CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

Counter register can be used to divide clock signal.

2 / 50

The bit number _______ of the coprocessor control word is the interrupt enable flag.

3 / 50

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

4 / 50

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

5 / 50

Which port is known as Data Port______

6 / 50

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

7 / 50

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

8 / 50

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

9 / 50

Keyboard uses port ____ as status port.

10 / 50

PPI stands for

11 / 50

A software interrupt does not require EOI (End of interrupt).

12 / 50

Int 14H______ can be used to set the line parameter of the UART or COM port

13 / 50

Hardware Interrupts are __________.

14 / 50

Interrupt ______ is used to get or set the time.

15 / 50

Only ________ ports are important from programming point of view.

16 / 50

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

17 / 50

The interval timer can operate in ____modes.

18 / 50

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

19 / 50

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

20 / 50

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

21 / 50

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

22 / 50

The output on the monitor is controlled by a controller called __________within the PC.

23 / 50

There are __________ kinds of serial communication.

24 / 50

REGS is a Union

25 / 50

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

26 / 50

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

27 / 50

_______ is LED control byte.

28 / 50

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

29 / 50

Control information in files is maintained using

30 / 50

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

31 / 50

DCE stands for __________.

32 / 50

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

33 / 50

NMI Stand for

34 / 50

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

35 / 50

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

36 / 50

Display device (Monitor) performs _________ I/O.

37 / 50

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

38 / 50

_________ is used to identify the cause of interrupt.

39 / 50

LPTs can be swapped.

40 / 50

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

41 / 50

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

42 / 50

Which of the following are types of ISR __________.

43 / 50

The interval timer can operate in ____modes.

44 / 50

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

45 / 50

PPI is used to perform parallel communication

46 / 50

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

47 / 50

______ is LED control byte.

48 / 50

Keyboard Status Byte is located at the address

49 / 50

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

50 / 50

Int 14H______ can be used to set the line parameter of the UART or COM port

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