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R square is a statistical measure that represents the proportion of the variance for a dependent variable that's explained by an independent variable.
R square is also known as the coefficient of determination.
It ranges from 0 to 1, with 1 indicating a perfect fit.
It is used to evaluate the goodness of fit of a regression model.
Higher R square values indicate that the model explains a larger proportion of the variance i...
Model fit can be checked using various statistical measures and techniques.
Check goodness of fit statistics like R-squared, AIC, BIC
Analyze residuals to ensure they are normally distributed and homoscedastic
Use diagnostic plots like QQ plots, residual plots, and leverage plots
Perform cross-validation to assess model performance on unseen data
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I applied via Naukri.com and was interviewed in Oct 2020. There were 5 interview rounds.
I applied via Campus Placement and was interviewed in Feb 2022. There was 1 interview round.
I applied via Naukri.com and was interviewed in Jul 2024. There were 2 interview rounds.
I applied via Naukri.com and was interviewed before Sep 2023. There were 2 interview rounds.
Built an end to end ETL pipeline in Alteryx for data processing and analysis.
Extracted data from multiple sources such as databases, APIs, and flat files.
Transformed the data by cleaning, filtering, and joining datasets to create a unified view.
Loaded the processed data into a data warehouse or visualization tool for analysis.
Used Alteryx tools like Input Data, Filter, Join, and Output Data to build the pipeline.
Transpose reorganizes data from rows to columns, while Cross Tab summarizes data in a tabular format.
Transpose converts rows to columns based on a specified key field.
Cross Tab summarizes data by grouping values from one or more fields into a tabular format.
Transpose is used for restructuring data, while Cross Tab is used for aggregating data.
I applied via Naukri.com and was interviewed in Jan 2022. There was 1 interview round.
I applied via LinkedIn and was interviewed in May 2021. There were 3 interview rounds.
I applied via Naukri.com and was interviewed before Sep 2020. There were 5 interview rounds.
I applied via Campus Placement and was interviewed before Mar 2023. There were 4 interview rounds.
30 mins, Aptitude questions
SQL queries and bascis Python questions
Using subqueries in SQL allows for more complex queries by nesting queries within other queries.
Subquery in SELECT statement: SELECT column_name FROM table_name WHERE column_name = (SELECT column_name FROM table_name)
Subquery in WHERE clause: SELECT column_name FROM table_name WHERE column_name IN (SELECT column_name FROM table_name)
Subquery in FROM clause: SELECT column_name FROM (SELECT column_name FROM table_name) A
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R.R. Donnelley