CS609-Midterm
1 / 50
The keyboard makes use of interrupt number _______ for its input operations.
2 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
3 / 50
Interrupt _____ is empty; we can use its vector as a flag.
4 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
5 / 50
Standard PC can have _____ PPI.
6 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
7 / 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);
8 / 50
By cascading two DMAs ____ bits can be transferred.
9 / 50
To distinguish 486 with Pentium CPUID Test is used.
10 / 50
------------ is used to read date from RTC
11 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
12 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
13 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
14 / 50
Maximum number of interrupts in a standard PC is
15 / 50
The ______ service # is not used in any interrupt.
16 / 50
___________ is used to identify cause of interrupt.
17 / 50
Standard PC operates in two modes in terms of memory which are
18 / 50
File can be______ viewed as collection of clusters or blocks.
19 / 50
Hardware Interrupts are __________.
20 / 50
21 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
22 / 50
BIOS support _____________UARTS as COM ports.
23 / 50
Software based flow control make use of -------- control characters
24 / 50
_____ bit is cleared to indicate the low nibble is being sent.
25 / 50
Communication between keyboard and keyboard controller is __________.
26 / 50
Keyboard Status Byte is located at the address
27 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
28 / 50
Following is not a method of I/O
29 / 50
A software interrupt does not require EOI (End of interrupt).
30 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
31 / 50
Display device (Monitor) performs _________ I/O.
32 / 50
The interval timer can operate in ____modes.
33 / 50
There are two main types of interrupts namely _________________.
34 / 50
Counter register can be used to divide clock signal.
35 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
36 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
37 / 50
To store each character in keyboard buffer ____ bytes are required.
38 / 50
The ____________ function simply enables the self test facility within the modem control register
39 / 50
40 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
41 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
42 / 50
REGS is a Union
43 / 50
Tail of keyboard should get to get the start of buffer.
44 / 50
Interrupt ______ is used to get or set the time.
45 / 50
Interrupt service number is usually placed in ____________ register.
46 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
47 / 50
_______ is LED control byte.
48 / 50
The output on the monitor is controlled by a controller called __________within the PC.
49 / 50
There are two type of communication synchronous and Anti Synchronous
50 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
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