7-51. The I/O control circuits are controlled by which of 7-56. I/O control memory words are set aside in main the following means? 1.  The  CPU 2. The  IOC 3. The I/O master clock 4.  The  computer  program 7-52. A sequential set of memory locations that contains data to be sent out or an area that is set aside for data to be received is known by which of the following items? 1. An input register 2. An output register 3. Both 1 and 2 above 4.  A  buffer 7-53. Which of the following operations is/are unbuffered? 1. 2. 3. 4. Data is transferred between the computer and the external devices Data is exchanged between the CPU and the various parts of the computer Both 1 and 2 above Data is exchanged between external devices offline 7-54. The I/O processor’s sequencing circuits control which of the following actions? 1. The order in which events will be executed based upon the translated function code 2. The order in which memory addresses of data to be retrieved or stored will be acted on 3. The order in which external equipment output requests will be acknowledged 4. The order in which external interrupts will be acted on by the computer 7-55. The CPU interfaces with the I/O processor through which of the following means? 1.  Special  interface  circuits 2. The CPU’s I/O instructions 3.  The  sequencing  circuitry 4.  The  maintenance  console memory to control which of the following actions? 1. Data transfers for I/O buffer functions 2. The sequence of I/O operations 3. Parallel operations 4. Serial operations 7-57. In parallel operations, each I/O channel has its own block of memory addresses for which of the following operations? 1.  Input  and  output  only 2.  External  function  only 3.  External  interrupt  operations  only 4. Input, output, external function, and external interrupt   operations 7-58. Serial operations are affected by which of the following factors? 1. 2. 3. 4. Character size, parity selection, and asynchronous interfacing only Parity selection, baud rate, and synchronous interfacing only Character size, parity selection, and synchronous and asynchronous interfacing only Character size, parity selection, baud rate, and synchronous and asynchronous interfacing 7-59. Monitor words are used for which of the following purposes? 1. To monitor external equipment status 2. To monitor bytes that are to be transferred by the  pending  operation 3. To store characters for comparison with received  data  characters 4. To monitor main memory for the next available  address  for  chaining  instructions 7-60. Another term for accumulator based I/O is which of the following? 1 Direct CPU interface 2.  Direct  memory  access 3. Interrupt driven I/O 4.  Memory  mapped  I/O 48