CS609-Midterm
1 / 50
Software based flow control make use of -------- control characters
2 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
3 / 50
_________ is used to identify the cause of interrupt.
4 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
5 / 50
File system used in CD’s is_______ file system
6 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
7 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
8 / 50
UART stands for_______
9 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
10 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
11 / 50
Keyboard uses port ____ as status port.
12 / 50
Interrupt ______ is used to get or set the time.
13 / 50
File can be______ viewed as collection of clusters or blocks.
14 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
15 / 50
The BIOS interrupt ________ can be used to configure RTC.
16 / 50
REGS is a Union
17 / 50
There are two main types of interrupts namely _________________.
18 / 50
The keyboard makes use of interrupt number _______ for its input operations.
19 / 50
Interrupt 9 usually reads the _________ from keyboard.
20 / 50
__________is used to control the printer via the BIOS
21 / 50
The Function of I/O controller is to provide ____________.
22 / 50
Interrupt service number is usually placed in ____________ register.
23 / 50
NMI Stand for
24 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
25 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
26 / 50
Operating system name contains ____ bytes in boot block.
27 / 50
There are __________ kinds of serial communication.
28 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
29 / 50
------------ is used to read time from RTC
30 / 50
To distinguish 486 with Pentium CPUID Test is used.
31 / 50
The service _________ is called the keyboard hook service.
32 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
33 / 50
If CPUID instruction is not present then the processor can be a
34 / 50
35 / 50
PPI is used to perform parallel communication
36 / 50
PPI stands for _____________.
37 / 50
PPI stands for
38 / 50
Tail of keyboard should get to get the start of buffer.
39 / 50
On the execution of IRET instruction, number of bytes popped from stack is
40 / 50
Which port is known as Data Port______
41 / 50
DCE is _____________
42 / 50
Only ________ ports are important from programming point of view.
43 / 50
There are two type of communication synchronous and Anti Synchronous
44 / 50
By cascading two DMAs ____ bits can be transferred.
45 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
46 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
47 / 50
The ______ service # is not used in any interrupt.
48 / 50
The keyboard input character scan code is received at ___ port.
49 / 50
Timer interrupt is a _________.
50 / 50
If keyboard buffer is empty the head and tail points at the same location.
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