Multiple Choice Questions (MCQs)
If the following function, keep(1, 1000); is called in the TSR program, it means that ________ No. of bytes are reserved in the memory.
The service _________ is called the keyboard hook service.
______ is Disk interrupt.
Control information about files is maintained using ______.
When LSN is equal to zero (0), it means ________.
If FAT entry is between FFF0H to FFF6H in FAT16 then _________.
Only _______ ports are important from programming point of view.
DTE is _________.
Total No. of bytes that can be stored in Keyboard Buffer is_________.
A cluster is same as block.
Int 14H __________ can be used to set the line parameter of the UART or COM port.
Int ________ is used to control the printer via the BIOS.
In DOS we have limit of _______ blocks per cluster.
When we mark a file as deleted by placing 0xE5 then the chain of clusters in FAT is also replaced by ________.
Counter register can be used to divide clock signal.
Int 14H __________ can be used to send a byte.
DOS has a built in limit of ________ blocks per cluster.
What will happen if NTFS volume is accessed in DOS?
If we want to send printing on the printer then we have to perform following steps.
File can be _______ viewed as organization of data.
_______ is used to program various common parameters of transfer for all the channels.
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
The _________ function initializes COM port whose number is passed as a parameter using BIOS services.
If we want to produce the shrill voice from the speaker phone then we have to load the _________ divisor value at Port _________.
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
Cluster number can also be referred as block number.
The Function of I/O controller is to provide ________.
The ______ service # is not used in any interrupt.
Software based flow control make use of _________control characters
The size of each entry in FCB of FAT12 and FAT16 file systems is:
DCE is ___________.
DMA may not support memory to memory transfer
BIOS support _________UARTS as COM ports.
XON whenever received indicates the start of communication and XOFF whenever received indicates a temporary pause in the communication.
______ is the first block on disk
The _________ function uses the COM port number to receive a byte from the COM port using BIOS services.
If we know the cluster number, we can access the blocks within the cluster using BIOS services directly.
Standard PC operates in two modes in terms of memory which are
_______ is a collection of contagious blocks.
_______ is used to identify the cause of interrupt.
The memory addresses of COM ports remain same for all computers.
The output on the monitor is controlled by a controller called __________ within the PC.
If printer is __________ then printer sends back the ACK signal to the printer interface.
If NTFS volume is accessed in DOS then what will happen?
The keyboard makes use of interrupt number ________ for its input operations.
The BIOS interrupt ________ can be used to configure RTC.
BPB stands for ________.
In FAT32, lower _______ bits are used.
File is ________ viewed as an organization of data physically it can be collection of clusters or blocks.
DSR stands for _________.
In NTFS, FAT and root directory has been replaced by ________.
We can access the contents of File by using the root directory entry and ________.
In FAT12, to calculate the address or offset from index, we need to multiply it with ________.
Total number of clusters of FAT12 are ________.
The baud rate is set in accordance with the divisor value loaded within the UART internal registers base +0 and base +1.
________ No. of bytes are used to store the character in the key board buffer.
The __________ function simply enables the self test facility within the modem control register.
Drive paramrter block is derived from ________.
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
______whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
What will be the value of the word located at 1Fh in DPB when number of free clusters on drive is not known?
Int _________ service 0 can be used to set the line parameter of the URT or COM port.
There are two types of communication; synchronous and anti synchronous
The accumulative time that is required to access the selected block is called ________.
There are ________ kinds of serial communication.
To store a cluster in FAT32 ________ is/are needed.
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);
________ is used to read time from RTC.
Which of the following register is used, if you want to block access of any Hardware.
______ is used to read a block against its LSN.
In _______ each byte is needed to be encapsulated in start and end.
Each partition information chunk is 16 bytes long and the last two bytes at the end of the partition table data part is the partition table signature whose value should be_______indicating that the code part contains valid executable code.
Boot sector is the ________ logical sector of NTFS partition.
DOS has practically limit of _________ blocks per cluster.
There are two main types of interrupts, namely
______ structure is a tree like structure.
LSN of FSInfo block is available at _____.
Size of FS Info block is _______.
At IRQ7 Interrupt # __________ is used.
In order to produce the sound from PC internal Speaker we have to load the _________ bit divisor value at the _________ port.
_______ is a device incorporated into the PC to update time even if the computer is off.
The service number is usually placed in the ________ register.
_______ store the base address for LPT1.
NTFS volume can be accessed directly in DOS.
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