5-47. The number of printers and serial ports is
determined.
5-48. The ALU obtains the data required to perform
arithmetic and logical calculations from which of
the following places?
1. Timing circuits
2. Operands only
3. Designated CPU registers only
4. Operands and designated CPU registers
5-49. To perform computations, which of the following
methods is/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
5-50. 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
5-51. 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
5-52. Double-length memory word operands will be
used for mathematical operations when the size
of the result would be (a)
than the
(less; greater)
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.
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
32
