9-37. Which addressing mode requires the operand address to be generated when the instruction is being prepared for execution? 1.   Indexed   operand 2.  Immediate 3.   Indirect 4.  Direct 9-38. In relative addressing, what two items must be added together to obtain the correct instruction or operand address? 1.  Base  address  and  offset 2.  Base  address  and  memory  register 3.  Offset  and  index  register 4.  Memory  word  and  memory  register 9-39. Instruction sizes vary among types and generations  of  computers.  They  include which of the following sizes? 1.  Character  and  full-word  only 2.  Full-word  and  half-word  only 3.  Full-word  and  double-length  word o n ly 4.   Character,   half-word,   full-word, double-length word, and multiple word 9-40. Microcomputers commonly use instructions of what word lengths? 1.   Multiple 2.   Double 3 .    F u ll 4. Half 9-41. Man-machine interfaces have at least data entry and data display capabilities. 9-42. The data entry function of a man-machine interface is used to enter commands or set parameters for which of the following activities? 1.  Test  activities  only 2.  Computer  operations  only 3.  Status  and  computer  operations  only 4.  Computer  operations,  status,  and  test activities 9-43. When a computer is continually executing instructions one after another as directed by its logic circuits and software, it is in what operating   mode? 1 . Run 2 . Step 3 . Phase 4 . Sequence 9-44. When you want to put the computer in the stop mode, which of the following methods can  you  use? 1.  Manual  action  using  STOP pushbutton 2.  Program  control  using  a  STOP instruction 3.  Both  1  and  2  above 4.  Timing  clock  circuits 9-45. What mode of operation enables a technician to test the contents of registers and memory locations at the end of each instruction    execution? 1. Run 2. Step 3. Phase 4. Sequence 1. True 2. False 75