How SQL Server indexing works

Question

SQL Server uses binary tree with intermediate and leaf node for search but how it will do this. Ex. If a table employee has two fields

Id bigint 
Name varchar(5         


        

Answer 1

This question is a conceptual one and requires a very straight forward answer You can read this article for a short answer :

How Does an SQL Index work

Answer 2

How It Works

The database takes the columns specified in a CREATE INDEX command and sorts the values into a special data structure known as a B-tree. A B-tree structure supports fast searches with a minimum amount of disk reads, allowing the database engine to quickly find the starting and stopping points for the query we are using.

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For more info, check THIS!