CS609-Midterm
1 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
2 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
3 / 50
The keyboard makes use of interrupt number _______ for its input operations.
4 / 50
There are two type of communication synchronous and Anti Synchronous
5 / 50
Each paragraph in keep function is ____ bytes in size.
6 / 50
DSR stands for __________ .
7 / 50
File can be______ viewed as collection of clusters or blocks.
8 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
9 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
10 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
11 / 50
Which of the following are types of ISR __________.
12 / 50
Counter register can be used to divide clock signal.
13 / 50
Display device (Monitor) performs _________ I/O.
14 / 50
DCE is _____________
15 / 50
The ______ service # is not used in any interrupt.
16 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
17 / 50
_____ bit is cleared to indicate the low nibble is being sent.
18 / 50
DMA stands for_________
19 / 50
LPTs can be swapped.
20 / 50
By cascading two DMAs ____ bits can be transferred.
21 / 50
The interval timer can operate in _______ modes.
22 / 50
------------ is used to set time from RTC
23 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
24 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
25 / 50
BIOS DO NOT support ______.
26 / 50
The interval timer can operate in ____modes.
27 / 50
The output on the monitor is controlled by a controller called __________within the PC.
28 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
29 / 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);
30 / 50
Maximum number of interrupts in a standard PC is
31 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
32 / 50
Keyboard uses port ____ as status port.
33 / 50
Hardware Interrupts are __________.
34 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
35 / 50
Control information in files is maintained using
36 / 50
Communication between keyboard and keyboard controller is __________.
37 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
38 / 50
File system used in CD’s is_______ file system
39 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
40 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
41 / 50
There are two main types of interrupts namely _________________.
42 / 50
In self test mode the output of the UART is routed to its input.
43 / 50
Keyboard Status Byte is located at the address
44 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
45 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
46 / 50
Standard PC operates in two modes in terms of memory which are
47 / 50
The BIOS interrupt ________ can be used to configure RTC.
48 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
49 / 50
PPI stands for _____________.
50 / 50
Operating system name contains ____ bytes in boot block.
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