Salesforce TSE Interview Questions and Answers

Difference between IEnumerable and IQueryable

• IEnumerable is used for in-memory collections while IQueryable is used for querying data from a database

• IEnumerable executes the query on the client-side while IQueryable executes the query on the server-side

• IQueryable supports deferred execution while IEnumerable does not

Htmlfor generates a label and input element with a specified name, while html does not.

• Htmlfor is used to generate a label and input element with a specified name

• Html is used to generate HTML markup

• Htmlfor is used for strongly-typed views

• Htmlfor is more secure as it binds the input to a model property

• Htmlfor is used for creating form elements

• Html is used for creating HTML elements

Abstract classes are partially implemented classes that can have both abstract and non-abstract members. Interfaces are fully abstract classes that define a contract for implementing classes.

• Abstract classes can have constructors, fields, and non-abstract methods, while interfaces cannot.

• A class can inherit from only one abstract class, but it can implement multiple interfaces.

• Abstract classes can provide default imple...read more

Query to find 4th highest salary

• Use the 'ROW_NUMBER' function to assign a rank to each salary

• Order the salaries in descending order

• Select the salary with rank 4

MVC is a web application framework for building web pages, while WebAPI is a framework for building HTTP services.

• MVC is used for building web applications that return HTML views to the client.

• WebAPI is used for building HTTP services that return data in JSON or XML format.

• MVC has a view engine that generates HTML output, while WebAPI does not.

• MVC has a controller that handles user input and updates the model, while We...read more