IRHPL Interview Questions and Answers

Code first and Database first are two approaches to create a database. Changes can be made from code side using migrations.

• Code first approach involves creating the database schema using code and then generating the database from it.

• Database first approach involves creating the database schema using a visual designer and then generating the code from it.

• Migrations can be used to make changes to the database schema from code side.

• Code first approach is more flexible and allows...read more

CTE is better for complex queries, temp tables for large data sets.

• CTE is more efficient for recursive queries and can improve readability.

• Temp tables are better for large data sets and can be indexed for faster performance.

• Consider the complexity and size of the data when choosing between CTE and temp tables.

Finding 2nd element from SQL without using WHERE clause.

• Use OFFSET and LIMIT clauses to skip the first row and select the second row.

• Order the result set by the desired column.

• Example: SELECT column_name FROM table_name ORDER BY column_name OFFSET 1 LIMIT 1;

Generics in C# allow for type-safe programming and code reusability.

• Generics allow for creating classes, interfaces, and methods that can work with any data type.

• They provide compile-time type safety and eliminate the need for type casting.

• Examples include List, Dictionary, and Nullable.

• Generics can improve code performance by reducing boxing and unboxing operations.

HAVING clause filters groups while GROUP BY groups data based on a column.

• GROUP BY is used to group data based on a column while HAVING is used to filter groups based on a condition.

• HAVING clause is used with GROUP BY clause to filter groups based on a condition.

• GROUP BY clause is used to group data based on a column and aggregate functions are used to perform calculations on each group.

• Example: SELECT department, COUNT(*) FROM employees GROUP BY department HAVING COUNT(*) > ...read more

Bootstrap is a CSS framework that provides pre-designed components and utilities, while TailwindCSS is a utility-first CSS framework that allows for more customization.

• Bootstrap provides pre-designed components like buttons, forms, and navigation bars, while TailwindCSS focuses on utility classes for styling.

• TailwindCSS allows for more customization and flexibility in styling compared to Bootstrap.

• Bootstrap requires more HTML markup for styling, while TailwindCSS uses utility...read more