CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

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

2 / 50

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

3 / 50

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

4 / 50

The service _________ is called the keyboard hook service.

5 / 50

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

6 / 50

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

7 / 50

Which of the following are types of ISR __________.

8 / 50

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

9 / 50

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

10 / 50

File system used in CD’s is_______ file system

11 / 50

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

12 / 50

The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .

13 / 50

BIOS DO NOT support ______.

14 / 50

By cascading two DMAs ____ bits can be transferred.

15 / 50

BIOS support _____________UARTS as COM ports.

16 / 50

File system used in CD’s is_______ file system

17 / 50

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

18 / 50

______ is Disk interrupt.

19 / 50

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

20 / 50

DCE is _____________

21 / 50

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

22 / 50

Interrupt service number is usually placed in ____________ register.

23 / 50

There are two main types of interrupts, namely

24 / 50

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

25 / 50

Interrupt Vector Table (IVT) in short is a _______ bytes sized table.

26 / 50

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

27 / 50

There are two main types of interrupts namely _________________.

28 / 50

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

29 / 50

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

30 / 50

The BIOS interrupt ________ can be used to configure RTC.

31 / 50

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

32 / 50

UART stands for_______

33 / 50

If CPUID instruction is not present then the processor can be a

34 / 50

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

35 / 50

To distinguish 486 with Pentium CPUID Test is used.

36 / 50

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

37 / 50

DCE stands for __________.

38 / 50

Only ________ ports are important from programming point of view.

39 / 50

PPI stands for

40 / 50

Maximum number of interrupts in a standard PC is

41 / 50

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

42 / 50

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

43 / 50

____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.

44 / 50

Communication between keyboard and keyboard controller is __________.

45 / 50

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

46 / 50

The service number is usually placed in the ________ register.

47 / 50

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

48 / 50

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

49 / 50

Keyboard Status Byte is located at the address

50 / 50

Keyboard uses port ____ as status port.

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