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I applied via LinkedIn and was interviewed before Aug 2023. There were 2 interview rounds.
Union combines and removes duplicates, Union All combines without removing duplicates.
Union combines result sets and removes duplicates
Union All combines result sets without removing duplicates
Union is slower than Union All as it involves removing duplicates
Example: SELECT column1 FROM table1 UNION SELECT column1 FROM table2;
Example: SELECT column1 FROM table1 UNION ALL SELECT column1 FROM table2;
To show top 5 in pandas, use the nlargest() function.
Use the nlargest() function with the 'n' parameter set to 5 to get the top 5 values in a pandas DataFrame.
For example: df['column_name'].nlargest(5) will return the top 5 values in the specified column.
A scatter plot is a better representation for 3 numerical columns.
Use a scatter plot to show the relationship between the numerical columns.
Scatter plots are effective for visualizing correlations and patterns in data.
Each point on the plot represents a data point with values from all 3 columns.
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I applied via Naukri.com and was interviewed in Oct 2022. There were 4 interview rounds.
Mathematics, English and Reasoning..
Python is a high-level, interpreted programming language used for web development, data analysis, artificial intelligence, and more.
Python is easy to learn and has a simple syntax.
It is used for web development with frameworks like Django and Flask.
Python is popular for data analysis and visualization with libraries like Pandas and Matplotlib.
It is used for artificial intelligence and machine learning with libraries li...
I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.
SQL Joins are used to combine rows from two or more tables based on a related column between them.
SQL Joins are used to retrieve data from multiple tables based on a related column between them.
Common types of SQL Joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;
Python numpy provides various functions for numerical operations on arrays.
numpy.sum() - calculates the sum of array elements
numpy.mean() - calculates the mean of array elements
numpy.max() - returns the maximum value in an array
numpy.min() - returns the minimum value in an array
numpy.std() - calculates the standard deviation of array elements
I applied via Referral and was interviewed before Jun 2023. There were 2 interview rounds.
Simple SQL questions
I applied via Naukri.com and was interviewed before Jun 2022. There were 3 interview rounds.
They gave me case study in interview based on that I had provide the solution.
I applied via Campus Placement and was interviewed in Feb 2022. There was 1 interview round.
Joins are used in databases to combine rows from two or more tables based on a related column between them.
Joins are used to retrieve data from multiple tables based on a related column between them
Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
Processing speed of scripting languages varies based on factors like code complexity and optimization.
Processing speed can vary based on the specific task being performed.
Compiled languages like C++ tend to be faster than interpreted languages like Python.
Optimizing code can improve processing speed.
JavaScript can be faster than Python for certain tasks.
Consider using libraries or frameworks optimized for performance.
I applied via Naukri.com and was interviewed in Jul 2024. There was 1 interview round.
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