11-63.
11-64.
11-65.
11-66.
11-67.
The buffer memory in the disk memory set’s
computer is used for which of the following
functions?
1.
2.
3.
4.
To prevent data from being read from the
disk during a write operation
To prevent data from being written on the
disk during a read operation
To prevent the loss of data during a reading
or writing operation
To hold the external function from the
computer
A disk memory set is capable of reading and
writing data on the same disk at the same time.
1. True
2. False
A single disk memory set controller is capable
of controlling a total of how many drives?
1. One
2. Two
3. Three
4. Four
In a disk memory set’s controller to disk drive
interface, each drive is connected to the
controller by which of the following means?
1.
2.
3.
4.
A daisy chained A cable only
A daisy chained B cable only
Both a daisy chained A and a daisy chained
B cable
A daisy chained A cable and a unique B
cable
The A cable in a disk memory set’s controller-to-
drive interface is used for which of the following
functions?
1 .
2 .
3.
4 .
Interrupt signal processing only
Send timing signals for read/write
operations only
Microprocessor control of the drives
Data interface between the drive and
controller
80
11-68.
11-69.
11-70.
11-71.
11-72.
In a disk memory set, converting 16-bit parallel
data into a serial NRZ pulse train is a function of
which of the following areas?
1. Controller microprocessor
2. Controller buffer memory
3. Data bus control unit
4. Disk control logic
In a disk memory set, the data bus control unit
gives the highest priority to which of the
following transfer requests?
1. Disk control logic and buffer memory
2. Processor input and output holding register
3. Input/output channel
4. Computer generated input data
In a disk memory set, data is written on the disk
using which of the following encoding methods?
1.
2.
3.
4.
Phase encoding
Non-return-to-zero
Non-return-to-zero-indiscrete
Modified frequency modulation
What is the minimum speed required for the
heads of a disk memory set to load?
1. 3,000 rpm
2. 3,100 rpm
3. 3,200 rpm
4. 3,600 rpm
In a disk memory set, if the disk drive motor’s
speed drops below 3,100, which of the following
events will occur?
1.
2.
3.
4.
The heads will crash into the disk
The heads will automatically unload or
retract
The disk memory set will automatically turn
off power
The disk memory set will continue to operate
normally
