What is x'ffff' in decimal?

Answer: Option C

This question asks you to convert a hexadecimal number (x'ffff') to its decimal equivalent. Let's break it down:
* Hexadecimal Numbers: Hexadecimal uses 16 digits: 0-9 and A-F. Each digit represents a power of 16. * x'ffff': This represents the hexadecimal number FFFF.
To convert this to decimal, we'll multiply each digit by its corresponding power of 16 and then add the results:
* F (15 in decimal) * 16^3 = 65536 * F (15 in decimal) * 16^2 = 3840 * F (15 in decimal) * 16^1 = 240 * F (15 in decimal) * 16^0 = 15
Adding these together: 65536 + 3840 + 240 + 15 = 69631
Therefore, the decimal equivalent of x'ffff' is not listed in the options. None of the given options is correct.