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In NTFS, FAT and root directory has been replaced by ________.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