CS609-Midterm
1 / 50
Hardware Interrupts are __________.
2 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
3 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
4 / 50
Display device (Monitor) performs _________ I/O.
5 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
6 / 50
Int ________ is used to control the printer via the BIOS.
7 / 50
The service _________ is called the keyboard hook service.
8 / 50
In ____________each byte is needed to be encapsulated in start and end.
9 / 50
The BIOS interrupt ________ can be used to configure RTC.
10 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
11 / 50
Only ________ ports are important from programming point of view.
12 / 50
The keyboard makes use of interrupt number _______ for its input operations.
13 / 50
Interrupt 9 usually reads the _________ from keyboard.
14 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
15 / 50
________means typematic rate will be sent in next byte.
16 / 50
The interval timer can operate in _______ modes.
17 / 50
The Function of I/O controller is to provide ____________.
18 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
19 / 50
By cascading two DMAs ____ bits can be transferred.
20 / 50
If keyboard buffer is empty the head and tail points at the same location.
21 / 50
Following is not a method of I/O
22 / 50
In self test mode the output of the UART is routed to its input.
23 / 50
24 / 50
Standard PC operates in two modes in terms of memory which are
25 / 50
__________is used to control the printer via the BIOS
26 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
27 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
28 / 50
Interrupt ______ is used to get or set the time.
29 / 50
Int 14H____________ can be used to send a byte
30 / 50
------------ is used to set time from RTC
31 / 50
Keyboard uses port ____ as status port.
32 / 50
BIOS support _____________UARTS as COM ports.
33 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
34 / 50
Register can be used to divide frequency is _________
35 / 50
File can be______ viewed as collection of clusters or blocks.
36 / 50
There are two main types of interrupts namely _________________.
37 / 50
_______ is LED control byte.
38 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
39 / 50
40 / 50
Software based flow control make use of -------- control characters
41 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
42 / 50
Keyboard Status Byte is located at the address
43 / 50
DSR stands for __________ .
44 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
45 / 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);
46 / 50
DTE is ____________.
47 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
48 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
49 / 50
To store each character in keyboard buffer ____ bytes are required.
50 / 50
REGS is a Union
Your score is
The average score is 0%
Restart quiz
