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1. Which of the following is an operating system?

  • A. unix
  • B. unix
  • C. unix
  • D. unix

Answer: Option A

Explanation:

Unix একটি মাল্টি টাস্কিং operating system । Oracle একটি Database program । Ms Access power point ও Excel মাইক্রোসফ্ট প্রবির্তত Office Management Package Program - এর content ।

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