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Well, the title above is enough to recognize. Every single child is aware of it. It's none other than 'Facebook.' Facebook is an online social networking service company...see morebased in Menlo Park, California, founded by Mark Zuckerberg. It had more than 2.2 billion monthly active users as of January 2018. But, how much you know about Facebook? Take this quiz to test your social networking knowledge. see less
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