> Did I mean 2 unique pages per day or overall?
The author needs a course in logic. "They visited at least two unique pages." is not ambiguous. Visiting page A on day 1 and visiting page B on day 2 makes the sentence true.
Interviews are just not the same thing as real life requirements gathering, so people's thought processes will not be the same. Even if you try to roleplay as someone that doesn't understand how to state requirements precisely, all of the normal procedures and thought processes for sussing that out are compromised due to the inrerview setting. And your ability to assess those processes are compromised due to how familiar you are with the question and how much you've deconstructed it.
It's not the time to be tricky (though somehow simultaneously believing it is and is not a trick question). There's so many more interesting things that could be gleaned from a person's interview performance that "is this interviewer playing fuck-fuck games with me" doesn't rate whatsoever.
The user has visited A and B on day 1, and A on day 2. So the total page hits is (A, B, A). Remove duplicates and you have (A, B) which makes the sentence true.
Imagine he said:
> They bought at least two unique products
What would you expect the requirements to be?
>Now, given two log files (log file from day 1 and log file from day 2) we want to generate a list of ‘loyal customers’ that meet the criteria of: (a) they came on both days, and (b) they visited at least two unique pages.
It appears to me that the requirement could be interpreted as either:
"(visit on day 1) AND (visit on day 2) AND (total unique pages count > 2)"
a clearer way to put it would be "visited at least two unique pages in total"
or "(visit at least two unique pages on day 1) AND (visit at least two unique pages on day 2)"
a clearer way to put it would be "visited at least two unique pages on each day"