Yes definitely you can pursue both together in fact from 3rd semester you'll be studying company law in llb also and in 4rtn sem you can opt for intellectual property rights and corporate related subjects in further sem ..llb + cs  ..is great combination to enter into corporate

No, you can not pursue both these courses simultaneously in DU. You can, however, do LLB from DU and B.Sc. in Computer Sciences from open. DU only allows admission in one undergraduate course to a student per year. And, it is not beneficial to pursue 2 courses together as your syllabus will be tough and you may not be able to good in any of them. It is better to decide on the course that you want to do, that is interesting to you and where you can score well.