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Pattern unlock has 9 spots, and you need to select at least 4. So the possible number of patterns is:

9!/5! + 9!/4! + 9!/3! + 9!/2! + 9!/1! + 9!/0!

Which is just 985,824. And you could certainly search the more likely combinations first -- people almost always select adjacent spots consecutively.

Just to add to everyone's knowledge: this Street View wifi snooping was a) three years ago, b) accidental, and c) only known by the public because Google voluntarily revealed that it had been doing it (and immediately deleted all of the collected data).

Not necessarily (and actually that would be a terrible answer. The highest rent in Monopoly with a hotel is $2000, and I would hardly call that a "fortune".

The point of the question is to establish how well you gather additional information when the initial description is unsatisfactory. Anyone who's been an engineer knows you have to do this every single day.

(Not that it's a good interview question.)

How I Fired Myself 13 years ago

Minor correction: the Chaos Monkey was Netflix's innovation. It just happened to be implemented on Amazon's cloud. It would have been just as useful if they had their own colocated servers or used a different cloud computing provider.