i have 4 year gap after my graduation in mechanical engineering what should i do for job
It's upto you like what you want to do. I mean you took 4 years gap after graduation then it would have been for some reason right?
Anyways coming back to the topic, you can apply for jobs and then you've to be super brilliant in order to impress them in the GD AND PI rounds. You've to impress them in such a way that your gap gets overshadowed. Or else if you want to go for further postgraduation, then you can go for MSC, MTECH, MIS or MBA too. Find the corresponding entrance exams, start preparing for them, crack them, and you are there.
Best wishes. Thank you.
If you have 4 year gap after your graduation and now you want go for job either in private company or PSU's so this gap matters a lot they will definitely ask you to justify your gap period then you will have to make a justification letter where you will mentioned that what you did in this gap period and what was the reason for this gap and rest process is same as a fresher get job, but you will have to submit this letter too.
Best of luck.