Hey guys I will be briefly sharing my interview experience at Sigmoid Analytics. There were 2 technical rounds. 

Round 1: Technical Round 1

Given an array, find the next greater element for all elements. 

• I was asked to give an optimized approach. 
• Given a tree, check if the tree is a Binary search tree or not

Round 2: Technical Round 2

• Given an array of numbers, find the maximum product triplet. 
• Different approaches were asked to optimize
• Check whether the string contains balanced parentheses. 

The questions were straightforward, but I realized that I made a small mistake in the first question of 2nd round, so could not make it to the HR round. 

All the best for your interview!