In $64-$bit IEEE Floating Point $$

$,$ the largest exponent allowed is Blank $1$ Question $2$

$1023$

$.$ This means that

$=1$

$,$ the smallest exponent used for standard floating point numbers is Blank $2$ Question $2$

$-1022$

$.$ This choice means that the two bit patterns Blank $3$ Question $2$

$00000000000$

and Blank $4$ Question $2$

$11111111111$

are not used for standard floating point numbers. The smaller of these, Blank $5$ Question $2$

$00000000000$

$,$ is used so that we can represent $0$ and a range of very small subnormal numbers. The larger of them, Blank $6$ Question $2$

$11111111111$

$,$ is used so that we can represent infinities, overflow, underflow and NaN's.