If your process is anything like mine, you'll get rejected, then get a phone screen invitation from a recruiter two weeks later, then talk to the hiring manager, who'll pass you off to a weirdly hostile technical panel. There, they'll ask you technical questions but not actually let you explain. In at least one situation, they seemed to want me to describe how I would solve the problem by making the problem worse. Then you'll get rejected.

Your stakeholder is getting the wrong numbers out of a report. How do you solve this?

The report is generated by a process you don't have visibility into, and there is no documentation of it.

After some probing, you've isolated the problem to a particular upstream process, but you don't have access to it, and the manager in charge will not give you access or documentation.

You need to unblock your stakeholder within two days. How do you do it?