CS609-Midterm
1 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
2 / 50
Tail of keyboard should get to get the start of buffer.
3 / 50
Timer interrupt occurs _______ times every second by means of hardware.
4 / 50
Maximum number of interrupts in a standard PC is
5 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
6 / 50
Standard PC operates in two modes in terms of memory which are
7 / 50
Each paragraph in keep function is ____ bytes in size.
8 / 50
On the execution of IRET instruction, number of bytes popped from stack is
9 / 50
PPI stands for
10 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
11 / 50
The BIOS interrupt ________ can be used to configure RTC.
12 / 50
________means typematic rate will be sent in next byte.
13 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
14 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
15 / 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);
16 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
17 / 50
18 / 50
The ____________ function simply enables the self test facility within the modem control register
19 / 50
In self test mode the output of the UART is routed to its input.
20 / 50
_________ is used to identify the cause of interrupt.
21 / 50
Software based flow control make use of -------- control characters
22 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
23 / 50
Which of the following are types of ISR __________.
24 / 50
DMA stands for_________
25 / 50
------------ is used to read time from RTC
26 / 50
Only ________ ports are important from programming point of view.
27 / 50
__________is used to control the printer via the BIOS
28 / 50
File system used in CD’s is_______ file system
29 / 50
_____ bit is cleared to indicate the low nibble is being sent.
30 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
31 / 50
LPTs can be swapped.
32 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
33 / 50
DTE is ___________
34 / 50
Interrupt 9 usually reads the _________ from keyboard.
35 / 50
Communication between keyboard and keyboard controller is __________.
36 / 50
Int 14H____________ can be used to send a byte
37 / 50
DCE stands for __________.
38 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
39 / 50
40 / 50
The service _________ is called the keyboard hook service.
41 / 50
There are two main types of interrupts, namely
42 / 50
43 / 50
Interrupt _____ is empty; we can use its vector as a flag.
44 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
45 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
46 / 50
By cascading two DMAs ____ bits can be transferred.
47 / 50
DSR stands for __________ .
48 / 50
49 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
50 / 50
______ is Disk interrupt.
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