* You have a data structure of integers, which can be negative, zero, or positive, and you need to support an API with two public methods, insert(int) and getmedian(). Describe a data structure you would use to support this API and describe the running time of the two methods. * Imagine you're writing a function that takes an array of integers and an integer and it needs to return true if any pair in the array sum to the 2nd argument. The array can have negative numbers, zero, or positive numbers. Describe how you would design this function and what its running time would be. I ran through the trivial n^2 solution, then modified it to an nlogn and finally to a linear solution.
Enginner Interview Questions
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Find the maximum difference in an unsorted array with the index of max greater than min. array cant be sorted
Given a function for a fair coin, write a function for a biased coin that returns heads 1/n times (n is a param).
Given a multi-step product feature, write SQL to see how well this feature is doing (loading times, step completion %). Then use Python to constantly update average step time as new values stream in, given that there are too many to store in memory.
SQL: 1. Percentage increase in revenue compared to promoted and non-promoted products. 2. Products classes that has the highest transactions 3. Count of Customers who bought 2 items type (A,B) 4. Don't remember Python: 1. Average length of letters to words. 2. Parse an ip address (This is a favourite FB question) 3. [[A],[A,B],[A,C],[B,D],[C,A]] -- Find the alphabet with highest neighbors? -- (Wasnt able to solve because of time limit but the interviewer was like I get what I want to convey.. I gave her an algo of what I would I have done)
The first one is, given a tree, each node contains a digit. Calculate the sum of all numbers formed by paths from root to leaf. The second one is given a string, remove all 'b's and duplicate all 'a's.
My 30 min coding question was related to tree where all nodes were managers each node has a value which was the number of months they worked.We have to find the maximum tenure which is I remember can be calculated using the average of its child nodes.
code a function that takes 2 parameters and an algorithm, print out all the numbers between the 2 parameters that completes the algorithm
In python code, given a json object with nested objects, write a function that flattens all the objects to a single key value dictionary. Do not use the lib that actually performs this function. { a:{b:c,d:e} } becomes {a_b:c, a_d:e} ( not, a:"b:c,d:e" }
1 of very few questions that were not in STAR format: where do you see yourself in the next 5 years? (This is not a question about your ambition for the future, it's about whether you plan on sticking with this position in GM)
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