Smart Energy Water Interview Questions, Process, and Tips

Round duration - 65 minutes
Round difficulty - Medium

it was a technical round consists of aptitude questions and coding round.

Q1. 
Majority Element Problem Statement
Given an array/list 'ARR' consisting of 'N' integers, your task is to find the majority element in the array. If there is no majority element present, return -1.
Exampl...read more
Ans. 
Find the majority element in an array, return -1 if no majority element exists.
• Iterate through the array and keep track of the count of each element using a hashmap.

• Check if any element's count is greater than floor(N / 2) to determine the majority element.

• Return the majority element or -1 if no majority element exists.
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Q2. 
Rotate Matrix to the Right
You are provided with a matrix MAT of size 'N' * 'M', where 'N' is the number of rows and 'M' is the number of columns. Your task is to rotate the matrix to the right 'K' times,...read more
Ans. 
Rotate a matrix to the right 'K' times by shifting each column to the right 'K' times.
• Iterate 'K' times to perform right rotation on the matrix

• Shift each column to the right by one position in each iteration

• Handle the edge cases where 'K' is greater than the number of columns
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Round duration - 20 minutes
Round difficulty - Medium

I was asked to solve problems based on NLP,DBMS,ML. Some of them were situational based questions.

Q1. 
Postfix Expression Evaluation Problem Statement
Given a postfix expression, your task is to evaluate the expression. The operator will appear in the expression after the operands. The output for each expr...read more
Ans. 
Evaluate postfix expressions by applying operators after operands. Return result modulo (10^9+7).
• Iterate through each character in the postfix expression

• If character is an operand, push it onto the stack

• If character is an operator, pop two operands from stack, apply operator, and push result back

• Continue until end of expression, return final result modulo (10^9+7)
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