CS609-Midterm
1 / 50
File system used in CD’s is_______ file system
2 / 50
Timer interrupt is a _________.
3 / 50
Keyboard uses port ____ as status port.
4 / 50
PPI stands for _____________.
5 / 50
DCE stands for __________.
6 / 50
Hardware Interrupts are __________.
7 / 50
The interval timer can operate in ____modes.
8 / 50
9 / 50
Int 14H __________ can be used to receive a byte.
10 / 50
REGS is a Union
11 / 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);
12 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
13 / 50
In ____________each byte is needed to be encapsulated in start and end.
14 / 50
DCE is _____________
15 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
16 / 50
DMA stands for_________
17 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
18 / 50
------------ is used to read date from RTC
19 / 50
Timer interrupt occurs _______ times every second by means of hardware.
20 / 50
______ is Disk interrupt.
21 / 50
In self test mode the output of the UART is routed to its input.
22 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
23 / 50
DSR stands for __________ .
24 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
25 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
26 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
27 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
28 / 50
29 / 50
UART stands for_______
30 / 50
The BIOS interrupt ________ can be used to configure RTC.
31 / 50
NMI Stand for
32 / 50
______ is used to set time.
33 / 50
Keyboard Status Byte is located at the address
34 / 50
BIOS support _____________UARTS as COM ports.
35 / 50
The keyboard makes use of interrupt number _______ for its input operations.
36 / 50
At IRQ 7 Interrupt # ___ is used.
37 / 50
___________ is used to identify cause of interrupt.
38 / 50
BIOS DO NOT support ______.
39 / 50
Register can be used to divide frequency is _________
40 / 50
Display device (Monitor) performs _________ I/O.
41 / 50
42 / 50
Communication between keyboard and keyboard controller is __________.
43 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
44 / 50
Control information in files is maintained using
45 / 50
The ______ service # is not used in any interrupt.
46 / 50
Interrupt 9 usually reads the _________ from keyboard.
47 / 50
BPB stands for _________.
48 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
49 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
50 / 50
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