WASHINGTON — Facebook CEO Mark Zuckerberg got into an awkward exchange with a top Democratic senator on Tuesday when the lawmaker began asking him personal questions.

During the blockbuster hearing on Capitol Hill, Sen. Dick Durbin asked Zuckerberg, "Would you be comfortable sharing with us the name of the hotel you stayed in last night?"

"Um," Zuckerberg said before a long pause. "No."

The audience and panel of senators erupted in laughter at Zuckerberg's hesitancy to answer the question, but Durbin used it to make a point about personal privacy, which was the focus of the joint hearing between the Senate's Judiciary and Commerce committees.