# Probability Interview Questions

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“Given a stream of integers of unknown (possibly large) length, how would you pick one at random? Now prove its random.” |

“• Is 1027 a prime number? • How would you write an algorithm that identifies prime numbers? • 2 blue and 2 red balls, in a box, no replacing. Guess the color of the ball, you receive a dollar if...” |

“Toss 4 coins. For each head shown, the play gets 1000$. Given a 2nd chance to play the game again. what's the strategy of the game and what's the expectation of the game.” |

“You have two decks of cards, one normal 52-card deck and one 104-card deck with double every card. Is one deck better than the other if you wanted to get two black cards in a row?” |

“How would you show a correlation between two types of data?” |

“IMDB 2.0 - Movie DB Table Structure Your best friend Betty thinks IMDB is too complicated and challenges you to create a simple movie web site. One page will display movies (with movie name, date it...” |

“A stick randomly breaks into 3 pieces, what is the possibility that it forms a triangle” |

“What is a normal distribution? What would you think if your data didn't fit one?” |

“Given a coin flipping game, in which player A looks for the sequence HTH and player B looks for the sequence HTT, what is the probability that player A encounters its sequence first (and the game...” |

“Given a random variable X and its distribution P(X), and a function y(x), what can you tell me about the distribution P(y(x))?” |

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