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In Computer Science B.Sc CS.
Bachelor of Computer Application BCA
Bachelor of Technology in Computer Science (B.Tech CS)
If you compare this three on their volume of Course-
BCA B.Sc CS B.Tech CS or BCA B.Tech CS B.Sc CS depending on the college or university. To pursue BCA, you can join from Science, Commerce and Arts background. But, to pursue B.Tech or B.Sc CS, you'll need a solid background of mathematics. The main difference between B.Sc CS and BCA is BCS CS is concept oriented. It will teach you the Core Concept of computer Science, which will help you to learn anything new very quickly, other hand BCA is application oriented, teach current technologies, but learning new technologies or working on Core Computing is difficult. There is a misconception that B.Sc doesn't teach programming language, when I was doing B.Sc. I learned C, C+, Java and PHP and SQL. Also I got a Good Practical knowledge about Electronics and Microprocessor. In B.Sc. I learned about Microprocessors, Automata and Compilers, Data Structure, Analog and Digital Electronics, Networking, Discrete Mathematics, Graph Theory. In BCA they teach the same topics, but a not in a detailed way. B.Sc. CS is a General Course and BCA is a Technical Course, so getting job from BCA is easy than B.Sc. CS. After B.Sc. CS you can do M.Sc. CS or MCA both. But after BCA you can only do MCA. M.Sc. CS You'll get more knowledge in Core Computer Science like Parallel Computing, Artificial Intelligence, Soft Computing, and Information Security. Best of Luck.

Electrical and electronic engineering may sound similar, but they are very different. Both involve moving electricity around a circuit to power useful products and machines, but that is where the similarity ends!
The main difference between electrical and electronic circuits is that electrical circuits have no decision making (processing) capability, whilst electronic circuits do. An electric circuit simply powers machines with electricity. However, an electronic circuit can interpret a signal or an instruction, and perform a task to suit the circumstance. To put it simply. Electrical is something that deals with High voltage like, Transmission Lines
Heavy electric Motors
Power generation etc. Electronics is something which works in electrical domain on Lower voltage and current. Like, Home appliance (TV, Refrigerator, Air Conditioner, PlayStation)
Microprocessor, Microcontroler.