CS609-Midterm
1 / 50
A single interrupt controller can arbitrate among ____ different devices.
2 / 50
_____ bit is cleared to indicate the low nibble is being sent.
3 / 50
_________ is used to identify the cause of interrupt.
4 / 50
Each paragraph in keep function is ____ bytes in size.
5 / 50
A software interrupt does not require EOI (End of interrupt).
6 / 50
Standard PC operates in two modes in terms of memory which are
7 / 50
The keyboard makes use of interrupt number _______ for its input operations.
8 / 50
Standard PC can have _____ PPI.
9 / 50
In self test mode the output of the UART is routed to its input.
10 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
11 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
12 / 50
BPB stands for _________.
13 / 50
Interrupt ______ is used to get or set the time.
14 / 50
Command register is an _____ bit register
15 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
16 / 50
DCE is _____________
17 / 50
NMI Stand for
18 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
19 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
20 / 50
The interval timer can operate in ____modes.
21 / 50
Only ________ ports are important from programming point of view.
22 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
23 / 50
On the execution of IRET instruction, number of bytes popped from stack is
24 / 50
______ is used to set time.
25 / 50
REGS is a Union
26 / 50
DTE is ____________.
27 / 50
The interval timer can operate in _______ modes.
28 / 50
Maximum number of interrupts in a standard PC is
29 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
30 / 50
Timer interrupt occurs _______ times every second by means of hardware.
31 / 50
DSR stands for __________ .
32 / 50
__________is used to control the printer via the BIOS
33 / 50
Interrupt service number is usually placed in ____________ register.
34 / 50
___________ is used to identify cause of interrupt.
35 / 50
At IRQ 7 Interrupt # ___ is used.
36 / 50
The ______ service # is not used in any interrupt.
37 / 50
38 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
39 / 50
Which of the following are types of ISR __________.
40 / 50
File can be______ viewed as collection of clusters or blocks.
41 / 50
Keyboard uses port ____ as status port.
42 / 50
Register can be used to divide frequency is _________
43 / 50
To store each character in keyboard buffer ____ bytes are required.
44 / 50
45 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
46 / 50
Hardware Interrupts are __________.
47 / 50
PPI is used to perform parallel communication
48 / 50
File system used in CD’s is_______ file system
49 / 50
There are two main types of interrupts namely _________________.
50 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
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