Developer Database Oracle Interview Questions

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I am in a 100-story building. I have with me two glass balls. I know that if I throw the ball out of the window, it will not break if the floor number is less than X, and it will always breaks if the floor number is equal to or greater than X. Assuming that I can reuse the balls which don't break, find X in the minimum number of throws.
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Software Developer

Interviewed at FINRA

3.8
Aug 25, 2013

I am in a 100-story building. I have with me two glass balls. I know that if I throw the ball out of the window, it will not break if the floor number is less than X, and it will always breaks if the floor number is equal to or greater than X. Assuming that I can reuse the balls which don't break, find X in the minimum number of throws.

Given a set of inputs <number, userid> in a log file: log: <number, userid> example: 1,2 1,1 2,1 3,1 1,2 out: <number, count> 1,2 2,1 3,1 The output should be all the unique numbers and the count associated with them.
avatar

Software Engineer

Interviewed at Meta

3.5
Aug 28, 2009

Given a set of inputs <number, userid> in a log file: log: <number, userid> example: 1,2 1,1 2,1 3,1 1,2 out: <number, count> 1,2 2,1 3,1 The output should be all the unique numbers and the count associated with them.

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