CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

Int 14H______ can be used to set the line parameter of the UART or COM port

2 / 50

In case of synchronous communication a timing signal is required to identify the start and end of a bit.

3 / 50

Communication between keyboard and keyboard controller is __________.

4 / 50

Int 14H __________ can be used to set the line parameter of the UART or COM port.

5 / 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);

6 / 50

____ No. of bytes are used to store the character in the keyboard buffer.

7 / 50

What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?

8 / 50

PPI stands for

9 / 50

UART stands for_______

10 / 50

The PPI acts as an interface between the CPU and a parallel ________ .

11 / 50

The output on the monitor is controlled by a controller called __________within the PC.

12 / 50

By cascading two DMAs ____ bits can be transferred.

13 / 50

______ is LED control byte.

14 / 50

________ is a device incorporated into the PC to update time even if the computer is off.

15 / 50

_______ is LED control byte.

16 / 50

The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.

17 / 50

------------ is used to read date from RTC

18 / 50

The interval timer can operate in ____modes.

19 / 50

Int ________ is used to control the printer via the BIOS.

20 / 50

In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.

21 / 50

Timer interrupt occurs _______ times every second by means of hardware.

22 / 50

The keyboard makes use of interrupt number _______ for its input operations.

23 / 50

If we use keep (0, 1000) in a TSR program, the memory allocated to it is

24 / 50

File can be______ viewed as collection of clusters or blocks.

25 / 50

Interrupt 9 usually reads the _________ from keyboard.

26 / 50

Interrupt _____ is empty; we can use its vector as a flag.

27 / 50

There are two type of communication synchronous and Anti Synchronous

28 / 50

In self test mode the output of the UART is routed to its input.

29 / 50

DMA stands for_________

30 / 50

BIOS DO NOT support ______.

31 / 50

DTE is ____________.

32 / 50

Bit number _______ of coprocessor control word is the Interrupt Enable Flag.

33 / 50

IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.

34 / 50

In case of synchronous communication a timing signal is required to identify the start and end of a bit.

35 / 50

The Function of I/O controller is to provide ____________.

36 / 50

To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.

37 / 50

A software interrupt does not require EOI (End of interrupt).

38 / 50

Interrupt service number is usually placed in ____________ register.

39 / 50

LPTs can be swapped.

40 / 50

The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .

41 / 50

Keyboard uses port ____ as status port.

42 / 50

The ____________ function simply enables the self test facility within the modem control register

43 / 50

Following is not a method of I/O

44 / 50

__________is used to control the printer via the BIOS

45 / 50

If CPUID instruction is not present then the processor can be a

46 / 50

The bit number _______ of the coprocessor control word is the interrupt enable flag.

47 / 50

The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).

48 / 50

An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.

49 / 50

There are __________ kinds of serial communication.

50 / 50

Software based flow control make use of -------- control characters

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