Is using Oracle HRMS/HCM or SAP necessary to run business properly? so as candidates get well prepared for future vacancies?

Yes, it is recommended for your better future with the multinational companies.

Companies are likely to have a fully integrated, secured, good reputation in very complex business environment, and the first2 ERP solutions that comes to your head when you think about these requirements are Oracle and SAP.

however I don't recommend to start a deep study as each company uses a different setup to match the business requirement and you don't need to spend much time in studying a particular ERP and find yourself hired in a company uses another one. Also, you will not cover all the market's ERP solutions.

I do recommend to start leaning by watching videos on Youtube, you will find it very sufficient to get the knowledge and to be ready for the real experience in one of the companies that uses oracle, SAP or any other integrated ERP solution.

IT'S necessary to get organization uptodate

Yes due to the IT these softwares/programmes are necessary to get organization uptodate/align with the current business survival and to learn these technology for a job seekers are required to get theirself qualified before the job searching as well.

yes i recommend candidates to study sap or oracle.