CS609-Midterm
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Maximum number of interrupts in a standard PC is
2 / 50
In ____________each byte is needed to be encapsulated in start and end.
3 / 50
The service _________ is called the keyboard hook service.
4 / 50
DCE is _____________
5 / 50
The interval timer can operate in ____modes.
6 / 50
Timer interrupt occurs _______ times every second by means of hardware.
7 / 50
_________ is used to identify the cause of interrupt.
8 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
9 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
10 / 50
Int 14H____________ can be used to send a byte
11 / 50
Display device (Monitor) performs _________ I/O.
12 / 50
DCE stands for __________.
13 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
14 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
15 / 50
PPI is used to perform parallel communication
16 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
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18 / 50
The Function of I/O controller is to provide ____________.
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The -------- function receive a byte and COM port number is passed as parameter using BIOS service
20 / 50
There are two main types of interrupts namely _________________.
21 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
22 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
23 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
24 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
25 / 50
The output on the monitor is controlled by a controller called __________within the PC.
26 / 50
Interrupt 9 usually reads the _________ from keyboard.
27 / 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);
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29 / 50
Software based flow control make use of -------- control characters
30 / 50
________means typematic rate will be sent in next byte.
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In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
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___________ is used to identify cause of interrupt.
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__________is used to control the printer via the BIOS
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The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
35 / 50
BIOS support _____________UARTS as COM ports.
36 / 50
Int ________ is used to control the printer via the BIOS.
37 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
38 / 50
Only ________ ports are important from programming point of view.
39 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
40 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
41 / 50
Timer interrupt is a _________.
42 / 50
DSR stands for __________ .
43 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
44 / 50
UART stands for_______
45 / 50
Which of the following are types of ISR __________.
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______ is Disk interrupt.
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File system used in CD’s is_______ file system
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Total No. of bytes that can be stored in Keyboard Buffer is____.
49 / 50
Hardware Interrupts are __________.
50 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
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