CS609 Midterm Online Quiz

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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

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

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

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

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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