CS609-Midterm
1 / 50
Following is not a method of I/O
2 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
3 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
4 / 50
BIOS DO NOT support ______.
5 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
6 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
7 / 50
If CPUID instruction is not present then the processor can be a
8 / 50
DCE is _____________
9 / 50
BPB stands for _________.
10 / 50
At IRQ 7 Interrupt # ___ is used.
11 / 50
File system used in CD’s is_______ file system
12 / 50
A single interrupt controller can arbitrate among ____ different devices.
13 / 50
If keyboard buffer is empty the head and tail points at the same location.
14 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
15 / 50
Keyboard uses port ____ as status port.
16 / 50
Each paragraph in keep function is ____ bytes in size.
17 / 50
REGS is a Union
18 / 50
Interrupt 9 usually reads the _________ from keyboard.
19 / 50
The ______ service # is not used in any interrupt.
20 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
21 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
22 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
23 / 50
DSR stands for __________ .
24 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
25 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
26 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
27 / 50
Which port is known as Data Port______
28 / 50
The ____________ function simply enables the self test facility within the modem control register
29 / 50
The keyboard makes use of interrupt number _______ for its input operations.
30 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
31 / 50
The Function of I/O controller is to provide ____________.
32 / 50
_____ bit is cleared to indicate the low nibble is being sent.
33 / 50
Int 14H __________ can be used to receive a byte.
34 / 50
LPTs can be swapped.
35 / 50
36 / 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);
37 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
38 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
39 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
40 / 50
41 / 50
DTE is ___________
42 / 50
Register can be used to divide frequency is _________
43 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
44 / 50
By cascading two DMAs ____ bits can be transferred.
45 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
46 / 50
Timer interrupt is a _________.
47 / 50
Display device (Monitor) performs _________ I/O.
48 / 50
The service _________ is called the keyboard hook service.
49 / 50
The interval timer can operate in ____modes.
50 / 50
There are __________ kinds of serial communication.
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