CS609-Midterm
1 / 50
_________ is used to identify the cause of interrupt.
2 / 50
There are two main types of interrupts, namely
3 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
4 / 50
The Function of I/O controller is to provide ____________.
5 / 50
The interval timer can operate in _______ modes.
6 / 50
Register can be used to divide frequency is _________
7 / 50
The keyboard makes use of interrupt number _______ for its input operations.
8 / 50
BIOS DO NOT support ______.
9 / 50
_____ bit is cleared to indicate the low nibble is being sent.
10 / 50
By cascading two DMAs ____ bits can be transferred.
11 / 50
UART stands for_______
12 / 50
In self test mode the output of the UART is routed to its input.
13 / 50
________means typematic rate will be sent in next byte.
14 / 50
Maximum number of interrupts in a standard PC is
15 / 50
The service _________ is called the keyboard hook service.
16 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
17 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
18 / 50
The ____________ function simply enables the self test facility within the modem control register
19 / 50
Following is not a method of I/O
20 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
21 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
22 / 50
Standard PC operates in two modes in terms of memory which are
23 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
24 / 50
Each paragraph in keep function is ____ bytes in size.
25 / 50
------------ is used to read time from RTC
26 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
27 / 50
In ____________each byte is needed to be encapsulated in start and end.
28 / 50
Timer interrupt is a _________.
29 / 50
______ is Disk interrupt.
30 / 50
DCE is _____________
31 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
32 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
33 / 50
__________is used to control the printer via the BIOS
34 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
35 / 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);
36 / 50
Interrupt service number is usually placed in ____________ register.
37 / 50
File system used in CD’s is_______ file system
38 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
39 / 50
Counter register can be used to divide clock signal.
40 / 50
PPI is used to perform parallel communication
41 / 50
The BIOS interrupt ________ can be used to configure RTC.
42 / 50
Software based flow control make use of -------- control characters
43 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
44 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
45 / 50
DTE is ____________.
46 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
47 / 50
48 / 50
The service number is usually placed in the ________ register.
49 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
50 / 50
Operating system name contains ____ bytes in boot block.
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