The buffer memory in the disk memory sets
computer is used for which of the following
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
A disk memory set is capable of reading and
writing data on the same disk at the same time.
A single disk memory set controller is capable
of controlling a total of how many drives?
In a disk memory sets controller to disk drive
interface, each drive is connected to the
controller by which of the following means?
A daisy chained A cable only
A daisy chained B cable only
Both a daisy chained A and a daisy chained
A daisy chained A cable and a unique B
The A cable in a disk memory sets controller-to-
drive interface is used for which of the following
Interrupt signal processing only
Send timing signals for read/write
Microprocessor control of the drives
Data interface between the drive and
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?
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 motors
speed drops below 3,100, which of the following
events will occur?
The heads will crash into the disk
The heads will automatically unload or
The disk memory set will automatically turn
The disk memory set will continue to operate