CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

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

2 / 50

______ is Disk interrupt.

3 / 50

BIOS support _____________UARTS as COM ports.

4 / 50

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

5 / 50

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

6 / 50

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

7 / 50

Hardware Interrupts are __________.

8 / 50

DSR stands for __________ .

9 / 50

DMA stands for_________

10 / 50

Register can be used to divide frequency is _________

11 / 50

___________ is used to identify cause of interrupt.

12 / 50

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

13 / 50

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

14 / 50

Only ________ ports are important from programming point of view.

15 / 50

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

16 / 50

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

17 / 50

To access the block within cluster using BIOS services the cluster number should be converted into _____.

18 / 50

The keyboard input character scan code is received at ___ port.

19 / 50

In ____________each byte is needed to be encapsulated in start and end.

20 / 50

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

21 / 50

Display device (Monitor) performs _________ I/O.

22 / 50

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

23 / 50

Tail of keyboard should get to get the start of buffer.

24 / 50

Maximum number of interrupts in a standard PC is

25 / 50

BPB stands for _________.

26 / 50

There are two type of communication synchronous and Anti Synchronous

27 / 50

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

28 / 50

DTE is ___________

29 / 50

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

30 / 50

PPI stands for _____________.

31 / 50

______ is LED control byte.

32 / 50

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

33 / 50

Keyboard Status Byte is located at the address

34 / 50

File system used in CD’s is_______ file system

35 / 50

The ______ service # is not used in any interrupt.

36 / 50

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

37 / 50

Standard PC operates in two modes in terms of memory which are

38 / 50

REGS is a Union

39 / 50

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

40 / 50

Operating system name contains ____ bytes in boot block.

41 / 50

There are two main types of interrupts, namely

42 / 50

Timer interrupt is a _________.

43 / 50

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

44 / 50

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

45 / 50

The interval timer can operate in ____modes.

46 / 50

On the execution of IRET instruction, number of bytes popped from stack is

47 / 50

Keyboard uses port ____ as status port.

48 / 50

LPTs can be swapped.

49 / 50

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

50 / 50

DCE is _____________

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