Hello,

IGNOU is one of the largest distance learning university, if you pursue BCA course then apart from weekends classes there will be practical classes as well like in any regular BCA Course, if you're preparing for UPSC then distance education does help, as you are not pursuing course full-time and there is ample amount of time to read, so that's a benefit, but honestly speaking BCA in regular mode is any day more valuable more so because it's a professional degree, nevertheless BCA as a course also doesn't add much to UPSC, computer or anything related to this domain isn't in optional subject, in fact science and tech is also limited in UPSC syllabus, as it's more humanities oriented, so basically if you want to appear for UPSC, choosing humanities becomes comparatively easier when it comes to dealing with the exam, apart from that with your BCA degree  from a distance mode you also need to work in developing other skills that's relevant to your field in case you want to work in private sector.