CS609-Midterm
1 / 50
Only ________ ports are important from programming point of view.
2 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
3 / 50
To distinguish 486 with Pentium CPUID Test is used.
4 / 50
Keyboard uses port ____ as status port.
5 / 50
REGS is a Union
6 / 50
At IRQ 7 Interrupt # ___ is used.
7 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
8 / 50
The service _________ is called the keyboard hook service.
9 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
10 / 50
------------ is used to read date from RTC
11 / 50
Each paragraph in keep function is ____ bytes in size.
12 / 50
------------ is used to set time from RTC
13 / 50
Register can be used to divide frequency is _________
14 / 50
______ is Disk interrupt.
15 / 50
_____ bit is cleared to indicate the low nibble is being sent.
16 / 50
Hardware Interrupts are __________.
17 / 50
DSR stands for __________ .
18 / 50
Control information in files is maintained using
19 / 50
In ____________each byte is needed to be encapsulated in start and end.
20 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
21 / 50
The ______ service # is not used in any interrupt.
22 / 50
The BIOS interrupt ________ can be used to configure RTC.
23 / 50
______ is LED control byte.
24 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
25 / 50
26 / 50
Communication between keyboard and keyboard controller is __________.
27 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
28 / 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);
29 / 50
NMI Stand for
30 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
31 / 50
Int ________ is used to control the printer via the BIOS.
32 / 50
Standard PC operates in two modes in terms of memory which are
33 / 50
On the execution of IRET instruction, number of bytes popped from stack is
34 / 50
DMA stands for_________
35 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
36 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
37 / 50
------------ is used to read time from RTC
38 / 50
Which port is known as Data Port______
39 / 50
Maximum number of interrupts in a standard PC is
40 / 50
There are two main types of interrupts namely _________________.
41 / 50
Software based flow control make use of -------- control characters
42 / 50
In self test mode the output of the UART is routed to its input.
43 / 50
File can be______ viewed as collection of clusters or blocks.
44 / 50
There are two main types of interrupts, namely
45 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
46 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
47 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
48 / 50
File system used in CD’s is_______ file system
49 / 50
In self test mode the output of the UART is routed to its input
50 / 50
Int 14H __________ can be used to receive a byte.
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