CS609-Midterm
1 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
2 / 50
DMA stands for_________
3 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
4 / 50
By cascading two DMAs ____ bits can be transferred.
5 / 50
DTE is ___________
6 / 50
The service number is usually placed in the ________ register.
7 / 50
Software based flow control make use of -------- control characters
8 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
9 / 50
Timer interrupt is a _________.
10 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
11 / 50
File system used in CD’s is_______ file system
12 / 50
There are two main types of interrupts namely _________________.
13 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
14 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
15 / 50
Maximum number of interrupts in a standard PC is
16 / 50
______ is used to set time.
17 / 50
________means typematic rate will be sent in next byte.
18 / 50
On the execution of IRET instruction, number of bytes popped from stack is
19 / 50
20 / 50
LPTs can be swapped.
21 / 50
In ____________each byte is needed to be encapsulated in start and end.
22 / 50
Only ________ ports are important from programming point of view.
23 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
24 / 50
The keyboard makes use of interrupt number _______ for its input operations.
25 / 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);
26 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
27 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
28 / 50
The service _________ is called the keyboard hook service.
29 / 50
Interrupt 9 usually reads the _________ from keyboard.
30 / 50
Which of the following are types of ISR __________.
31 / 50
Int ________ is used to control the printer via the BIOS.
32 / 50
The interval timer can operate in ____modes.
33 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
34 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
35 / 50
Command register is an _____ bit register
36 / 50
UART stands for_______
37 / 50
There are two type of communication synchronous and Anti Synchronous
38 / 50
DCE stands for __________.
39 / 50
A software interrupt does not require EOI (End of interrupt).
40 / 50
Control information in files is maintained using
41 / 50
___________ is used to identify cause of interrupt.
42 / 50
PPI stands for _____________.
43 / 50
______ is LED control byte.
44 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
45 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
46 / 50
The BIOS interrupt ________ can be used to configure RTC.
47 / 50
BPB stands for _________.
48 / 50
To distinguish 486 with Pentium CPUID Test is used.
49 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
50 / 50
If CPUID instruction is not present then the processor can be a
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