CS609-Midterm
1 / 50
Interrupt 9 usually reads the _________ from keyboard.
2 / 50
__________is used to control the printer via the BIOS
3 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
4 / 50
Only ________ ports are important from programming point of view.
5 / 50
By cascading two DMAs ____ bits can be transferred.
6 / 50
______ is used to set time.
7 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
8 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
9 / 50
______ is LED control byte.
10 / 50
A single interrupt controller can arbitrate among ____ different devices.
11 / 50
Software based flow control make use of -------- control characters
12 / 50
DTE is ___________
13 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
14 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
15 / 50
Keyboard uses port ____ as status port.
16 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
17 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
18 / 50
DTE is ____________.
19 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
20 / 50
21 / 50
______ is Disk interrupt.
22 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
23 / 50
File system used in CD’s is_______ file system
24 / 50
In keyboard status byte bit no. 2 and 3 are used for ctrl and alt keys respectively. which of the following condition is used to check that Ctrl + Alt keys are pressed. Where: unsigned char far * scr = (unsigned char far *)(0x00400017);
25 / 50
The keyboard makes use of interrupt number _______ for its input operations.
26 / 50
To distinguish 486 with Pentium CPUID Test is used.
27 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
28 / 50
29 / 50
30 / 50
If CPUID instruction is not present then the processor can be a
31 / 50
------------ is used to set time from RTC
32 / 50
DSR stands for __________ .
33 / 50
Standard PC operates in two modes in terms of memory which are
34 / 50
There are two main types of interrupts, namely
35 / 50
There are __________ kinds of serial communication.
36 / 50
In ____________each byte is needed to be encapsulated in start and end.
37 / 50
Interrupt ______ is used to get or set the time.
38 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
39 / 50
Operating system name contains ____ bytes in boot block.
40 / 50
Each paragraph in keep function is ____ bytes in size.
41 / 50
UART stands for_______
42 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
43 / 50
Tail of keyboard should get to get the start of buffer.
44 / 50
PPI stands for _____________.
45 / 50
46 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
47 / 50
_____ bit is cleared to indicate the low nibble is being sent.
48 / 50
DCE stands for __________.
49 / 50
File can be______ viewed as collection of clusters or blocks.
50 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
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