CS609-Midterm
1 / 50
There are two type of communication synchronous and Anti Synchronous
2 / 50
BPB stands for _________.
3 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
4 / 50
______ is LED control byte.
5 / 50
BIOS support _____________UARTS as COM ports.
6 / 50
______ is Disk interrupt.
7 / 50
_________ is used to identify the cause of interrupt.
8 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
9 / 50
DSR stands for __________ .
10 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
11 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
12 / 50
Operating system name contains ____ bytes in boot block.
13 / 50
Only ________ ports are important from programming point of view.
14 / 50
The interval timer can operate in ____modes.
15 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
16 / 50
Tail of keyboard should get to get the start of buffer.
17 / 50
_____ bit is cleared to indicate the low nibble is being sent.
18 / 50
Int ________ is used to control the printer via the BIOS.
19 / 50
The keyboard makes use of interrupt number _______ for its input operations.
20 / 50
There are __________ kinds of serial communication.
21 / 50
In self test mode the output of the UART is routed to its input.
22 / 50
Hardware Interrupts are __________.
23 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
24 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
25 / 50
There are two main types of interrupts namely _________________.
26 / 50
The service number is usually placed in the ________ register.
27 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
28 / 50
______ is used to set time.
29 / 50
Timer interrupt is a _________.
30 / 50
To distinguish 486 with Pentium CPUID Test is used.
31 / 50
Keyboard uses port ____ as status port.
32 / 50
Command register is an _____ bit register
33 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
34 / 50
File system used in CD’s is_______ file system
35 / 50
36 / 50
If keyboard buffer is empty the head and tail points at the same location.
37 / 50
_______ is LED control byte.
38 / 50
Timer interrupt occurs _______ times every second by means of hardware.
39 / 50
40 / 50
DMA stands for_________
41 / 50
Int 14H____________ can be used to send a byte
42 / 50
Standard PC can have _____ PPI.
43 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
44 / 50
Control information in files is maintained using
45 / 50
Interrupt ______ is used to get or set the time.
46 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
47 / 50
___________ is used to identify cause of interrupt.
48 / 50
DCE is _____________
49 / 50
The service _________ is called the keyboard hook service.
50 / 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);
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