It's a problem of scale. Spend half an afternoon skimming through CtCI (shouldn't need much more as a seasoned developer) and you're good for N number of job in

It's a problem of scale. Spend half an afternoon skimming through CtCI (shouldn't need much more as a seasoned developer) and you're good for N number of job interviews. I'll take that rather than spend 4*N hours on take-home problems in addition to time spent on-site.