5-49.
5-50.
5-51.
5-52.
To perform computations, which of the
following methods are used in addition and
subtraction operations?
1. Radix minus one only
2. Radix minus two only
3. Conversion only
4. Radix minus one, radix minus two,
and conversion
The destination of the results of ALU
operations may include which of the
following places?
1. Timing circuits
2. Registers only
3. Operands only
4. Registers and operands
Computers can be designed to use which of
the following word-length operands to
carry out arithmetic operations?
1. Whole-word, half-word, and
quarter-word operands only
2. Single-length word operands only
3. Double-length word operands only
4. Whole-word, half-word, quarter-word,
single-length word, and double-length
word operands
Double-length memory word operands will
be used for mathematical operations when
the size of the result would be (a)
(less; greater)
than the length of either of the registers
used to provide inputs to the ALU or the
operands being input to the ALU are
(b)
than a single word.
(larger; smaller)
1. (a) Less
(b) larger
2. (a) Less
(b) smaller
3. (a) Greater (b) larger
4. (a) Greater (b) smaller
IN ANSWERING QUESTIONS 5-53 THROUGH
5-56, SELECT FROM THE FOLLOWING LIST
THE ITEM USED BY THE ALU IN
ARITHMETIC OR LOGICAL CALCULATIONS
DESCRIBED IN EACH QUESTION.
5-53.
5-54.
5-55.
5-56.
5-57.
5-58.
5-59.
1. Flags
2. Selectors
3. Counters
Used to keep track of shifts.
A carry or borrow condition is indicated.
Used to transfer data between various
registers in the ALU.
Used to indicate the status of the last
logical calculation.
What method is used to represent a integer
number?
1. R’s minus 1
2. R’s minus 2
3. Fixed-point
4. Floating-point
For whole numbers, what is the maximum
absolute decimal value that can be
contained in a 6-bit register?
1.
31
2.
32
3.
63
4.
64
A zero in what (a) position indicates a
positive number and a one in what (b)
position indicates a negative number?
1. (a) msb (b) 1sb
2. (a) msb (b) msb
3. (a) lsb (b) lsb
4. (a) lsb (b) msb
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