7-56. I/O control memory words are set aside in main 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. Character size, parity selection, and asynchronous interfacing only 2. Parity selection, baud rate, and synchronous interfacing only 3. Character size, parity selection, and synchronous and asynchronous interfacing only 4. 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 7-61. The CPU handles all I/O transactions by executing one or more instructions for each word of information transferred. This process is known by which of the following terms? 1.  Polled  I/O 2.   Memory   mapped   I/O 3.   Interrupt   driven   I/O 4.   Accumulator   based   I/O 7-62. In memory mapped I/O, the CPU accesses the I/O device by which of the following means? 1.  Tieing  peripheral  devices  directly  into the   communication   bus 2.   Placing   appropriate   addressing information  on  the  bus 3.  Checking  each  channel  or  port  to determine if it has data for input or is ready  to  accept  output  data 4.   Using   an   I/O   processor   for   interface between memory and the external equipments 7-63. During direct CPU interface operations, the CPU continuously tests the status register. This technique is known by which of the following terms? 1.   Memory   mapped   I/O 2.   Accumulator   based   I/O 3.   Interrupt   driven   I/O 4.  Polled  I/O 59