CS609-Midterm
1 / 50
The interval timer can operate in _______ modes.
2 / 50
The interval timer can operate in ____modes.
3 / 50
The ______ service # is not used in any interrupt.
4 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
5 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
6 / 50
DTE is ____________.
7 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
8 / 50
Following is not a method of I/O
9 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
10 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
11 / 50
The ____________ function simply enables the self test facility within the modem control register
12 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
13 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
14 / 50
15 / 50
The output on the monitor is controlled by a controller called __________within the PC.
16 / 50
To distinguish 486 with Pentium CPUID Test is used.
17 / 50
DTE is ___________
18 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
19 / 50
In ____________each byte is needed to be encapsulated in start and end.
20 / 50
PPI is used to perform parallel communication
21 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
22 / 50
Display device (Monitor) performs _________ I/O.
23 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
24 / 50
______ is LED control byte.
25 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
26 / 50
PPI stands for
27 / 50
Command register is an _____ bit register
28 / 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);
29 / 50
By cascading two DMAs ____ bits can be transferred.
30 / 50
UART stands for_______
31 / 50
Int 14H __________ can be used to receive a byte.
32 / 50
33 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
34 / 50
At IRQ 7 Interrupt # ___ is used.
35 / 50
36 / 50
In self test mode the output of the UART is routed to its input
37 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
38 / 50
BPB stands for _________.
39 / 50
Operating system name contains ____ bytes in boot block.
40 / 50
NMI Stand for
41 / 50
A software interrupt does not require EOI (End of interrupt).
42 / 50
The keyboard input character scan code is received at ___ port.
43 / 50
Counter register can be used to divide clock signal.
44 / 50
Control information in files is maintained using
45 / 50
File system used in CD’s is_______ file system
46 / 50
The keyboard makes use of interrupt number _______ for its input operations.
47 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
48 / 50
Which port is known as Data Port______
49 / 50
------------ is used to read time from RTC
50 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
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