Investment Banking & Asset Management interview questions

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“10 ropes with red and blue end. red end can only connect blue end. what is the expected value of cycles?”

“class A {
    public A() {

    public void foo() {
            System.out.println("Class A");

class B extends A {
    public B(){}


“3) Poker. 26 red, 26 black. Take one every time, you can choose to guess whether it’s red. You have only one chance. If you are right, you get 1 dollar. What’s the strategy? And what’s the expected…”

Trader at Jane Street

Mar 6, 2012

“A has 5 fair coins and B has 4 fair coins. A wins only if he flips more heads than B does. Probability of A winning?”

“Coin Triplets Problem
Denote H for head, T for tail in a coin flip.
Flip a fair coin many times until either a pattern of HHT or HTT occurs. What's the probability that HHT occurs before HTT…”

“What is the last digit in the solution to 3^33?”

“You are in a room with 100 lights, initially all off. If you first toggle every light, then every second, and so forth up to 100, which lights will be on at the end?”

“There are 20 floors in a building. If you're on an elevator and you're trying to get to the 20th floor, what is the probability that 4 people ahead of you click the 20th floor before you do? Assuming…”

“Calculate e^5 up to two decimal numbers without calculation”

“how many times the hour and minute hands of the clock form right angle during one day?”

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