Koch Business Solutions Senior Data Analyst Interview Questions and Answers

Q1. Tell me about Spark architecture
Ans. 
Spark architecture is a distributed computing framework that consists of a cluster manager and worker nodes.
• Spark architecture includes a driver program, cluster manager, and worker nodes.

• The driver program is responsible for dividing the Spark application into tasks and scheduling them on the worker nodes.

• Worker nodes execute the tasks and return the results to the driver program.

• Spark can run on various cluster manag...read more
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Q1. About ETL performance and mapping
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Q2. About SQL advanced Query
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Time vs money, time time time

Dsa, python sql etl ssis

Easy aptitude test, not much to do

Q1. Explain about your previous project
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Q2. Do you know about Scan Data ? What is it ?
Ans. 
Scan data refers to the information collected from scanning barcodes or QR codes, typically used in retail to track sales and inventory.
• Scan data is collected by scanning barcodes or QR codes on products.

• It is commonly used in retail to track sales, inventory levels, and pricing.

• Scan data can provide valuable insights into consumer behavior and preferences.

• Examples of scan data systems include point-of-sale (POS) syste
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Q3. Do you know about panel data ? what is it ?
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Panel data is a type of longitudinal data that involves observations on multiple subjects over multiple time periods.
• Panel data is also known as longitudinal data or cross-sectional time series data.

• It allows for the analysis of both individual and time effects.

• Examples include tracking the same group of individuals over time to study changes in their behavior or characteristics.

• Panel data is commonly used in economics
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Q4. What do you know about Nielsen business ?
Ans. 
Nielsen is a global measurement and data analytics company that provides insights into consumer behavior.
• Nielsen is known for its TV ratings system, which measures viewership for television programs.

• They also provide data on consumer purchasing habits and trends for various industries.

• Nielsen operates in over 100 countries and has a wide range of services including market research, audience measurement, and advertising...read more
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Q5. Have you used Power BI ? and various types of visualization in Power BI
Ans. 
Yes, I have used Power BI for various types of visualization including bar charts, line charts, pie charts, and maps.
• I have experience creating bar charts to visualize sales data over time.

• I have used line charts to show trends in customer engagement metrics.

• I have utilized pie charts to display market share data.

• I have incorporated maps to visualize geographic distribution of sales.
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Q1. Python sql etl aws azure related qns
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Q1. Why you select tcs?
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Q2. What is your expectations in tcs?
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Q3. How many day you need to learn tcs process?
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Q1. Given a query which had the application of aggregated finction subquery and sql functions
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Q2. Another question on application of Having clause
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Normal aptitude tests questions

Q1. General field knowledge for the position.
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Q2. Experience in previous company and learnings attitude of candidates.
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