CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

There are two main types of interrupts, namely

2 / 50

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

3 / 50

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

4 / 50

In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.

5 / 50

File system used in CD’s is_______ file system

6 / 50

Standard PC can have _____ PPI.

7 / 50

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

8 / 50

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

9 / 50

Communication between keyboard and keyboard controller is __________.

10 / 50

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

11 / 50

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

12 / 50

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

13 / 50

There are two main types of interrupts namely _________________.

14 / 50

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

15 / 50

DTE is ____________.

16 / 50

PPI stands for _____________.

17 / 50

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

18 / 50

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

19 / 50

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

20 / 50

Keyboard uses port ____ as status port.

21 / 50

Maximum number of interrupts in a standard PC is

22 / 50

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

23 / 50

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

24 / 50

The ______ service # is not used in any interrupt.

25 / 50

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

26 / 50

LPTs can be swapped.

27 / 50

PPI interconnection _______ bits is cleared to indicate low nibble is being sent.

28 / 50

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

29 / 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);

30 / 50

Register can be used to divide frequency is _________

31 / 50

By cascading two DMAs ____ bits can be transferred.

32 / 50

File system used in CD’s is_______ file system

33 / 50

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

34 / 50

There are __________ kinds of serial communication.

35 / 50

DCE is _____________

36 / 50

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

37 / 50

Command register is an _____ bit register

38 / 50

The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.

39 / 50

______ is Disk interrupt.

40 / 50

Maximum number of interrupts in a standard PC is

41 / 50

Operating system name contains ____ bytes in boot block.

42 / 50

There are two type of communication synchronous and Anti Synchronous

43 / 50

REGS is a Union

44 / 50

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

45 / 50

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

46 / 50

Which port is known as Data Port______

47 / 50

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

48 / 50

DTE is ___________

49 / 50

Interrupt 9 usually reads the _________ from keyboard.

50 / 50

_________ is used to identify the cause of interrupt.

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