YCP Consus Interview Questions, Process, and Tips

Different types of joins include inner join, outer join, left join, and right join.

• Inner join: Returns rows when there is a match in both tables

• Outer join: Returns all rows when there is a match in one of the 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

ETL stands for Extract, Transform, Load. It is a process used to extract data from various sources, transform it into a consistent format, and load it into a target database or data warehouse.

• Extract: Data is extracted from different sources such as databases, files, APIs, etc.

• Transform: Data is cleaned, standardized, and transformed into a format suitable for analysis.

• Load: The transformed data is loaded into a target...read more

Use a LEFT JOIN to find values without relationships in other tables.

• Use a LEFT JOIN to join the table with other tables

• Filter the results where the relationship is NULL

Improving database performance can be achieved through optimization of queries, indexing, hardware upgrades, and regular maintenance.

• Optimize database queries by avoiding unnecessary joins and using appropriate indexes

• Regularly monitor and tune the database for optimal performance

• Consider hardware upgrades such as increasing memory or storage capacity

• Implement caching mechanisms to reduce the load on the database serve

It is difficult to provide an exact number as it varies depending on the specific location and day of the week.

• Burger sales can vary greatly depending on the popularity of the restaurant, day of the week, and time of year.

• Fast food chains like McDonald's or Burger King may sell thousands of burgers in a day.

• Local burger joints may sell a few hundred to a thousand burgers in a day.

• Special events or promotions can also i...read more