Nvidia employees say CEO Jensen Huang is 'not easy to work for.' He says that's how it should be.

• Nvidia CEO Jensen Huang has no qualms about being a demanding leader.
• Huang told "60 Minutes" that accomplishing "extraordinary things" required hard work.
• The CEO is known for juggling 50 direct reports while running the $2 trillion company. 

Nvidia CEO Jensen Huang has a reputation for being a formidable boss — and that's the way he likes it.

In a recent interview on "60 Minutes," Huang was unsurprised when the correspondent Bill Whitaker shared some of the words Nvidia employees had used to describe the company's chief.