Get exam result from moodle in MVC Application

I am new to moodle. My requirement is , I want get the exam result of students from moodle using my MVC application.

How can I access the exam organized in moodle ?

How can I integrate the students & faculties in moodle with my mssql db ?

How can I integrate the exam name created in DB with the exam created in moodle.?

How I get the results from moodle using any API ?

It will be a great help for me, if any one can given an instruction.