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Presidio Solutions Pvt Ltd
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I applied via Referral and was interviewed in Jan 2024. There was 1 interview round.
SQL leet code questions
Top trending discussions
posted on 10 Nov 2015
I appeared for an interview before Oct 2020.
Round duration - 40 minutes
Round difficulty - Medium
Asked about time complexity of algorithm, puzzles, DBMS, cutting edge technologies etc. What are indexes?
Given an array of integers ARR
of size N, consisting of 0s and 1s, you need to select a sub-array and flip its bits. Your task is to return the maximum count of 1s that can b...
Given an array of 0s and 1s, find the maximum count of 1s by flipping a sub-array at most once.
Iterate through the array and keep track of the maximum count of 1s obtained by flipping a sub-array.
Consider flipping a sub-array from index i to j and calculate the count of 1s in the resulting array.
Return the maximum count of 1s obtained by flipping a sub-array at most once.
Round duration - 20 minutes
Round difficulty - Medium
Asked 1 standard algorithm
You are provided with a 2-dimensional matrix having N
rows and M
columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...
Count the number of islands in a 2D matrix of 1s and 0s.
Iterate through the matrix and perform depth-first search (DFS) to find connected 1s.
Mark visited cells to avoid redundant traversal.
Increment island count whenever a new island is encountered.
Tip 1 : prepare for competitive programming
Tip 2 : know about standard algorithm
Tip 3 : must be good with dbms
Tip 1 : must have projects, which you can explain to them
Tip 2 : have things on resume, that you are totally certain about.
posted on 22 Jan 2023
I applied via Campus Placement and was interviewed in Jul 2022. There were 4 interview rounds.
Aptitude+coding was asked. Consider this as the very important selection criteria
Design test . Its very likely to be easy
I applied via LinkedIn and was interviewed in Nov 2021. There were 4 interview rounds.
posted on 30 Oct 2023
I applied via Campus Placement and was interviewed in Sep 2023. There were 2 interview rounds.
Easy and good English passage reading
posted on 27 Mar 2024
I applied via Approached by Company and was interviewed in Sep 2023. There were 2 interview rounds.
Use SQL query with subquery to find nth highest salary
Use ORDER BY and LIMIT to get the nth highest salary
Use a subquery to exclude the top n-1 salaries before selecting the nth highest salary
posted on 7 Jan 2025
I applied via Approached by Company and was interviewed before Jan 2024. There were 3 interview rounds.
Basics of SQL, Python
Experience based questions, SQL and Python
I have worked on projects involving building data pipelines, optimizing data storage, and developing machine learning models.
Built data pipelines using Apache Spark and Airflow
Optimized data storage by implementing partitioning and indexing strategies
Developed machine learning models for predictive analytics
based on 2 interviews
Interview experience
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