Python Try/Except/Finally | Dataford Interview Questions

Explain Python try / except / finally with code, and specifically how finally behaves.

Asked in the technical interview stage. Implement finally_trace(mode) to return the order of events for several control-flow cases. The function must demonstrate that finally runs after normal execution, after a handled exception, before a returned value leaves the function, and before an unhandled exception propagates. Include a case showing that a return inside finally overrides an earlier return.

Input and Output

mode is one of success, handled, unhandled, return, or override. Return a list of event strings.

Constraints

mode is one of: success, handled, unhandled, return, override
The function must use try, except, and finally
Return a list of strings
The implementation must not print output

Function Signature

def finally_trace(mode):

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