Operating Systems

Hadoop and Android are two very different things. Programming on Android is considered for application programming whereas programming on Hadoop is considered to be system programming. Hadoop comes under category of distributed operating system so if you are interested in making distributed operating system then you are welcome to use Hadoop but I would suggest you to go from the basic of distributed OS. Application programming is much easier as it focuses on "Looks" and various functionality that you want to provide, whereas system programming is back-end on server side and it is completely hidden from the user and it is very much difficult as you have to manage servers, database, fault-torrent systems, real-time operating systems etc. And all of them are really tough and you need great skills to in both theoretical knowledge and practical programming skills. Also, youu2019re in designing of algorithms, understanding/modifying existing code plays crucial role as well. If you are interested in system programming then it is good thing but you will have to be very good in it. One small mistake and you will destroy all user data which will surely end your career.

Hello,
As per the latest survey done by a leading media company, there is almost 508+ potential job seekers for every Linux and Unix. Average number of jobs available are much more than the average number of job seeker, so you might face the tough competition if you are a normal and an average student. But still, due to various inauguration of computer and software companies the need of the Unix is rapidly increasing. You need to outsmart in this field to grab the opportunity. BE or B.Tech in IT or computer science is the most sought educational background for this. But, still you need something extra to secure yourself. It is suggested to you that you should to have master M.Tech and some specialized Diplomas and certificate in this course. Other skills like; JavaScript, Python, Software Development etc. are additional weightage.
When it comes to job prospects, the average maximum salary range for Unix is INR 6,00,000/- per year to INR 9,00,000/- per year.

IOS is one of the best platforms to work on. It depends on the audience you will be targeting.Your road to success in developing high-quality apps is a good one.
Programming is an art and you need to be perfect at it. The more you will be spending time on improving programming skills and communication skills, the higher package you will receive.
Since you do not have a computer science background, I suggest you learn that since data structures and algorithms are always required for a job and internship irrespective of the platform you are working on. Gain knowledge or upgrade your skills then you will have a bright future in iOS development and you can continue your career in the same and with experience can become a Project Manager.