The first job that most of us will take will be that of SHO or HO (house officer). A typical appointment will be for 6 months however, more and more branches are encouraging longer appointments (2 year rotations are fairly common). Often and HO job is the one you may take up. Such a decision becomes simpler if you have never worked before at all (fresh intern), however sometimes we know those with MD and 3-4 years experience have chosen to take up an HO job. Possibly out of anxiety after being unemployed for a couple of months. HO post is comparable to the internship in some countries except that the HO is paid well and expected to work hard, not just carry investigation tubes from here to there!
During your HO and SHO jobs, you are best advised to give your exams and finish your part I and II of your memberships. That will gear you for the next step in your career, the registrar's post.
Registrar's post is not your right, and does not come to you if you don't try actively for it. However, if you do the right things, pass the exams, publish and generally get good references, you have a 40-60% chance of being a registrar atleast in branches such as anaesthesiology, radiology, psychiatry, medicine, OG etc. Surgical registrar jobs are the toughest to get, perhaps orthopaedic registrars are more easy posts to get than general surgical.
Registrar's posts are of two types, I and II. Most such jobs come under the "structured training" programme instituted by the various deaneries since 1995 (Calman's structured training). Only those with "right of indefinite stay" will be awarded the type I training positions. CCST (certificate of completion of specialist training) is acquired at the end of the stipulated training period, which is generally 4-5 years. After that, you can apply for a consultants job. If you have worked in other European countries or in USA, part of that registrars training is approved and you may be given that consideration.