Proftware Senior Data Analyst Interview Questions and Answers

Q1. Bias variance trade off
Add your answer
Q2. What is AB testing
Ans. 
AB testing is a method used to compare two versions of a webpage or app to determine which one performs better.
• AB testing involves creating two versions (A and B) of a webpage or app with one differing element

• Users are randomly assigned to either version A or B to measure performance metrics

• The version that performs better in terms of the desired outcome is selected for implementation

• Example: Testing two different call...read more
Answered by AI
Add your answer
Q3. Basic traditional ML question about ML metrics, bagging boosting etc.
Add your answer

It was a classification problem

Q1. Questions about assignment
Add your answer
Q2. Questions from resume.
Add your answer
Q3. Questions based on probability, statistics and loss functions
Add your answer

Q1. Explain about prev projects
Ans. 
I have worked on projects involving data analysis, visualization, and predictive modeling.
• Developed predictive models using machine learning algorithms

• Performed data cleaning and preprocessing to ensure data quality

• Created interactive dashboards for data visualization

• Collaborated with cross-functional teams to derive insights from data
Answered by AI
Add your answer
Q2. Windows function based sql question
Add your answer

Well designed to test the aptitude competence of the candidate.

Q1. Explanations for the answers given to the aptitude questions.
Add your answer
Q2. Questions from python.
Add your answer

Q1. Highlight the odd cells in excel
Ans. 
Use conditional formatting to highlight odd cells in Excel
• Select the range of cells you want to highlight

• Go to the 'Home' tab and click on 'Conditional Formatting'

• Choose 'New Rule' and select 'Use a formula to determine which cells to format'

• Enter the formula '=MOD(A1,2)=1' (assuming A1 is the top-left cell of your selected range)

• Choose the formatting style you want for the odd cells
Answered by AI
Add your answer
Q2. What are Joins in SQL, explain different joins and their outputs
Ans. 
Joins in SQL are used to combine rows from two or more tables based on a related column between them.
• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• INNER JOIN returns rows when there is at least one match in both tables

• LEFT JOIN returns all rows from the left table and the matched rows from the right table

• RIGHT JOIN returns all rows from the right table and the matched rows from the left table

• FU...read more
Answered by AI
Add your answer
Q3. Query to give running sum of salary
Ans. 
Use window function to calculate running sum of salary in SQL
• Use window function like SUM() with OVER() clause

• Partition the data by employee ID if needed

• Order the data by date or any other relevant column
Answered by AI
Add your answer

Q1. About CNN architecture and how it is relevant for textual data
Add your answer
Q2. Questions related to probability therom
Add your answer