Facebook CEO Mark Zuckerberg departs after testifying Wednesday before a House Energy and Commerce hearing on Capitol Hill in Washington. Zuckerberg was questioned about the use of Facebook data to target American voters in the 2016 election and data privacy.

WASHINGTON — Facebook CEO Mark Zuckerberg acknowledged Wednesday that regulation of social media is “inevitable” and disclosed that his own personal information has been compromised by malicious outsiders. But after two days of congressional testimony, what seemed clear was how little Congress seems to know about Facebook, much less what to do about it.

Statements from representatives facing re-election this year ranged from complaints of anti-conservative bias to questions about whether Facebook could improve broadband speeds in their state.

Facebook shares rose more than 1 percent after climbing 4.5 percent on Monday. Rather than putting a dent in his well-prepared armor, two days of unfocused questioning helped Zuckerberg restore more than $25 billion in value the company has lost since the Cambridge Analytica scandal broke in mid-March.

Facebook’s stock remains 10 percent below where it stood before the scandal, a decline that has wiped out about $50 billion in shareholder wealth.

Wrapping up his four-minutes of questioning, Rep. Gus Bilirakis of Florida commended the platform, saying “it’s wonderful for us seniors to connect with our relatives.”

Other lawmakers were similarly stymied by the rapid-fire format, unable to probe beyond surface-level accusations that Facebook had breached users’ trust.

Anna Eshoo, a California congresswoman whose district is adjacent to Facebook’s Menlo Park headquarters, pressed Zuckerberg on whether the company would be willing to change its business model to protect individual privacy. Zuckerberg said he wasn’t sure what that meant, and Eshoo was forced to say she would follow up with written questions.

Zuckerberg’s remarks came amid a second day of a congressional inquisition in the wake of the worst privacy debacle in his company’s history

Lawmakers in both parties have floated possible regulation of Facebook and other tech companies amid privacy scandals and Russian intervention on the platform.

“The Internet is growing in importance around the world in people’s lives and I think that it is inevitable that there will need to be some regulation,” Zuckerberg said.