CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

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

2 / 50

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

3 / 50

Keyboard Status Byte is located at the address

4 / 50

DCE is _____________

5 / 50

DTE is ____________.

6 / 50

_______ is LED control byte.

7 / 50

___________ is used to identify cause of interrupt.

8 / 50

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

9 / 50

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

10 / 50

_________ is used to identify the cause of interrupt.

11 / 50

Counter register can be used to divide clock signal.

12 / 50

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

13 / 50

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

14 / 50

UART stands for_______

15 / 50

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

16 / 50

______ is LED control byte.

17 / 50

Standard PC can have _____ PPI.

18 / 50

------------ is used to set time from RTC

19 / 50

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

20 / 50

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

21 / 50

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

22 / 50

Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.

23 / 50

DSR stands for __________ .

24 / 50

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

25 / 50

PPI stands for

26 / 50

Operating system name contains ____ bytes in boot block.

27 / 50

______ is Disk interrupt.

28 / 50

Display device (Monitor) performs _________ I/O.

29 / 50

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

30 / 50

Keyboard uses port ____ as status port.

31 / 50

Each paragraph in keep function is ____ bytes in size.

32 / 50

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

33 / 50

Maximum number of interrupts in a standard PC is

34 / 50

REGS is a Union

35 / 50

If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.

36 / 50

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

37 / 50

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

38 / 50

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

39 / 50

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

40 / 50

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

41 / 50

To distinguish 486 with Pentium CPUID Test is used.

42 / 50

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

43 / 50

File can be______ viewed as collection of clusters or blocks.

44 / 50

To store each character in keyboard buffer ____ bytes are required.

45 / 50

File system used in CD’s is_______ file system

46 / 50

Interrupt 9 usually reads the _________ from keyboard.

47 / 50

______ is used to set time.

48 / 50

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

49 / 50

Which of the following are types of ISR __________.

50 / 50

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

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