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Exam 10: Computer Arithmetic

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Question 21

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

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Arithmetic...

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Question 22

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

A) Arithmetic
B) Basic
C) Extended precision
D) Interchange

E) A) and C)
F) All of the above

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Question 23

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

__________ 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.

_________ 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.

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

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

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.

Positive numbers less than 2-127 are called ________.

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

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

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

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

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

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

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

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.

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