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