Udemy Senior Data Scientist Interview Questions and Answers

Question was moderate.based on logical reasoning and math.

Coding test question based on sql and python.

Q1. How would you sell to the well established customer
Ans. 
To sell to a well established customer, focus on building a strong relationship and providing personalized solutions.
• Research the customer's history and preferences

• Offer tailored solutions that meet their specific needs

• Provide excellent customer service and follow-up

• Build trust and rapport through regular communication

• Highlight the benefits and value of your product or service

• Offer incentives or loyalty programs to enc
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General topics - current affairs

Q1. Manager round - HOD
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Q2. Tell me about yourself
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Q1. Tell me something about yourself
Ans. 
I am a data analyst with a strong background in statistics and programming, passionate about deriving insights from data.
• I have a Bachelor's degree in Statistics and experience in data visualization tools like Tableau

• I am proficient in programming languages such as Python and SQL

• I have worked on projects involving predictive modeling and data mining techniques
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Q2. Some question related to Python
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2.5 Hours 2 Coding que and sql query and topin tech platform

Q1. Based on boolean matrix
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Q2. Find k closest node of given given node in a BST.
Ans. 
Find k closest nodes to a given node in a BST.
• Perform an inorder traversal of the BST to get a sorted list of nodes.

• Use a priority queue to keep track of the k closest nodes based on their absolute difference with the target node.

• Populate the priority queue with the first k nodes from the inorder traversal.

• For each subsequent node, calculate its absolute difference with the target node and compare it with the top eleme...read more
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SQL, Analytical, Maths

Q1. SQL qsn on some data
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Q2. Qsn on LLMs in company
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Any general knowledge topic

Q1. Tell me about yourself
Ans. My Name is Sujitha Rajendran.I have completed Master of Business Economics at Ethiraj College for women. I am from Namakkal district and searching for job opportunities now. My Father is a business man. My Mother is a home maker and My Brother is a Software Engineer
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Q2. Strength and weakness
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Q3. Short term and long term goal
Ans. 
Short term goal is to enhance data analysis skills, long term goal is to become a data science expert.
• Short term goal: Improve proficiency in SQL, Python, and data visualization tools

• Long term goal: Obtain advanced certifications in machine learning and AI

• Short term goal: Complete online courses on statistical analysis and data cleaning

• Long term goal: Lead data science projects and mentor junior analysts
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Q4. Why did you chosen this company?
Ans. My Strength is that I am not only a hard working person but also a smart working person. I am a quick learner and self motivational person. I am a good team player, good listener and good in time management
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Q5. Why we want to hire you?
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Q6. Salary discussion
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Two Medium DSA problem to solve

Q1. Design scalable Streaming pipeline and
Ans. 
Design a scalable streaming pipeline for processing large volumes of data.
• Use a distributed streaming framework like Apache Kafka or Apache Flink for real-time data processing.

• Implement data partitioning and parallel processing to handle high data throughput.

• Utilize cloud services like AWS Kinesis or Google Cloud Pub/Sub for scalability and reliability.

• Include fault tolerance mechanisms like checkpointing and data repl...read more
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Q1. LLD round , write classes and its methods
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Q1. Salary and benefits discussion
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