CS609-Midterm
1 / 50
Standard PC operates in two modes in terms of memory which are
2 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
3 / 50
Timer interrupt occurs _______ times every second by means of hardware.
4 / 50
Following is not a method of I/O
5 / 50
Interrupt ______ is used to get or set the time.
6 / 50
If keyboard buffer is empty the head and tail points at the same location.
7 / 50
Which of the following are types of ISR __________.
8 / 50
The keyboard input character scan code is received at ___ port.
9 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
10 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
11 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
12 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
13 / 50
At IRQ 7 Interrupt # ___ is used.
14 / 50
Keyboard uses port ____ as status port.
15 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
16 / 50
The output on the monitor is controlled by a controller called __________within the PC.
17 / 50
18 / 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);
19 / 50
Communication between keyboard and keyboard controller is __________.
20 / 50
______ is Disk interrupt.
21 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
22 / 50
Interrupt 9 usually reads the _________ from keyboard.
23 / 50
Int 14H____________ can be used to send a byte
24 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
25 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
26 / 50
There are __________ kinds of serial communication.
27 / 50
DTE is ____________.
28 / 50
The interval timer can operate in ____modes.
29 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
30 / 50
Interrupt _____ is empty; we can use its vector as a flag.
31 / 50
The service _________ is called the keyboard hook service.
32 / 50
REGS is a Union
33 / 50
------------ is used to read time from RTC
34 / 50
______ is LED control byte.
35 / 50
File system used in CD’s is_______ file system
36 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
37 / 50
Int 14H __________ can be used to receive a byte.
38 / 50
Counter register can be used to divide clock signal.
39 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
40 / 50
In self test mode the output of the UART is routed to its input
41 / 50
DSR stands for __________ .
42 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
43 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
44 / 50
Hardware Interrupts are __________.
45 / 50
_____ bit is cleared to indicate the low nibble is being sent.
46 / 50
Each paragraph in keep function is ____ bytes in size.
47 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
48 / 50
PPI stands for
49 / 50
By cascading two DMAs ____ bits can be transferred.
50 / 50
_________ is used to identify the cause of interrupt.
Your score is
The average score is 0%
Restart quiz
