CS609-Midterm
1 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
2 / 50
Following is not a method of I/O
3 / 50
The interval timer can operate in ____modes.
4 / 50
Int ________ is used to control the printer via the BIOS.
5 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
6 / 50
PPI is used to perform parallel communication
7 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
8 / 50
------------ is used to set time from RTC
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DTE is ____________.
10 / 50
The interval timer can operate in _______ modes.
11 / 50
File system used in CD’s is_______ file system
12 / 50
__________is used to control the printer via the BIOS
13 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
14 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
15 / 50
___________ is used to identify cause of interrupt.
16 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
17 / 50
18 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
19 / 50
BIOS DO NOT support ______.
20 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
21 / 50
______ is LED control byte.
22 / 50
In self test mode the output of the UART is routed to its input.
23 / 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);
24 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
25 / 50
Register can be used to divide frequency is _________
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Total No. of bytes that can be stored in Keyboard Buffer is____.
27 / 50
The keyboard makes use of interrupt number _______ for its input operations.
28 / 50
Standard PC can have _____ PPI.
29 / 50
Keyboard Status Byte is located at the address
30 / 50
The ____________ function simply enables the self test facility within the modem control register
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32 / 50
Maximum number of interrupts in a standard PC is
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_______ is LED control byte.
34 / 50
Standard PC operates in two modes in terms of memory which are
35 / 50
BPB stands for _________.
36 / 50
DSR stands for __________ .
37 / 50
DMA stands for_________
38 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
39 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
40 / 50
_____ bit is cleared to indicate the low nibble is being sent.
41 / 50
_________ is used to identify the cause of interrupt.
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43 / 50
Int 14H __________ can be used to receive a byte.
44 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
45 / 50
PPI stands for _____________.
46 / 50
________means typematic rate will be sent in next byte.
47 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
48 / 50
Only ________ ports are important from programming point of view.
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50 / 50
There are two type of communication synchronous and Anti Synchronous
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