MISSING VALUE Interview Questions

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(a) first, write a function to calculate the hamming distance between two binary numbers (b) write a function that takes a list of binary numbers and returns the sum of the hamming distances for each pair (c) find a solution for (b) that works in O(n) time.
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Software Engineer

Interviewed at Meta

3.5
Apr 16, 2013

(a) first, write a function to calculate the hamming distance between two binary numbers (b) write a function that takes a list of binary numbers and returns the sum of the hamming distances for each pair (c) find a solution for (b) that works in O(n) time.

Two people are each stuck on their own island, connected by a ferryman with a lockable box. Each person has their own lock and key, but can't send the key along with the box. One person wants to send the other a diamond, but it must be placed into the box and locked or it will be stolen by the ferryman. How do you send the diamond without the ferryman stealing it?
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Software Engineer IV

Interviewed at Oracle

3.5
Apr 13, 2012

Two people are each stuck on their own island, connected by a ferryman with a lockable box. Each person has their own lock and key, but can't send the key along with the box. One person wants to send the other a diamond, but it must be placed into the box and locked or it will be stolen by the ferryman. How do you send the diamond without the ferryman stealing it?

They asked probability question: 1) The probability that item an item at location A is 0.6 , and 0.8 at location B. What is the probability that item would be found on Amazon website. 2). I have table 1, with 1million records, with ID, AGE (column names) , Table 2 with 100 records with ID and Salary then the interviewer gave me the following SQL script SELECT A.ID,A.AGE,B.SALARY FROM TABLE 1 A LEFT JOIN TABLE 2 B ON A.ID = B.ID + WHERE B.SALARY > 50000 ( HE ASKED TO MODIFY THIS LINE OF QUERY) How many records would be returned? 3. Give a csv file with ID, and Quantity columns, 50million records and size of data is 2gig, write a program in any language of your choice to aggregate the QUANTITY column.
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Data Scientist

Interviewed at Amazon

3.5
Oct 27, 2016

They asked probability question: 1) The probability that item an item at location A is 0.6 , and 0.8 at location B. What is the probability that item would be found on Amazon website. 2). I have table 1, with 1million records, with ID, AGE (column names) , Table 2 with 100 records with ID and Salary then the interviewer gave me the following SQL script SELECT A.ID,A.AGE,B.SALARY FROM TABLE 1 A LEFT JOIN TABLE 2 B ON A.ID = B.ID + WHERE B.SALARY > 50000 ( HE ASKED TO MODIFY THIS LINE OF QUERY) How many records would be returned? 3. Give a csv file with ID, and Quantity columns, 50million records and size of data is 2gig, write a program in any language of your choice to aggregate the QUANTITY column.

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