CS609-Midterm
1 / 50
Control information in files is maintained using
2 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
3 / 50
The interval timer can operate in _______ modes.
4 / 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);
5 / 50
The service _________ is called the keyboard hook service.
6 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
7 / 50
File system used in CD’s is_______ file system
8 / 50
Timer interrupt is a _________.
9 / 50
Interrupt service number is usually placed in ____________ register.
10 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
11 / 50
_____ bit is cleared to indicate the low nibble is being sent.
12 / 50
Tail of keyboard should get to get the start of buffer.
13 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
14 / 50
DTE is ___________
15 / 50
Interrupt _____ is empty; we can use its vector as a flag.
16 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
17 / 50
Keyboard uses port ____ as status port.
18 / 50
The ______ service # is not used in any interrupt.
19 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
20 / 50
BPB stands for _________.
21 / 50
DSR stands for __________ .
22 / 50
In ____________each byte is needed to be encapsulated in start and end.
23 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
24 / 50
The output on the monitor is controlled by a controller called __________within the PC.
25 / 50
REGS is a Union
26 / 50
_______ is LED control byte.
27 / 50
Which of the following are types of ISR __________.
28 / 50
Communication between keyboard and keyboard controller is __________.
29 / 50
The service number is usually placed in the ________ register.
30 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
31 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
32 / 50
UART stands for_______
33 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
34 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
35 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
36 / 50
Operating system name contains ____ bytes in boot block.
37 / 50
___________ is used to identify cause of interrupt.
38 / 50
39 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
40 / 50
------------ is used to read date from RTC
41 / 50
Int ________ is used to control the printer via the BIOS.
42 / 50
On the execution of IRET instruction, number of bytes popped from stack is
43 / 50
There are two main types of interrupts namely _________________.
44 / 50
There are two main types of interrupts, namely
45 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
46 / 50
47 / 50
DCE stands for __________.
48 / 50
Int 14H____________ can be used to send a byte
49 / 50
__________is used to control the printer via the BIOS
50 / 50
Following is not a method of I/O
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