CS609-Midterm
1 / 50
Following is not a method of I/O
2 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
3 / 50
The keyboard makes use of interrupt number _______ for its input operations.
4 / 50
DTE is ____________.
5 / 50
BIOS DO NOT support ______.
6 / 50
By cascading two DMAs ____ bits can be transferred.
7 / 50
The interval timer can operate in ____modes.
8 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
9 / 50
Display device (Monitor) performs _________ I/O.
10 / 50
11 / 50
In self test mode the output of the UART is routed to its input.
12 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
13 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
14 / 50
A single interrupt controller can arbitrate among ____ different devices.
15 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
16 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
17 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
18 / 50
To store each character in keyboard buffer ____ bytes are required.
19 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
20 / 50
The keyboard input character scan code is received at ___ port.
21 / 50
DSR stands for __________ .
22 / 50
Each paragraph in keep function is ____ bytes in size.
23 / 50
DCE stands for __________.
24 / 50
Which port is known as Data Port______
25 / 50
Control information in files is maintained using
26 / 50
Timer interrupt occurs _______ times every second by means of hardware.
27 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
28 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
29 / 50
The ____________ function simply enables the self test facility within the modem control register
30 / 50
Timer interrupt is a _________.
31 / 50
The ______ service # is not used in any interrupt.
32 / 50
The output on the monitor is controlled by a controller called __________within the PC.
33 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
34 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
35 / 50
NMI Stand for
36 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
37 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
38 / 50
The service number is usually placed in the ________ register.
39 / 50
There are two main types of interrupts, namely
40 / 50
Maximum number of interrupts in a standard PC is
41 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
42 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
43 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
44 / 50
Keyboard uses port ____ as status port.
45 / 50
Int 14H __________ can be used to receive a byte.
46 / 50
_____ bit is cleared to indicate the low nibble is being sent.
47 / 50
48 / 50
DTE is ___________
49 / 50
The Function of I/O controller is to provide ____________.
50 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
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