Career

B.E. is more recommended as it provides more in-depth knowledge of computer networking and the way a computer and the networking system work. This serves as the foundation for CISCO certification courses. Comparatively, BCA doesn't provide the details to such an extent. That's one of the reasons why MCA is considered equivalent to BE and not BCA.
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Yes, she will be. If you are selected in any top management college then your life will get secured but never do any dual courses like 5 years course from the same college which involves BBA and MBA both.

A lot of jobs are waiting for you. You can apply for the graduate level competition tests conducted by SSC, UPSC, etc. Graduation with 50% marks is the qualification required for civil services. Being a graduate, you are eligible for PO positions in banks. Also, graduates are considered for various positions under state government and these days computer diploma is useful to teach too.

You can join merchant navy but first of all you have to take admission in merchant navy courses like GP rating and B.Tech in marine engineering. After completing the course you can do job in merchant navy.

CSE from IIT has more salary prospects. Maximum millionaires/billionaires in the world are having IT background.

It varies from state to state and country to country. But, average fee will be around 25-40 lacs for the complete training.

Complete your class 12th final exam with minimum 60% score in mathematics, physics and chemistry and then enroll yourself to a good flying school.

Yes, BCA and MCA is a good course if you want your career in IT field. This course will help you in getting a good job and MCA is also equivalent to B.Tech in CSE or IT. This course can be pursued by any student from science or commerce background. Career prospects are also good in this field.