I agree with LiquidMidnight that interview processes as a whole are not particularly effective predictors of success in a role. But my perspective is that has more to do with the fact that 90%+ of the interview processes I've encountered out there just plain suck. A well constructed process with skilled interviewers can be highly effective and often significantly more relevant in my experience than standard assessments. I could wax on and provide data supporting why I believe that, but don't want to get too far off topic.
Also, regarding prospective employers asking about other opportunities you may be exploring - it is certainly ethical and very commonplace. IMO, being transparent about exactly where you are is a strong negotiation tactic - it encourages employers to move faster and come with a stronger offer. Again, just IME, candidates that are more cagey or guarded around things like this tend to raise a bit of a red flag. And they're certainly getting lowballed (if they get to offer at all). If they're interested in the company and role, inevitably they'll come clean anyway and the end result will be the same. As the employer, I'd just feel better about how we got there.
At executive level, I ask candidates all the time for W2s, comp and retirement statements. I also ask for specific breakdowns of all competing offers - 9 times out of 10, candidates happily provide it. Again, standard industry practice....
Also, regarding prospective employers asking about other opportunities you may be exploring - it is certainly ethical and very commonplace. IMO, being transparent about exactly where you are is a strong negotiation tactic - it encourages employers to move faster and come with a stronger offer. Again, just IME, candidates that are more cagey or guarded around things like this tend to raise a bit of a red flag. And they're certainly getting lowballed (if they get to offer at all). If they're interested in the company and role, inevitably they'll come clean anyway and the end result will be the same. As the employer, I'd just feel better about how we got there.
At executive level, I ask candidates all the time for W2s, comp and retirement statements. I also ask for specific breakdowns of all competing offers - 9 times out of 10, candidates happily provide it. Again, standard industry practice....