CS609-Midterm
1 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
2 / 50
On the execution of IRET instruction, number of bytes popped from stack is
3 / 50
LPTs can be swapped.
4 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
5 / 50
_____ bit is cleared to indicate the low nibble is being sent.
6 / 50
In self test mode the output of the UART is routed to its input.
7 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
8 / 50
The ______ service # is not used in any interrupt.
9 / 50
UART stands for_______
10 / 50
The output on the monitor is controlled by a controller called __________within the PC.
11 / 50
The keyboard makes use of interrupt number _______ for its input operations.
12 / 50
File system used in CD’s is_______ file system
13 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
14 / 50
DSR stands for __________ .
15 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
16 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
17 / 50
NMI Stand for
18 / 50
19 / 50
20 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
21 / 50
PPI stands for
22 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
23 / 50
In ____________each byte is needed to be encapsulated in start and end.
24 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
25 / 50
There are two main types of interrupts, namely
26 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
27 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
28 / 50
Interrupt _____ is empty; we can use its vector as a flag.
29 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
30 / 50
Display device (Monitor) performs _________ I/O.
31 / 50
DTE is ____________.
32 / 50
There are two main types of interrupts namely _________________.
33 / 50
34 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
35 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
36 / 50
Only ________ ports are important from programming point of view.
37 / 50
38 / 50
DMA stands for_________
39 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
40 / 50
A software interrupt does not require EOI (End of interrupt).
41 / 50
The ____________ function simply enables the self test facility within the modem control register
42 / 50
DCE stands for __________.
43 / 50
Keyboard uses port ____ as status port.
44 / 50
Interrupt ______ is used to get or set the time.
45 / 50
BIOS DO NOT support ______.
46 / 50
The interval timer can operate in ____modes.
47 / 50
BIOS support _____________UARTS as COM ports.
48 / 50
A single interrupt controller can arbitrate among ____ different devices.
49 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
50 / 50
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