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A line of 100 airline passengers is waiting to board a plane. They each hold a ticket to one of the 100 seats on that flight. (For convenience, let's say that the nth passenger in line has a ticket for the seat number n.) Unfortunately, the first person in line is crazy, and will ignore the seat number on their ticket, picking a random seat to occupy. All of the other passengers are quite normal, and will go to their proper seat unless it is already occupied. If it is occupied, they will then find a free seat to sit in, at random. What is the probability that the last (100th) person to board the plane will sit in their proper seat (#100)?
avatar

QA Analyst

Interviewed at J.P. Morgan

3.9★
Dec 3, 2011

A line of 100 airline passengers is waiting to board a plane. They each hold a ticket to one of the 100 seats on that flight. (For convenience, let's say that the nth passenger in line has a ticket for the seat number n.) Unfortunately, the first person in line is crazy, and will ignore the seat number on their ticket, picking a random seat to occupy. All of the other passengers are quite normal, and will go to their proper seat unless it is already occupied. If it is occupied, they will then find a free seat to sit in, at random. What is the probability that the last (100th) person to board the plane will sit in their proper seat (#100)?

I really can’t remember many of the questions I was asked throughout the interviews but I was given “homework” to complete and have emailed back that evening after the interview. 1. Summarization with who I had my interviews with. 2. Two reason why they shouldn't hire me. 3. 5 unconventional uses of a brick. 4. Flowchart of how to troubleshoot/ QA a broken toaster. 5. The most funny joke you know!!
avatar

Quality Assurance Analyst

Interviewed at Workiva

4.1★
Jan 14, 2013

I really can’t remember many of the questions I was asked throughout the interviews but I was given “homework” to complete and have emailed back that evening after the interview. 1. Summarization with who I had my interviews with. 2. Two reason why they shouldn't hire me. 3. 5 unconventional uses of a brick. 4. Flowchart of how to troubleshoot/ QA a broken toaster. 5. The most funny joke you know!!

Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person A can cross the bridge in 1 minute, B in 2 minutes, C in 5 minutes, and D in 8 minutes. When two people cross the bridge together, they must move at the slower person's pace. The question is, can they all get across the bridge in 15 minutes or less? Write an alogorithm to solve the puzzle.
avatar

QE

Interviewed at Zynga

4.1★
Jul 4, 2012

Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person A can cross the bridge in 1 minute, B in 2 minutes, C in 5 minutes, and D in 8 minutes. When two people cross the bridge together, they must move at the slower person's pace. The question is, can they all get across the bridge in 15 minutes or less? Write an alogorithm to solve the puzzle.

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