# Quantitative Research Analyst Interview Questions

Quantitative research analyst interview questions shared by candidates

## Top Interview Questions

The phone interview went in depth into past research. Be prepared to discuss it. Here is a list of must learn/buy books in probability theory. Good for these positions http://bayesianthink.blogspot.com/2012/12/the-best-books-to-learn-probability.html |

well all questions were all right. |

You are given an array of integers, A1, A2, ..., An, including negatives and positives, and another integer S. Now we need to find three different integers in the array, whose sum is closest to the given integer S. If there exists more than one solution, any of them is ok. Is there an algorithm to find the three integers in O(n^2) time? |

Why Acumen? |

Suppose there is a series of 100 light bulbs labeled 1 through 100 that all start in the off position. Person 1 walks in the room and turns on every light bulb. Person 2 walks in the room and flips the switch on every 2nd light bulb (i.e. he turns off all even numbered light bulbs). Person 3 walks in the room and flips the switch on every 3rd light bulb (turning some on and some off). This process continues until person 100 goes through and flips the switch on the 100th light bulb. Which light bulbs will be lit up at the end? |

Cloud raining or no cloud raining |

Can you tell anything about the correlation of the security who has variance pointing high and low ? |

Describe what does eigenvector physically means ? |

What is fourier transform of Guassian ? |

They asked me if own a TV, I said hell no. |

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