js intern onsite挂经，求大米

去年9月面的今年暑假的trader实习，onsite面到第四轮，三天后通知挂了。onsite问的题和另一个帖子里基本一样：

除了这个帖子里的之外还考了一个blotto game的变种，具体的题目不记得了。

挂的主要原因是market making游戏没玩好，当时的面试官要求给的bid-ask spread完全无风险。以前面试过的人说两年前还没这个要求。

电面面经：
First round
Flip 4 coins, when you see a head, you get $1. What is the expected return of this game? What if you can reflip (meaning reflip all coins) as many times as you want? What if you have to pay $1 each time to reflip? What is the best strategy?
Smallest integer whose all-digit product is 10000.

Second round
There is $100 in the box. You report a number x and your opponent reports a number y. If x + y <= 100, you get $x and he gets $y. If x+y>100, both of you get nothing. If your opponent i

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more value would you gain from this trade?
Assuming your opponent can see the results of the first 10 flips of the binomial distribution, what will your strategy be? You can suppose his strategy is to bid d + 94 first, where d is the number of heads in the first 10 flips. Would you feel comfortable keeping that strategy if you play with your opponent 1000000 times? How would you change your strategy?

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很想了解一下onsite interview具体情况，怎么联系你？

想问一下onsite要到下午几点呀

匿名用户 发表于 2022-09-21 14:48:08
想问一下onsite要到下午几点呀

不记得了，好像是9点到两点，中间休息一小时

What is the answer to the first round when you have to pay $1 to re-flip, simply re-flip everytime you get 0 or 1 heads?

楼主太猛了，感觉面试官故意找茬才挂，我猜楼主肯定很帅

能被找茬的都不简单