First, head office short list the resume and send to store manager. Store manager select some of resume. Then, he call those persons for interview. when face to face interview done. They want some reference. After, they call to those persons. when they satisfy from the references, again they call for interview which includes some paperwork, reasoning, English test, numerical test. which candidate should complete in specific time. Also, manager complete interview round through paper. If you pass that test. You Hired by company.
Looking for better opportunity and position. BP is also respectable company. As a fresher, doing job over BP is very good and getting better experience.