Interview Questions and Answers

The question is asking to select a column named 'columnname' as '1' from the employee table and provide the output if the table contains 100 records.

• The column 'columnname' does not exist in the employee table, so the query will result in an error.

• The value '1' will be selected for each record in the employee table, resulting in 100 rows with the value '1'.

• The output will be a single column with 100 rows, all containing the value '1'.

No, DML operations cannot be performed on UDF functions.

• UDF functions are read-only and cannot modify the data in the database.

• DML operations can only be performed on tables or views.

• UDF functions can be used in SELECT statements to retrieve data.

• Examples of UDF functions include string manipulation, date calculations, and mathematical operations.

SQL query to select all columns from two tables.

• Use SELECT statement to select columns from tables.

• Use aliases to differentiate columns from different tables.

• Separate table names with comma in FROM clause.

Partial view returns HTML string while render partial view writes directly to response stream.

• Partial view returns HTML string that can be used in the main view

• Render partial view writes directly to response stream

• Partial view can be used to render reusable components

• Render partial view can be used to render a partial view without a layout

Virtual keyword is used for method overriding while new keyword is used for hiding base class member.

• Virtual keyword is used to allow a derived class to override a method in the base class.

• New keyword is used to hide a base class member in the derived class.

• Virtual keyword is used with the base class method while new keyword is used with the derived class method.

• Virtual keyword is used for runtime polymorphism while new keyword is used for compile-time polymorphism.