1. The method of bus arbitration that does not contain priority resolving network in it is
a) daisy chaining
b) independent request
c) polling
d) none
Explanation: The daisy chaining method does not contain any priority resolving network, rather the priorities of all the devices are essentially assumed to be in sequence.
2. Which of the following is the fastest method of bus arbitration?
a) daisy chaining
b) independent request
c) polling
d) none of the mentioned
Explanation: The independent request scheme is quite fast because each of the masters can independently communicate with the controller
3. A set of address lines is driven by the controller in
a) daisy chaining
b) independent request
c) polling
d) none of the mentioned
Explanation: In a polling scheme, a set of address lines is driven by the controller to address each of the masters in sequence
4. The files that reside in the current drive and directory of the hard disk is
a) OBJ files
b) EXE files
c) SRC files
d) DEST files
Explanation: The files that reside in the current drive and directory of the hard disk is EXE files
5. The master processor stores the result buffers on to the hard disk with the filename as
a) .EXE file
b) .OBJ file
c) .EXE file with extension .RES
d) .OBJ file with extension .RES
Explanation: The master processor stores the result buffers on to the hard disk with the filename as .EXE file with extension .RES.
6. The 8288 bus controller chip derives the signals
a) ALE
b) DEN
c) DT/R(active low)
d) All of the mentioned
Explanation: The latches are enabled by ALE signal and data will be enabled by DEN signal. The ALE, DEN and DT/R(active low) signals are derived by a separate 8288 bus controller chip.
7.The EXE files should not exceed the size of
a) 30 KB
b) 50 KB
c) 60 KB
d) 40 KB
Explanation: The EXE files should not be more than 60 KB size
8. A part of memory that can be addressed by more than one processor for communication is known as
a) memory module
b) bus window
c) ram
d) memory management unit
Explanation: There are two slave processors and thus there are two bus windows.
9. When a subprocessor wants to communicate with the bus window, it informs the main processor to
a) enable control buffer
b) storage buffer
c) disable tristate buffer
d) translation look aside buffer
Explanation: An 8255 IO card is used to control the tristate buffers that provide isolation. When a subprocessor wants to communicate with the bus window, it informs the main processor to disable tristate buffer.
10. When the subprocessor completes its execution, then the status on the status lines shows
a) hold status
b) halt status
c) high status
d) low status
Explanation: When the subprocessor completes its execution, then the status on the status lines shows halt status.