CS609-Midterm
1 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
2 / 50
DMA stands for_________
3 / 50
Control information in files is maintained using
4 / 50
Display device (Monitor) performs _________ I/O.
5 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
6 / 50
Interrupt service number is usually placed in ____________ register.
7 / 50
Keyboard uses port ____ as status port.
8 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
9 / 50
If keyboard buffer is empty the head and tail points at the same location.
10 / 50
_____ bit is cleared to indicate the low nibble is being sent.
11 / 50
DSR stands for __________ .
12 / 50
There are two main types of interrupts namely _________________.
13 / 50
Interrupt 9 usually reads the _________ from keyboard.
14 / 50
DCE is _____________
15 / 50
16 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
17 / 50
______ is LED control byte.
18 / 50
UART stands for_______
19 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
20 / 50
21 / 50
If CPUID instruction is not present then the processor can be a
22 / 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);
23 / 50
Timer interrupt is a _________.
24 / 50
Hardware Interrupts are __________.
25 / 50
Following is not a method of I/O
26 / 50
27 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
28 / 50
Counter register can be used to divide clock signal.
29 / 50
The interval timer can operate in ____modes.
30 / 50
There are __________ kinds of serial communication.
31 / 50
The interval timer can operate in _______ modes.
32 / 50
Interrupt ______ is used to get or set the time.
33 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
34 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
35 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
36 / 50
In ____________each byte is needed to be encapsulated in start and end.
37 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
38 / 50
In self test mode the output of the UART is routed to its input.
39 / 50
File system used in CD’s is_______ file system
40 / 50
PPI is used to perform parallel communication
41 / 50
Int ________ is used to control the printer via the BIOS.
42 / 50
By cascading two DMAs ____ bits can be transferred.
43 / 50
______ is used to set time.
44 / 50
Only ________ ports are important from programming point of view.
45 / 50
46 / 50
The keyboard makes use of interrupt number _______ for its input operations.
47 / 50
Register can be used to divide frequency is _________
48 / 50
DTE is ____________.
49 / 50
Tail of keyboard should get to get the start of buffer.
50 / 50
_________ is used to identify the cause of interrupt.
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