摩根士丹利IT崗的面經分享

因為所在學校是大摩的Target School,所以相對比較容易得到面試。大摩只來我校招IT。面試官系一位老印，很Smart,面試過程中被我夸了好幾句。足見，我的表現是…廢話少說，亮題。

數學+程序的面試

Question 1:

In a deck of 52 card, what is the probability to have a hand of 13 cards that are from thesame suit?

My solution:

4 52

/

1 13

Your solution:52*12!/ 52!

/* 很顯然，對于簡單的題目，面試官Expect你回答出多種方法，而不僅僅是答案正確。 */

Question 2:

Cut one stick twice to turn it to be three sticks, what is the probability that the three sticksform a triangle?

My solution:

Set the length of the original stick to be l, the length of the first segment to be x, thelength of the second segment to be y, then the length of the third segment becomes (l-x-y)。

There are three constraints based on the rule “the sum of two edges of a triangle is greaterthan the length of the third edge.” I set up three inequalities.

The problem of my solution: Cannot obtain the final result within 5 minutes.

Your solution: (1/ 2)*(1/ 2)

/* 腦筋急轉彎。不能從傳統的數學方法求解，因為時間根本不夠的 */

Question 3:

I was given 100 integers listing from 1 to 100 without order. Then, an arbitrary valuefrom this list is missing. How to find which value it is?

/* 這可不是編程題哦，可我當時就是當編程題給他做了。Sigh,好在是做對了。*/

計算機相關問題：

Question 4:

What is Object Oriented programming (OOp)?

Question 5:

What is inheritance?

Question 6:

Does Java support multi-inheritance?

Other non-Math and non-Tech questions:

Instead of Goldman Sachs and JpM, why do I choose Morgan Stanley?

評價：

答題速度很關鍵，決定你的數學的熟練程度。基本上，IT部門的工作強度是比較大的，面試時務必保持旺盛的精力。還有，展示你的勤奮，鍥而不舍的精神。

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