DOS का पूर्ण रूप है – McqOptions

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1.	DOS का पूर्ण रूप है
A.	डायरेक्ट ऑपरेटिंग सिस्टम
B.	ड्यूल ऑपरेटिंग सिस्टम
C.	डिस्क ऑपरेटिंग सिस्टम
D.	डायल ऑपरेटिंग सिस्टम
Answer» D. डायल ऑपरेटिंग सिस्टम

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