CS609-Midterm
1 / 50
The Function of I/O controller is to provide ____________.
2 / 50
There are two type of communication synchronous and Anti Synchronous
3 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
4 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
5 / 50
Standard PC operates in two modes in terms of memory which are
6 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
7 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
8 / 50
9 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
10 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
11 / 50
Counter register can be used to divide clock signal.
12 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
13 / 50
BIOS support _____________UARTS as COM ports.
14 / 50
A software interrupt does not require EOI (End of interrupt).
15 / 50
_______ is LED control byte.
16 / 50
There are __________ kinds of serial communication.
17 / 50
In self test mode the output of the UART is routed to its input.
18 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
19 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
20 / 50
Interrupt ______ is used to get or set the time.
21 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
22 / 50
_____ bit is cleared to indicate the low nibble is being sent.
23 / 50
DCE stands for __________.
24 / 50
Int 14H __________ can be used to receive a byte.
25 / 50
Operating system name contains ____ bytes in boot block.
26 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
27 / 50
Int ________ is used to control the printer via the BIOS.
28 / 50
If keyboard buffer is empty the head and tail points at the same location.
29 / 50
Following is not a method of I/O
30 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
31 / 50
32 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
33 / 50
DTE is ___________
34 / 50
35 / 50
The keyboard makes use of interrupt number _______ for its input operations.
36 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
37 / 50
The ______ service # is not used in any interrupt.
38 / 50
Which of the following are types of ISR __________.
39 / 50
Hardware Interrupts are __________.
40 / 50
File system used in CD’s is_______ file system
41 / 50
______ is Disk interrupt.
42 / 50
Register can be used to divide frequency is _________
43 / 50
The interval timer can operate in ____modes.
44 / 50
DTE is ____________.
45 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
46 / 50
47 / 50
Interrupt service number is usually placed in ____________ register.
48 / 50
By cascading two DMAs ____ bits can be transferred.
49 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
50 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
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