[aladine]

Surely the effort you put into 60 technical interviews are great. But instead, you should focus to 10 companies you would like to join, it may turn out better as you could focus your energy and thinking for cover letter and preparation.

[ghaff]

Maybe? Doing more interviews probably helps prepare you for interviews to a certain degree. If he's shortchanging his interviews by doing so many of them--e.g. by not researching the company--that's one thing. But, in general, unless you're following a very targeted strategy, I'd probably err on the side of applying to more companies rather than fewer. If he's just applying cold, the process is sufficiently random that you're usually best off primarily playing a numbers game.