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Blackbuck Insights Data Science Engineer Interview Questions and Answers

Updated 20 May 2021

Blackbuck Insights Data Science Engineer Interview Experiences

1 interview found

I applied via Naukri.com and was interviewed in Apr 2021. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Sql and coding

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare well about ur branch n coding

Interview questions from similar companies

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Tell me about spark internal memory management?
  • Ans. 

    Spark internal memory management involves allocating memory for storage, execution, and caching.

    • Spark uses a unified memory management system that dynamically allocates memory between storage and execution.

    • Memory is divided into regions for storage (cache) and execution (task memory).

    • Spark also uses a spill mechanism to write data to disk when memory is full, preventing out-of-memory errors.

    • Users can configure memory a...

  • Answered by AI
  • Q2. Difference between heap and non heap memory?
  • Ans. 

    Heap memory is used for dynamic memory allocation, while non-heap memory is used for static memory allocation.

    • Heap memory is used for storing objects created at runtime, while non-heap memory is used for storing class files and method information.

    • Heap memory is managed by garbage collector for automatic memory management, while non-heap memory is managed by the JVM.

    • Examples of heap memory include objects created using ...

  • Answered by AI

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. How to optimise php and mysql query
  • Ans. 

    Optimizing PHP and MySQL queries involves using indexes, optimizing queries, and reducing data transfer.

    • Use indexes to speed up data retrieval

    • Optimize queries by avoiding unnecessary joins and subqueries

    • Reduce data transfer by selecting only necessary columns

    • Use caching to avoid repetitive queries

    • Avoid using SELECT *

    • Use EXPLAIN to analyze query performance

  • Answered by AI

Skills evaluated in this interview

Interview Questionnaire 

2 Questions

  • Q1. There was so many questions asked to me in interview, i had gone through four different rounds of interview.
  • Q2. I was well prepared for the interview. I didn't know that there will be four rounds. I have faced them confidently with accurate answers within a time. They had impressed on my confidence and my verbal com...

Interview Questionnaire 

2 Questions

  • Q1. What is DHCP,DNS,etc
  • Ans. 

    DHCP is a protocol that assigns IP addresses to devices on a network. DNS is a system that translates domain names to IP addresses.

    • DHCP assigns IP addresses to devices on a network

    • DNS translates domain names to IP addresses

    • DHCP reduces the need for manual IP address configuration

    • DNS allows users to access websites using domain names instead of IP addresses

  • Answered by AI
  • Q2. Dynamics host configuration Protocol Domain Name System

Skills evaluated in this interview

I applied via Walk-in and was interviewed before Jan 2021. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Prime number star pattern Js basics form validations

Interview Preparation Tips

Interview preparation tips for other job seekers - Learn all basics of JS and node
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Recruitment Consulltant and was interviewed before Feb 2022. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. Given a string, find the longest length palindromic substring in the given string.
  • Ans. 

    Find the longest palindromic substring in a given string.

    • Use dynamic programming to solve the problem efficiently.

    • Start with the base cases of single characters and two characters.

    • For longer substrings, check if the first and last characters match and if the substring between them is also a palindrome.

    • Keep track of the longest palindrome seen so far.

    • Time complexity: O(n^2), space complexity: O(n^2).

  • Answered by AI
Round 3 - Technical 

(2 Questions)

  • Q1. Mention the most challenging technical problem you had to solve.
  • Ans. 

    Developing a real-time data processing system for a high-traffic website.

    • Designing a scalable architecture to handle the high volume of incoming data.

    • Optimizing the data processing algorithms to minimize latency.

    • Ensuring data consistency and accuracy in a distributed system.

    • Implementing fault-tolerant mechanisms to handle system failures.

    • Testing and debugging the system under various load conditions.

  • Answered by AI
  • Q2. Some minor low level entity design.

Interview Preparation Tips

Interview preparation tips for other job seekers - Practice DSA, some design patterns and low level design properly

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
-
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via LinkedIn and was interviewed before Jun 2023. There were 3 interview rounds.

Round 1 - HR 

(1 Question)

  • Q1. About the experience and what I did
Round 2 - Coding Test 

Give me a palindrom of string related question

Round 3 - Technical 

(1 Question)

  • Q1. System design based on how to scale something
  • Ans. 

    To scale a system, consider horizontal and vertical scaling, load balancing, caching, database sharding, and microservices architecture.

    • Implement horizontal scaling by adding more instances of the application to distribute the load.

    • Consider vertical scaling by upgrading the hardware resources of the existing server.

    • Use load balancing to evenly distribute incoming network traffic across multiple servers.

    • Implement cachin...

  • Answered by AI

Skills evaluated in this interview

Round 1 - Coding Test 
Round 2 - HR 

(1 Question)

  • Q1. Tell me about yourself.

Interview Preparation Tips

Interview preparation tips for other job seekers - Just be confident and tell whatever you had Learnt

I applied via Naukri.com and was interviewed in Dec 2021. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Tree, bfs and dfs and dynamic programming is asked mainly, medium level leetcode questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Brush up dfs bfs and medium lc, a little bit of system design and sql too

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