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You got some baby bottle samples. You would like to know the max height you can drop it without breaking the bottle. Let set the unit as 1 foot. And the highest height you can reach is at N feet. So how would you find the (max) safe height?
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Software Development Engineer Intern

Interviewed at Amazon

3.5★
Jan 28, 2012

You got some baby bottle samples. You would like to know the max height you can drop it without breaking the bottle. Let set the unit as 1 foot. And the highest height you can reach is at N feet. So how would you find the (max) safe height?

Given a list of numbers and a rand(0,1) function, which returns a random integer between 0 and 1. Provide an algorithm to randomly sort the given list, based on the output of the rand() function, which should be called once for every number on the list. Code the solution in any language of your choice.
avatar

Software Development Engineer

Interviewed at Amazon

3.5★
Feb 28, 2012

Given a list of numbers and a rand(0,1) function, which returns a random integer between 0 and 1. Provide an algorithm to randomly sort the given list, based on the output of the rand() function, which should be called once for every number on the list. Code the solution in any language of your choice.

He asked the best way to store boolean values on memory. I said an array but he wanted more, so in the end I said BinaryVector class. He asked why a binary vector is a better option but I couldn't answer that. I told him that I don't know the internal implementation.
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Software Development Engineer

Interviewed at Amazon

3.5★
Feb 8, 2013

He asked the best way to store boolean values on memory. I said an array but he wanted more, so in the end I said BinaryVector class. He asked why a binary vector is a better option but I couldn't answer that. I told him that I don't know the internal implementation.

Problem solving: 1. Given a no. Find next highest no. containing same digits. 2. Given a array and a value k. Find all unique pairs that sums up to k. 3. Anagram check. 4. Given a array, i, j. Find all nos. such that j > i and array[j] > array[i]. 5. Boolean matrix problem. make all the values in a row or column as '1' if there is at least one '1' in that row or column. 6. Given a array where consecutive digits differences out to particular set of values and no. 'k'. Find the index of 'k'. Use hashing. Scripting: 1. Given a log file containing req ID and time consumed. Find all req. IDs consuming time more than certain seconds. Red ID: xyz Time: 10 2. Given a file containing 'Stundent,Marks'. Sum the marks of students and display totals marks student wise. I/P: Stud1,20 Stud2,30 Stud1,10 Stud2,30 O/P: Stud1,30 Stud2,60
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Applications Engineer

Interviewed at Amazon

3.5★
May 1, 2016

Problem solving: 1. Given a no. Find next highest no. containing same digits. 2. Given a array and a value k. Find all unique pairs that sums up to k. 3. Anagram check. 4. Given a array, i, j. Find all nos. such that j > i and array[j] > array[i]. 5. Boolean matrix problem. make all the values in a row or column as '1' if there is at least one '1' in that row or column. 6. Given a array where consecutive digits differences out to particular set of values and no. 'k'. Find the index of 'k'. Use hashing. Scripting: 1. Given a log file containing req ID and time consumed. Find all req. IDs consuming time more than certain seconds. Red ID: xyz Time: 10 2. Given a file containing 'Stundent,Marks'. Sum the marks of students and display totals marks student wise. I/P: Stud1,20 Stud2,30 Stud1,10 Stud2,30 O/P: Stud1,30 Stud2,60

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