Hello,
First of all if you want to pursue post graduate degree in computer science and journalism you can do so both the courses simultaneously, however the only condition is one is to be done through regular mode and another through distance mode, you cannot pursue two degree courses at the same time in regular medium, the institutes may be same or different, that doesn't matter, however one is to be done through regular and another through distance,
now coming to your question the scope after completion of MSc Computer Science lies in both technical and non-technical domain such as IT firms, academics, business organizations, design companies, you will get job profiles that of software developer, network technician, computer hardware engineer etc in top companies such as TCS, IBM, Accenture, Cognizant, Siemens, explore full details pertaining to MSc Computer Science at https://www.careers360.com/courses/msc-in-computer-science
when it comes to journalism, there is no such restrictions of being graduate from a specific discipline unlike say for MSc Computer Science, this field too is emerging at incredible rate, hence the opportunities are diverse, the job profiles includes that of reporter/critic/photojournalist/proof-reader/correspondent/feature writer/editor etc , some of the top recruiters are TOI, Hindustan Times, Zee Network, AIR, Indian Express, The Hindu, India Today Group to name a few, visit our page at https://www.careers360.com/courses/journalism-course to know more details regarding this,
to answer your question, both the fields are emerging at great pace, and holds great significance ahead in future, it depends you want to explore which domain, if you have great technical expertise then go for computer science if you want to explore unconventional dimension more so making the world and its citizens well-informed about so much happenings, then go for journalism.
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