Can you suggest me some job-oriented courses other than M.Sc. and MBA which can be done after B.Sc?

You first need to decide on your interest areas and long-term career objective then keeping both in mind decide to pursue further courses. There are a lot of certificate & Diploma courses in multiple areas that can enhance your chances of getting a job. Some of the areas are- data analytics, graphic

After B.Sc, the job oriented course is MCA. It is not that core computer job, but is related to computer and network, or if you want to go for government teaching jobs, go for B.Ed regular, try to do M.Sc Later. You can check for the options on some universities for your help - Lovely Professional U

You can do both courses. But it could better if you do M.Sc. As you are from Science field. In other ways, if you interested in business and marketing field and want to work with any company then go for MBA. Thanks.