CS609-Midterm
1 / 50
_____ bit is cleared to indicate the low nibble is being sent.
2 / 50
Keyboard Status Byte is located at the address
3 / 50
Control information in files is maintained using
4 / 50
DSR stands for __________ .
5 / 50
DTE is ____________.
6 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
7 / 50
Communication between keyboard and keyboard controller is __________.
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9 / 50
Timer interrupt is a _________.
10 / 50
PPI stands for
11 / 50
______ is used to set time.
12 / 50
Tail of keyboard should get to get the start of buffer.
13 / 50
Keyboard uses port ____ as status port.
14 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
15 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
16 / 50
PPI is used to perform parallel communication
17 / 50
The keyboard makes use of interrupt number _______ for its input operations.
18 / 50
By cascading two DMAs ____ bits can be transferred.
19 / 50
Operating system name contains ____ bytes in boot block.
20 / 50
21 / 50
In ____________each byte is needed to be encapsulated in start and end.
22 / 50
Software based flow control make use of -------- control characters
23 / 50
The ____________ function simply enables the self test facility within the modem control register
24 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
25 / 50
There are two main types of interrupts namely _________________.
26 / 50
The output on the monitor is controlled by a controller called __________within the PC.
27 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
28 / 50
Register can be used to divide frequency is _________
29 / 50
NMI Stand for
30 / 50
The Function of I/O controller is to provide ____________.
31 / 50
------------ is used to read date from RTC
32 / 50
There are two main types of interrupts, namely
33 / 50
File system used in CD’s is_______ file system
34 / 50
Only ________ ports are important from programming point of view.
35 / 50
The ______ service # is not used in any interrupt.
36 / 50
The BIOS interrupt ________ can be used to configure RTC.
37 / 50
Hardware Interrupts are __________.
38 / 50
There are __________ kinds of serial communication.
39 / 50
If CPUID instruction is not present then the processor can be a
40 / 50
LPTs can be swapped.
41 / 50
Which port is known as Data Port______
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43 / 50
In self test mode the output of the UART is routed to its input
44 / 50
The service number is usually placed in the ________ register.
45 / 50
46 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
47 / 50
The keyboard input character scan code is received at ___ port.
48 / 50
Display device (Monitor) performs _________ I/O.
49 / 50
_______ is LED control byte.
50 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
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