CS609-Midterm
1 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
2 / 50
BIOS DO NOT support ______.
3 / 50
The keyboard makes use of interrupt number _______ for its input operations.
4 / 50
PPI stands for _____________.
5 / 50
In self test mode the output of the UART is routed to its input.
6 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
7 / 50
DCE is _____________
8 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
9 / 50
Timer interrupt occurs _______ times every second by means of hardware.
10 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
11 / 50
Counter register can be used to divide clock signal.
12 / 50
There are two type of communication synchronous and Anti Synchronous
13 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
14 / 50
The keyboard input character scan code is received at ___ port.
15 / 50
DTE is ____________.
16 / 50
_________ is used to identify the cause of interrupt.
17 / 50
18 / 50
Maximum number of interrupts in a standard PC is
19 / 50
Operating system name contains ____ bytes in boot block.
20 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
21 / 50
Int 14H____________ can be used to send a byte
22 / 50
Only ________ ports are important from programming point of view.
23 / 50
Tail of keyboard should get to get the start of buffer.
24 / 50
By cascading two DMAs ____ bits can be transferred.
25 / 50
------------ is used to set time from RTC
26 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
27 / 50
________means typematic rate will be sent in next byte.
28 / 50
Interrupt _____ is empty; we can use its vector as a flag.
29 / 50
The interval timer can operate in ____modes.
30 / 50
31 / 50
32 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
33 / 50
Keyboard Status Byte is located at the address
34 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
35 / 50
Control information in files is maintained using
36 / 50
The ____________ function simply enables the self test facility within the modem control register
37 / 50
Which of the following are types of ISR __________.
38 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
39 / 50
To store each character in keyboard buffer ____ bytes are required.
40 / 50
In self test mode the output of the UART is routed to its input
41 / 50
PPI is used to perform parallel communication
42 / 50
Standard PC operates in two modes in terms of memory which are
43 / 50
Keyboard uses port ____ as status port.
44 / 50
DCE stands for __________.
45 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
46 / 50
------------ is used to read date from RTC
47 / 50
REGS is a Union
48 / 50
Following is not a method of I/O
49 / 50
______ is used to set time.
50 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
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