One97 Interview Experience | Set 3 (Backend/Node js Developer)

Round 1
Q1. Multiply two 2d matrices

Q2 You are given a stack in which element are filled at runtime. And normal push and pop operation. Now write a function min which you minimum element in stack at any particular instance.

Round 2
Q1 Given an array of size n contains element from 1 to n in any order(unsorted). Now one element is dublicate. Find that element without using extra space.

Q2 Given an array which contains the repeated element in consecutive order. Now write a recursive function which removes consecutive elements from the array.

Q3 Givn an array find subarray which has zero sum.

Q4 Some talk on node js. and its event-driven model. Why we use ngnix as a proxy server.

Q5. Find the number of unique visitors on a website having traffic upto 0.5 million daily(let’s say). How will you number of unique visitors?

Q6 Given a histogram find maximum area of rectangle.

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