CS609-Midterm
1 / 50
To store each character in keyboard buffer ____ bytes are required.
2 / 50
Int ________ is used to control the printer via the BIOS.
3 / 50
The interval timer can operate in ____modes.
4 / 50
_____ bit is cleared to indicate the low nibble is being sent.
5 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
6 / 50
There are two type of communication synchronous and Anti Synchronous
7 / 50
Int 14H __________ can be used to receive a byte.
8 / 50
BIOS support _____________UARTS as COM ports.
9 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
10 / 50
A single interrupt controller can arbitrate among ____ different devices.
11 / 50
______ is used to set time.
12 / 50
Maximum number of interrupts in a standard PC is
13 / 50
The service _________ is called the keyboard hook service.
14 / 50
A software interrupt does not require EOI (End of interrupt).
15 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
16 / 50
The BIOS interrupt ________ can be used to configure RTC.
17 / 50
DCE is _____________
18 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
19 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
20 / 50
Int 14H____________ can be used to send a byte
21 / 50
UART stands for_______
22 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
23 / 50
Operating system name contains ____ bytes in boot block.
24 / 50
Following is not a method of I/O
25 / 50
REGS is a Union
26 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
27 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
28 / 50
___________ is used to identify cause of interrupt.
29 / 50
Interrupt 9 usually reads the _________ from keyboard.
30 / 50
PPI stands for
31 / 50
Which of the following are types of ISR __________.
32 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
33 / 50
The keyboard makes use of interrupt number _______ for its input operations.
34 / 50
Standard PC operates in two modes in terms of memory which are
35 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
36 / 50
DTE is ___________
37 / 50
Tail of keyboard should get to get the start of buffer.
38 / 50
The ____________ function simply enables the self test facility within the modem control register
39 / 50
The Function of I/O controller is to provide ____________.
40 / 50
________means typematic rate will be sent in next byte.
41 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
42 / 50
Only ________ ports are important from programming point of view.
43 / 50
The output on the monitor is controlled by a controller called __________within the PC.
44 / 50
______ is Disk interrupt.
45 / 50
Hardware Interrupts are __________.
46 / 50
DSR stands for __________ .
47 / 50
48 / 50
BPB stands for _________.
49 / 50
The interval timer can operate in _______ modes.
50 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
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