CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

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

2 / 50

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

3 / 50

Communication between keyboard and keyboard controller is __________.

4 / 50

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

5 / 50

______ is LED control byte.

6 / 50

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

7 / 50

Interrupt 9 usually reads the _________ from keyboard.

8 / 50

BIOS DO NOT support ______.

9 / 50

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

10 / 50

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

11 / 50

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

12 / 50

PPI is used to perform parallel communication

13 / 50

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

14 / 50

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

15 / 50

Operating system name contains ____ bytes in boot block.

16 / 50

Interrupt service number is usually placed in ____________ register.

17 / 50

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

18 / 50

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

19 / 50

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

20 / 50

DSR stands for __________ .

21 / 50

The BIOS interrupt ________ can be used to configure RTC.

22 / 50

There are two type of communication synchronous and Anti Synchronous

23 / 50

The ______ service # is not used in any interrupt.

24 / 50

To distinguish 486 with Pentium CPUID Test is used.

25 / 50

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

26 / 50

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

27 / 50

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

28 / 50

The interval timer can operate in _______ modes.

29 / 50

Command register is an _____ bit register

30 / 50

In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles

31 / 50

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

32 / 50

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

33 / 50

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

34 / 50

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

35 / 50

UART stands for_______

36 / 50

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

37 / 50

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

38 / 50

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

39 / 50

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

40 / 50

_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.

41 / 50

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

42 / 50

There are two main types of interrupts namely _________________.

43 / 50

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

44 / 50

Counter register can be used to divide clock signal.

45 / 50

The service _________ is called the keyboard hook service.

46 / 50

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

47 / 50

File system used in CD’s is_______ file system

48 / 50

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

49 / 50

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

50 / 50

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

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