CS609-Midterm
1 / 50
If CPUID instruction is not present then the processor can be a
2 / 50
Which of the following are types of ISR __________.
3 / 50
Only ________ ports are important from programming point of view.
4 / 50
DCE is _____________
5 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
6 / 50
Tail of keyboard should get to get the start of buffer.
7 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
8 / 50
Timer interrupt is a _________.
9 / 50
DSR stands for __________ .
10 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
11 / 50
__________is used to control the printer via the BIOS
12 / 50
Int ________ is used to control the printer via the BIOS.
13 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
14 / 50
Hardware Interrupts are __________.
15 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
16 / 50
BIOS support _____________UARTS as COM ports.
17 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
18 / 50
Standard PC operates in two modes in terms of memory which are
19 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
20 / 50
Timer interrupt occurs _______ times every second by means of hardware.
21 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
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PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
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UART stands for_______
24 / 50
File can be______ viewed as collection of clusters or blocks.
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The keyboard input character scan code is received at ___ port.
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File system used in CD’s is_______ file system
27 / 50
28 / 50
NMI Stand for
29 / 50
___________ is used to identify cause of interrupt.
30 / 50
The interval timer can operate in ____modes.
31 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
32 / 50
Int 14H____________ can be used to send a byte
33 / 50
The Function of I/O controller is to provide ____________.
34 / 50
Following is not a method of I/O
35 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
36 / 50
------------ is used to read date from RTC
37 / 50
Keyboard uses port ____ as status port.
38 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
39 / 50
DTE is ____________.
40 / 50
41 / 50
To distinguish 486 with Pentium CPUID Test is used.
42 / 50
Software based flow control make use of -------- control characters
43 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
44 / 50
There are two type of communication synchronous and Anti Synchronous
45 / 50
Maximum number of interrupts in a standard PC is
46 / 50
Which port is known as Data Port______
47 / 50
_______ is LED control byte.
48 / 50
49 / 50
------------ is used to read time from RTC
50 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
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