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To read a JSON file, use a programming language's built-in functions or libraries to parse the file and extract the data.
Use a programming language like Python, Java, or JavaScript to read the JSON file.
Import libraries like json in Python or json-simple in Java to parse the JSON data.
Use functions like json.load() in Python to load the JSON file and convert it into a dictionary or object.
Access the data in the JS...
Spark cluster configuration involves setting up memory, cores, and other parameters for optimal performance.
Specify the number of executors and executor memory
Set the number of cores per executor
Adjust the driver memory based on the application requirements
Configure shuffle partitions for efficient data processing
Enable dynamic allocation for better resource utilization
Approximately 1.5-2 million cars are sold in Delhi annually.
Consider population of Delhi (approx. 20 million)
Assume car ownership rate (approx. 10%)
Factor in replacement rate and new buyers
A self join in SQL allows a table to be joined with itself to compare rows within the same table.
Self joins are useful for hierarchical data, like employee-manager relationships.
Example: SELECT a.EmployeeID, a.Name, b.Name AS ManagerName FROM Employees a JOIN Employees b ON a.ManagerID = b.EmployeeID;
You can use aliases to differentiate between the two instances of the same table.
Self joins can also be used to fin...
Query to retrieve the third transaction of every user
Use a subquery to rank the transactions for each user
Filter the results to only include the third transaction for each user
Query to output the name of credit card and number of cards issued in launch month
Use GROUP BY to group by launch month
Count the number of cards issued in each launch month
Select the name of the credit card and the count of cards issued
LatentView offers a dynamic work environment with opportunities for growth and learning in the field of analytics.
LatentView has a strong reputation in the analytics industry for delivering innovative solutions to clients.
The company values continuous learning and development, providing employees with opportunities to enhance their skills.
LatentView offers a collaborative work culture where employees can work on d...
Estimate the average milk consumption in a city using population and consumption per person.
Determine the population of the city. For example, if the city has 1 million residents.
Estimate average milk consumption per person. For instance, if each person consumes about 1 liter of milk per week.
Calculate total weekly consumption: 1 million people * 1 liter = 1 million liters per week.
Convert weekly consumption to mo...
SQL queries using joins and window functions to analyze and manipulate data effectively.
Joins combine rows from two or more tables based on a related column. Example: SELECT * FROM orders JOIN customers ON orders.customer_id = customers.id;
Window functions perform calculations across a set of table rows related to the current row. Example: SELECT employee_id, salary, RANK() OVER (ORDER BY salary DESC) AS salary_ra...
Use SQL query with subquery to find nth highest salary
Use ORDER BY and LIMIT to get the nth highest salary
Use a subquery to exclude the top n-1 salaries before selecting the nth highest salary
I applied via Campus Placement
Gamification round Game gamification
Data analytics related topic
Databricks is a unified data analytics platform that includes components like Databricks Workspace, Databricks Runtime, and Databricks Delta.
Databricks Workspace: Collaborative environment for data science and engineering teams.
Databricks Runtime: Optimized Apache Spark cluster for data processing.
Databricks Delta: Unified data management system for data lakes.
To read a JSON file, use a programming language's built-in functions or libraries to parse the file and extract the data.
Use a programming language like Python, Java, or JavaScript to read the JSON file.
Import libraries like json in Python or json-simple in Java to parse the JSON data.
Use functions like json.load() in Python to load the JSON file and convert it into a dictionary or object.
Access the data in the JSON fi...
To find the second highest salary in SQL, use the MAX function with a subquery or the LIMIT clause.
Use the MAX function with a subquery to find the highest salary first, then use a WHERE clause to exclude it and find the second highest salary.
Alternatively, use the LIMIT clause to select the second highest salary directly.
Make sure to handle cases where there may be ties for the highest salary.
Spark cluster configuration involves setting up memory, cores, and other parameters for optimal performance.
Specify the number of executors and executor memory
Set the number of cores per executor
Adjust the driver memory based on the application requirements
Configure shuffle partitions for efficient data processing
Enable dynamic allocation for better resource utilization
I applied via Approached by Company and was interviewed in Sep 2024. There was 1 interview round.
I applied via Campus Placement
Normal Aptitude Test
Python or SQL coding round
Query to retrieve the third transaction of every user
Use a subquery to rank the transactions for each user
Filter the results to only include the third transaction for each user
Query to output the name of credit card and number of cards issued in launch month
Use GROUP BY to group by launch month
Count the number of cards issued in each launch month
Select the name of the credit card and the count of cards issued
4 SQL questions, complexity 7/10
I worked on various projects involving data analysis, market research, and process optimization across different industries.
Conducted a market analysis project for a tech startup, identifying key trends and customer preferences.
Developed a predictive model for sales forecasting using historical data, improving accuracy by 20%.
Collaborated with cross-functional teams to streamline reporting processes, reducing time spen...
Aptitude test was easy, you can prepare it with online available resources
We were asked to complete few games which were related to logical thinking
It was a common topic and was 1 hour long
Top trending discussions
Some of the top questions asked at the LatentView Analytics interview -
The duration of LatentView Analytics interview process can vary, but typically it takes about less than 2 weeks to complete.
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