About Question enthuware.ocajp.i.v7.2.984 :

[kwetal]

There are typos in at least 2 of the answers, making them invalid an ineligible:

If input is "0x.1" then it will return Float.Nan and print Invalid Input 0x.1 and finally.

(answer 2) should be

If input is "0x.1" then it will return Float.NaN and print Invalid input 0x.1 and finally.

and

If input is "0x1" then it will return 0.0 and print Invalid Input 0x1 and finally.

(answer 4) should be:

If input is "0x1" then it will return 0.0 and print Invalid input 0x1 and finally.

[admin]

Fixed.
thank you for your feedback!