If someone can just look it up, digest information in X minutes and come up with the same answer, then why does it matter that they didn't memorize it in the first place? Presumably I'm hiring an expensive problem-solver with good judgment here, accumulation of past knowledge beyond some basic level of competence is useful, but secondary.
Fundamentally, the issue is the interviewing/selection process itself. The best interview that I've encountered is the long interview. I hire you for four months as a co-op, see what you can do, and we go from there. Impractical in many/most settings, obviously.
> If someone can just look it up, digest information in X minutes and come up with the same answer, then why does it matter that they didn't memorize it in the first place?
But this is usually not possible- it's contingent on other people having already solved and posted solutions online for some question worded nearly the same. Much of the knowledge behind interview questions applies to all sorts of programming problems where the solution won't be available to copy. A knowledgeable programmer would know quickly that some problem is best approached by dfs or bfs, while the cheater may not.
> Fundamentally, the issue is the interviewing/selection process itself
I agree, but this will always be a hard process. LC problems are like IQ test or SATs, they work fairly well most of the time, but probably better to weed out the particularly weak candidates than determine how good people truly are.
Fundamentally, the issue is the interviewing/selection process itself. The best interview that I've encountered is the long interview. I hire you for four months as a co-op, see what you can do, and we go from there. Impractical in many/most settings, obviously.