CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

_________ is used to identify the cause of interrupt.

2 / 50

There are two main types of interrupts, namely

3 / 50

The following command “outportb (0x61,inportb(0x61) & 0xFC);” will

4 / 50

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

5 / 50

The interval timer can operate in _______ modes.

6 / 50

Register can be used to divide frequency is _________

7 / 50

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

8 / 50

BIOS DO NOT support ______.

9 / 50

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

10 / 50

By cascading two DMAs ____ bits can be transferred.

11 / 50

UART stands for_______

12 / 50

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

13 / 50

________means typematic rate will be sent in next byte.

14 / 50

Maximum number of interrupts in a standard PC is

15 / 50

The service _________ is called the keyboard hook service.

16 / 50

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

17 / 50

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

18 / 50

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

19 / 50

Following is not a method of I/O

20 / 50

The amount of memory above conventional memory (extended memory) can be determined using the service _______.

21 / 50

If printer is _____ then printer sends back the ACK signal to the printer interface

22 / 50

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

23 / 50

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

24 / 50

Each paragraph in keep function is ____ bytes in size.

25 / 50

------------ is used to read time from RTC

26 / 50

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

27 / 50

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

28 / 50

Timer interrupt is a _________.

29 / 50

______ is Disk interrupt.

30 / 50

DCE is _____________

31 / 50

The -------- function receive a byte and COM port number is passed as parameter using BIOS service

32 / 50

Total No. of bytes that can be stored in Keyboard Buffer is____.

33 / 50

__________is used to control the printer via the BIOS

34 / 50

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

35 / 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);

36 / 50

Interrupt service number is usually placed in ____________ register.

37 / 50

File system used in CD’s is_______ file system

38 / 50

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

39 / 50

Counter register can be used to divide clock signal.

40 / 50

PPI is used to perform parallel communication

41 / 50

The BIOS interrupt ________ can be used to configure RTC.

42 / 50

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

43 / 50

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

44 / 50

The BIOS interrupt 0x1AH can be used to configure real time clock

45 / 50

DTE is ____________.

46 / 50

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

47 / 50

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

48 / 50

The service number is usually placed in the ________ register.

49 / 50

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

50 / 50

Operating system name contains ____ bytes in boot block.

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