CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

Following is not a method of I/O

2 / 50

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

3 / 50

The ________function initialize the COM port whose number is passed as parameter using BIOS services.

4 / 50

BIOS DO NOT support ______.

5 / 50

The________ function uses the COM port number to receive a byte from the COM port using BIOS services.

6 / 50

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

7 / 50

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

8 / 50

DCE is _____________

9 / 50

BPB stands for _________.

10 / 50

At IRQ 7 Interrupt # ___ is used.

11 / 50

File system used in CD’s is_______ file system

12 / 50

A single interrupt controller can arbitrate among ____ different devices.

13 / 50

If keyboard buffer is empty the head and tail points at the same location.

14 / 50

Set the Interrupt vector means to change the double word sized interrupt vector within IVT.

15 / 50

Keyboard uses port ____ as status port.

16 / 50

Each paragraph in keep function is ____ bytes in size.

17 / 50

REGS is a Union

18 / 50

Interrupt 9 usually reads the _________ from keyboard.

19 / 50

The ______ service # is not used in any interrupt.

20 / 50

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

21 / 50

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

22 / 50

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

23 / 50

DSR stands for __________ .

24 / 50

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

25 / 50

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

26 / 50

Int_____________ service 0 can be used to set the line parameter of the UART or COM port.

27 / 50

Which port is known as Data Port______

28 / 50

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

29 / 50

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

30 / 50

Interrupt Vector Table (IVT) in short is a _______ bytes sized table.

31 / 50

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

32 / 50

_____ bit is cleared to indicate the low nibble is being sent.

33 / 50

Int 14H __________ can be used to receive a byte.

34 / 50

LPTs can be swapped.

35 / 50

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

36 / 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);

37 / 50

We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.

38 / 50

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

39 / 50

_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.

40 / 50

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

41 / 50

DTE is ___________

42 / 50

Register can be used to divide frequency is _________

43 / 50

____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.

44 / 50

By cascading two DMAs ____ bits can be transferred.

45 / 50

In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles

46 / 50

Timer interrupt is a _________.

47 / 50

Display device (Monitor) performs _________ I/O.

48 / 50

The service _________ is called the keyboard hook service.

49 / 50

The interval timer can operate in ____modes.

50 / 50

There are __________ kinds of serial communication.

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