IEEE-754 standard for 32-bit floating point

Question

Using the IEEE-754 standard for 32-bit floating point, what biased exponents and mantissa values as given below represent NaN? (Choose all that apply)



  0 and nonzero

 

  0 and 255

 

  0 and 0

 

  255 and 0

 

  255 and 255

 

  None of the Above

 

  255 and 1

 

Answer 1

Most good Computer Architecture books or articles describe the IEEE-754 stndarrd in detail. Here is a quote from the Wikipedia article for NaN:

"IEEE 754 NaNs are encoded with the exponent field filled with ones (like infinity values), and some non-zero number in the significand field (to make them distinct from infinity values);" [ note: bold added]