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PGDM is post graduate diploma in management. The minimum educational qualification for PGDM is a pass in any degree preferably in commerce or equivalent. Candidates who have passed with science and art major can also apply for the course of PGDM.
A pty is a pseudo-terminal - it's a software implementation that appears to the attached program like a terminal, but instead of communicating directly with a real terminal, it transfers the input and output to another program.