CS609-Midterm
1 / 50
There are two main types of interrupts, namely
2 / 50
In self test mode the output of the UART is routed to its input.
3 / 50
Int 14H __________ can be used to receive a byte.
4 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
5 / 50
File system used in CD’s is_______ file system
6 / 50
Standard PC can have _____ PPI.
7 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
8 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
9 / 50
Communication between keyboard and keyboard controller is __________.
10 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
11 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
12 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
13 / 50
There are two main types of interrupts namely _________________.
14 / 50
On the execution of IRET instruction, number of bytes popped from stack is
15 / 50
DTE is ____________.
16 / 50
PPI stands for _____________.
17 / 50
The keyboard makes use of interrupt number _______ for its input operations.
18 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
19 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
20 / 50
Keyboard uses port ____ as status port.
21 / 50
Maximum number of interrupts in a standard PC is
22 / 50
To store each character in keyboard buffer ____ bytes are required.
23 / 50
Tail of keyboard should get to get the start of buffer.
24 / 50
The ______ service # is not used in any interrupt.
25 / 50
If keyboard buffer is empty the head and tail points at the same location.
26 / 50
LPTs can be swapped.
27 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
28 / 50
Standard PC operates in two modes in terms of memory which are
29 / 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);
30 / 50
Register can be used to divide frequency is _________
31 / 50
By cascading two DMAs ____ bits can be transferred.
32 / 50
33 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
34 / 50
There are __________ kinds of serial communication.
35 / 50
DCE is _____________
36 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
37 / 50
Command register is an _____ bit register
38 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
39 / 50
______ is Disk interrupt.
40 / 50
41 / 50
Operating system name contains ____ bytes in boot block.
42 / 50
There are two type of communication synchronous and Anti Synchronous
43 / 50
REGS is a Union
44 / 50
Int ________ is used to control the printer via the BIOS.
45 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
46 / 50
Which port is known as Data Port______
47 / 50
------------ is used to read date from RTC
48 / 50
DTE is ___________
49 / 50
Interrupt 9 usually reads the _________ from keyboard.
50 / 50
_________ is used to identify the cause of interrupt.
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