CS609-Midterm
1 / 50
There are __________ kinds of serial communication.
2 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
3 / 50
_____ bit is cleared to indicate the low nibble is being sent.
4 / 50
To store each character in keyboard buffer ____ bytes are required.
5 / 50
------------ is used to set time from RTC
6 / 50
______ is Disk interrupt.
7 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
8 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
9 / 50
A single interrupt controller can arbitrate among ____ different devices.
10 / 50
Interrupt ______ is used to get or set the time.
11 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
12 / 50
Only ________ ports are important from programming point of view.
13 / 50
Standard PC operates in two modes in terms of memory which are
14 / 50
------------ is used to read time from RTC
15 / 50
Following is not a method of I/O
16 / 50
The output on the monitor is controlled by a controller called __________within the PC.
17 / 50
Keyboard uses port ____ as status port.
18 / 50
In self test mode the output of the UART is routed to its input.
19 / 50
The service number is usually placed in the ________ register.
20 / 50
The ______ service # is not used in any interrupt.
21 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
22 / 50
Int 14H __________ can be used to receive a byte.
23 / 50
The keyboard input character scan code is received at ___ port.
24 / 50
25 / 50
The interval timer can operate in _______ modes.
26 / 50
In keyboard status byte bit no. 2 and 3 are used for ctrl and alt keys respectively. which of the following condition is used to check that Ctrl + Alt keys are pressed. Where: unsigned char far * scr = (unsigned char far *)(0x00400017);
27 / 50
Interrupt _____ is empty; we can use its vector as a flag.
28 / 50
If CPUID instruction is not present then the processor can be a
29 / 50
DCE is _____________
30 / 50
By cascading two DMAs ____ bits can be transferred.
31 / 50
BPB stands for _________.
32 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
33 / 50
Maximum number of interrupts in a standard PC is
34 / 50
Control information in files is maintained using
35 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
36 / 50
37 / 50
Which port is known as Data Port______
38 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
39 / 50
The keyboard makes use of interrupt number _______ for its input operations.
40 / 50
41 / 50
A software interrupt does not require EOI (End of interrupt).
42 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
43 / 50
Display device (Monitor) performs _________ I/O.
44 / 50
On the execution of IRET instruction, number of bytes popped from stack is
45 / 50
______ is LED control byte.
46 / 50
The service _________ is called the keyboard hook service.
47 / 50
DSR stands for __________ .
48 / 50
________means typematic rate will be sent in next byte.
49 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
50 / 50
Operating system name contains ____ bytes in boot block.
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