CS609 Midterm Online Quiz

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CS609-Midterm

1 / 50

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

2 / 50

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

3 / 50

The interval timer can operate in _______ modes.

4 / 50

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

5 / 50

To access the block within cluster using BIOS services the cluster number should be converted into _____.

6 / 50

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

7 / 50

File system used in CD’s is_______ file system

8 / 50

DCE stands for __________.

9 / 50

The service number is usually placed in the ________ register.

10 / 50

Display device (Monitor) performs _________ I/O.

11 / 50

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

12 / 50

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

13 / 50

Maximum number of interrupts in a standard PC is

14 / 50

__________is used to control the printer via the BIOS

15 / 50

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

16 / 50

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

17 / 50

______ is Disk interrupt.

18 / 50

PPI is used to perform parallel communication

19 / 50

BIOS DO NOT support ______.

20 / 50

The interval timer can operate in ____modes.

21 / 50

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

22 / 50

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

23 / 50

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

24 / 50

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

25 / 50

_________ is used to identify the cause of interrupt.

26 / 50

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

27 / 50

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

28 / 50

______ is used to set time.

29 / 50

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

30 / 50

By cascading two DMAs ____ bits can be transferred.

31 / 50

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

32 / 50

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

33 / 50

Interrupt service number is usually placed in ____________ register.

34 / 50

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

35 / 50

------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication

36 / 50

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

37 / 50

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

38 / 50

____ No. of bytes are used to store the character in the keyboard buffer.

39 / 50

Each paragraph in keep function is ____ bytes in size.

40 / 50

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

41 / 50

File system used in CD’s is_______ file system

42 / 50

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

43 / 50

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

44 / 50

Which port is known as Data Port______

45 / 50

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

46 / 50

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

47 / 50

Command register is an _____ bit register

48 / 50

DTE is ____________.

49 / 50

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

50 / 50

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

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