Exam 10: Computer Arithmetic

One drawback of sign-magnitude representation is that there are two representations of 0.

Positive numbers less than 2-127 are called ________.

The numbers represented in floating-point notation are not spaced evenly along the number line,as are fixed-point numbers.

__________ is when the result is put back into the floating-point format and the extra bits must be eliminated in such a way as to produce a result that is close to the exact result.

With a fixed-point notation it is possible to represent a range of positive and negative integers centered on or near 0.

__________ format is a fully specified,fixed-length binary encoding that allows data interchange between different platforms and that can be used for storage.

__________ is when a positive exponent exceeds the maximum possible exponent value.

"To subtract one number from another,take the twos complement of the subtrahend and add it to the minuend" is the _________ rule.

The use of subnormal numbers is referred to as _________ underflow.

It is not necessary for the ALU to signal when overflow occurs.

__________ means that the number is too small to be represented and it may be reported as 0.

Both sign-magnitude representation and twos complement representation use the most significant bit as a sign bit.

The _________ is that part of the computer that actually performs arithmetic and logical operations on data.

Compared with addition and subtraction,multiplication is a complex operation,whether performed in hardware of software.

_________ formats extend a supported basic format by providing additional bits in the exponent and in the significand.

The most important floating-point representation is defined in IEEE Standard _________,adopted in 1985 and revised in 2008.

When the divisor is able to divide the number,a 1 is placed in the quotient and the divisor is subtracted from the partial dividend; the result is referred to as a ________.

Overflow can only occur if there is a carry.

Overflow is a less serious problem because the result can generally be satisfactorily approximated by 0.

_________ format covers five floating-point representations,three binary and two decimal,whose encodings are specified by the standard,and which can be used for arithmetic.