SIG 电面面经,共三轮

就把总共三轮电面的题目一起贴在这里了,挂在rank(第5题)这个题目了应该.大神们欢迎来讨论~~~每一轮也有问一点简历相关技能,但不多.晚点会陆续回报地里面经,因为还在面试中,时间也蛮紧张的,一起努力!

  1. 我和你每个人有两个骰子,同时扔骰。如果你扔的筛子中的两个数字有任意一个和我掷出的相同,我赢1刀。如果你扔的两个数字均和我掷出的不同,你赢1刀。请问你要不要玩这个游戏?
    对手两色一样概率1/6,不一样5/6。一样时候我输概率25/36,不一样时候16/36。总概率1/625/36+5/616/36=105/216<1/2

  2. Youand I each has 3 coins. We start to toss and count the number ofhead. If we have the same number, I win $2, and if different you win$1. Will you play this game?

sol: Iwin probabilities: (1/8)^2+ (3/8)^2 + (3/8)^2 + (1/8)^2 = 20/64;
my expectation 220/64 – 1(1-20/64) < 0 ,you will play

  1. 3 horse, racing, you could buy ticket 1 dollar to bet on each horsewin. The profit you could win from the three are 2,4, and 6 dollars,how do you play this game?

  2. Generate a uniformly distribution in a disk;
    The expectation of generatingZ= 1000 points, the number fall in the disk;
    Thestandard deviation of Z;

  3. A^2 has rank 0, the rank of A?

请问楼主面的什么职位?

Quant researcher