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Blackcoffer Senior Data Scientist Interview Questions and Answers

Updated 20 Dec 2024

Blackcoffer Senior Data Scientist Interview Experiences

1 interview found

Interview experience
3
Average
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed in Jun 2024. There were 2 interview rounds.

Round 1 - Assignment 

There was an assignment to be completed within the specified timeframe, focusing on natural language processing, which included various tasks such as web scraping, data cleaning, feature extraction, and other related activities. Following the completion of the assignment, there was a live coding and HR round that I found to be extremely challenging, especially for a fresher's role. The difficulty of the tasks assigned during the interview is quite high, even for experienced candidates. Overall, the interview process is very difficult to navigate; success can only come if you are exceptionally talented, very lucky, and possess a clear understanding of the concepts.

Round 2 - Technical 

(4 Questions)

  • Q1. They first requested a thorough explanation of the assignment we completed, including a detailed code explanation and the logic employed.
  • Q2. Live changes in the code of assignment are expected to be made during the Interview, such as adding a new feature or removing stop words, etc
  • Q3. General situation-based HR questions were asked, and asked “how would you respond to the scenarios presented?”
  • Q4. Questions based on technologies like AWS, GCP, Docker,etc

Interview Preparation Tips

Topics to prepare for Blackcoffer Senior Data Scientist interview:
  • Python
  • SQL
  • NLP
  • Pandas
  • Numpy
  • NLTK
  • Cloud
Interview preparation tips for other job seekers - The overall selection process is going to be tough and interviews of this company are very difficult to crack. So make sure your concepts are clear the assignment that you have been given must not be copied from the internet because their back and team truly checks the assignment, and if anything is matched from the internet, they immediately reject you. You will be expected to make real time changes in the assignment that you have made along with properly explaining the logic of your code during the interview. So make sure whatever role you are applying to your concepts. Should be clear and make sure you read the job description as inside the job description. Many technologies are mentioned And there might be questions asked about those technologies during the interview for an example during my data scientist role tech technologies like AWS, Google cloud platform, docker, python, SQL. These technology related questions were asked and my project was based on natural language processing that was given in the assignment was supposed to make live changes during the interview. They asked me to add few features, modifying the data inside a column, removing stop words, adding few more features, etc.

Interview questions from similar companies

Data Scientist Interview Questions & Answers

LTIMindtree user image Abhishek Srivastav

posted on 16 Mar 2015

Interview Questionnaire 

3 Questions

  • Q1. Code For parse Traingle
  • Ans. 

    Code for parsing a triangle

    • Use a loop to iterate through each line of the triangle

    • Split each line into an array of numbers

    • Store the parsed numbers in a 2D array or a list of lists

  • Answered by AI
  • Q2. Asci value along with alphabets(both capital and small)
  • Ans. 

    The ASCII value is a numerical representation of a character. It includes both capital and small alphabets.

    • ASCII values range from 65 to 90 for capital letters A to Z.

    • ASCII values range from 97 to 122 for small letters a to z.

    • For example, the ASCII value of 'A' is 65 and the ASCII value of 'a' is 97.

  • Answered by AI
  • Q3. Would you like to go for Hire studies

Interview Preparation Tips

Round: Test
Experience: First round was through Elitmus.
If you want to be in IT industry must appear it atleast once, for core also u can try it.
It's usually a tough exam but if u are good in maths , apti you will crack it.
Tips: Focus more on Reasoning part. this is the most difficult part.
practise paragraphs reading and solving(Average level)(Infosys level or less)
If you need any kind of help you can contact me via email or can even ring me.
I would recomend everybody to appear this exam with minimum of one month dedicated preparation
Duration: 120 minutes
Total Questions: 60

Round: Coding Round on their own plateform
Experience: It was little difficult to write codes on some other plateform. But time was enough to cope up.
Tips: Try writing as many programs you can write in C, C++ and JAVA not on paper, on compiler . while giving this exam you can select any of these three languages. Based on that your technical Interview will be taken.

Round: Technical Interview
Experience: Its easy one if you have hands on on programing
Tips: Explore and explore .

Round: HR Interview
Experience: Most difficult round for me(I feel myself a little weak in English). But stay calm. And be cheerful.
I still don't know the exact answer of the question but conversation gone for about 20 minutes on this topic.
He din't seem satisfied with me. Btw most of the people says to say no. You can take your call according to the situation.
Tips: Stay calm. Have as much Knowledge about the organisation. Try to make your Intro as much interesting as possible with achivements, hobbies etc. Ya English plays most important role here.

