CS609-Midterm
1 / 50
______ is LED control byte.
2 / 50
Interrupt ______ is used to get or set the time.
3 / 50
There are __________ kinds of serial communication.
4 / 50
Which of the following are types of ISR __________.
5 / 50
DTE is ____________.
6 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
7 / 50
Only ________ ports are important from programming point of view.
8 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
9 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
10 / 50
Display device (Monitor) performs _________ I/O.
11 / 50
Operating system name contains ____ bytes in boot block.
12 / 50
The interval timer can operate in _______ modes.
13 / 50
The keyboard input character scan code is received at ___ port.
14 / 50
To store each character in keyboard buffer ____ bytes are required.
15 / 50
There are two type of communication synchronous and Anti Synchronous
16 / 50
The ______ service # is not used in any interrupt.
17 / 50
DCE stands for __________.
18 / 50
The Function of I/O controller is to provide ____________.
19 / 50
DTE is ___________
20 / 50
_________ is used to identify the cause of interrupt.
21 / 50
Control information in files is maintained using
22 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
23 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
24 / 50
On the execution of IRET instruction, number of bytes popped from stack is
25 / 50
------------ is used to read date from RTC
26 / 50
DSR stands for __________ .
27 / 50
Tail of keyboard should get to get the start of buffer.
28 / 50
Standard PC can have _____ PPI.
29 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
30 / 50
Software based flow control make use of -------- control characters
31 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
32 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
33 / 50
PPI is used to perform parallel communication
34 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
35 / 50
Counter register can be used to divide clock signal.
36 / 50
DCE is _____________
37 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
38 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
39 / 50
The keyboard makes use of interrupt number _______ for its input operations.
40 / 50
Communication between keyboard and keyboard controller is __________.
41 / 50
Maximum number of interrupts in a standard PC is
42 / 50
At IRQ 7 Interrupt # ___ is used.
43 / 50
Hardware Interrupts are __________.
44 / 50
PPI stands for _____________.
45 / 50
46 / 50
The output on the monitor is controlled by a controller called __________within the PC.
47 / 50
Int 14H __________ can be used to receive a byte.
48 / 50
49 / 50
File system used in CD’s is_______ file system
50 / 50
The BIOS interrupt ________ can be used to configure RTC.
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