CS609-Midterm
1 / 50
At IRQ 7 Interrupt # ___ is used.
2 / 50
In ____________each byte is needed to be encapsulated in start and end.
3 / 50
Operating system name contains ____ bytes in boot block.
4 / 50
The Function of I/O controller is to provide ____________.
5 / 50
Counter register can be used to divide clock signal.
6 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
7 / 50
PPI stands for
8 / 50
Timer interrupt is a _________.
9 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
10 / 50
DMA stands for_________
11 / 50
There are __________ kinds of serial communication.
12 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
13 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
14 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
15 / 50
DCE is _____________
16 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
17 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
18 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
19 / 50
Software based flow control make use of -------- control characters
20 / 50
Keyboard Status Byte is located at the address
21 / 50
Hardware Interrupts are __________.
22 / 50
23 / 50
If keyboard buffer is empty the head and tail points at the same location.
24 / 50
_____ bit is cleared to indicate the low nibble is being sent.
25 / 50
The BIOS interrupt ________ can be used to configure RTC.
26 / 50
Each paragraph in keep function is ____ bytes in size.
27 / 50
There are two type of communication synchronous and Anti Synchronous
28 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
29 / 50
Int ________ is used to control the printer via the BIOS.
30 / 50
Keyboard uses port ____ as status port.
31 / 50
The ____________ function simply enables the self test facility within the modem control register
32 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
33 / 50
Control information in files is maintained using
34 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
35 / 50
Display device (Monitor) performs _________ I/O.
36 / 50
______ is LED control byte.
37 / 50
PPI stands for _____________.
38 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
39 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
40 / 50
41 / 50
Register can be used to divide frequency is _________
42 / 50
------------ is used to set time from RTC
43 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
44 / 50
45 / 50
Interrupt 9 usually reads the _________ from keyboard.
46 / 50
DSR stands for __________ .
47 / 50
Interrupt service number is usually placed in ____________ register.
48 / 50
_______ is LED control byte.
49 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
50 / 50
______ is Disk interrupt.
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