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   Q A computer uses a floating point representation comprising a signed magnitude fractional mantissa and an excess-16 base 8 exponent. What decimal number is represented by floating point number whose exponent is 1001 and mantissa 101000 and the sign bit set???? 

a) -6250 
b)-20480 
c)-320 
d)-0.00122 

Q Floating point numbers ina computer are represented by a 10bit mantissa(including sign bit and a 6 bit exponent) The approx value of the maximum number that can be represented is (assuming mantissa is stored in normalised form) 

a)2^64 
b)2^63 
c)2^32 
d)2^31


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