre-fix outputs, and post-fix outputs, return the indices of tests where the pre-fix output differed from expected and the post-fix output matched it. Use the function signature and input/output shapes below.

Constraints

0 <= len(expected) = len(before) = len(after) <= 300
Each result can be an integer, string, boolean, or null
Return indices in ascending order
A test is verified only when it failed before the fix and passed afterward

Function Signature

def find_verified_fixes(expected, before, after):

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Problem

Tell me about a time you found bugs in a frontend codebase and verified the fix with testing.

Constraints

0 <= len(expected) = len(before) = len(after) <= 300
Each result can be an integer, string, boolean, or null
Return indices in ascending order
A test is verified only when it failed before the fix and passed afterward

Function Signature

def find_verified_fixes(expected, before, after):

Your question is Bug Fixing and Testing. 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.