General Tips: Always have faith in yourself. And remember Everything happens for some good reason
Skill Tips: Dont go deep in OS, DBMS but have rough idea about all the topics
Skills: C, C++, DATA STRUCTURE, DBMS, OS
College Name: GANDHI INSTITUTE OF ENGINEERING AND TECHNOLOGY
Motivation: I wanted a job. :)
Funny Moments: A number of stories are there related to this job.
One is I already had an offer so I booked my ticket to home from Bangalore But at very last moment my father told me that you should never miss any chance, go for it. I went and interview date was postponded due to some reasons. I got a mail at 10:30 pm saying I have to attend interview next day morning at 8:30 pm. I ran to get printout of that mail. The venue was 3 hour journey from my place so I din't sleep for the whole night because i knew that if I ll sleep, I would not be able to wake up But I din't studied also because it would have lead to sleep. And Without having sleep and last moment study I made it.

Skills evaluated in this interview

I applied via Referral and was interviewed in Mar 2021. There were 4 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. What is data science
  • Ans. 

    Data science is the field of extracting insights and knowledge from data using various techniques and tools.

    • Data science involves collecting, cleaning, and analyzing data to extract insights.

    • It uses various techniques such as machine learning, statistical modeling, and data visualization.

    • Data science is used in various fields such as finance, healthcare, and marketing.

    • Examples of data science applications include fraud...

  • Answered by AI
  • Q2. What is phyton and R
  • Ans. 

    Python and R are programming languages commonly used in data science and statistical analysis.

    • Python is a general-purpose language with a large community and many libraries for data manipulation and machine learning.

    • R is a language specifically designed for statistical computing and graphics, with a wide range of packages for data analysis and visualization.

    • Both languages are popular choices for data scientists and hav...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Provide the tips how to face the interview

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. Please tell me something about yourself.What is your experience? What are your goals and ambitions?Why We should hire you? Strengths and weaknesses etc.

I applied via Recruitment Consultant and was interviewed in Mar 2021. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Explain about your projects

Interview Preparation Tips

Interview preparation tips for other job seekers - Interviewer was looking for Data science experience in infrastructure that is building a solution for remedy ticket
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. What is overfitting in machine learning?
  • Ans. 

    Overfitting occurs when a machine learning model learns the training data too well, including noise and outliers, leading to poor generalization on new data.

    • Overfitting happens when a model is too complex and captures noise in the training data.

    • It leads to poor performance on unseen data as the model fails to generalize well.

    • Techniques to prevent overfitting include cross-validation, regularization, and early stopping.

    • ...

  • Answered by AI
  • Q2. Overfitting accurs when a model learns the details.......etc
  • Ans. 

    Overfitting occurs when a model learns the details and noise in the training data to the extent that it negatively impacts the model's performance on new data.

    • Overfitting happens when a model is too complex and captures noise in the training data.

    • It leads to poor generalization and high accuracy on training data but low accuracy on new data.

    • Techniques to prevent overfitting include cross-validation, regularization, and...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Research the company before interview.
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Naukri.com and was interviewed in Nov 2023. There were 2 interview rounds.

Round 1 - Coding Test 

SQL, select statment and DDL commands

Round 2 - Technical 

(1 Question)

  • Q1. Python lists and conditional statements and loos
Interview experience
2
Poor
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Machine learning related questions and the theory of its operation
Interview experience
1
Bad
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. What kind of project you worked
  • Ans. 

    I have worked on projects involving predictive modeling, natural language processing, and computer vision.

    • Predictive modeling: Developed machine learning models to predict customer churn for a telecom company.

    • Natural language processing: Built a sentiment analysis tool to analyze customer reviews for a retail company.

    • Computer vision: Implemented a facial recognition system for access control in a secure facility.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Interviewer not in mood of listen. When he asked question he didn't even wait for answer and ask another question. Some kind of confused person I guess.
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Python coding questions followed by machine learning , deep learning algorithms

Blackcoffer Interview FAQs

How many rounds are there in Blackcoffer Senior Data Scientist interview?
Blackcoffer interview process usually has 2 rounds. The most common rounds in the Blackcoffer interview process are Assignment and Technical.
What are the top questions asked in Blackcoffer Senior Data Scientist interview?

Some of the top questions asked at the Blackcoffer Senior Data Scientist interview -

  1. They first requested a thorough explanation of the assignment we completed, inc...read more
  2. Questions based on technologies like AWS, GCP, Docker,...read more

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Blackcoffer Senior Data Scientist Interview Process

based on 1 interview

Interview experience

3
  
Average
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