In the name of ALLAH, the most beneficient, the most merciful

System Programming (CS609)

Multiple Choice Questions (MCQs)

Objective Questions

  1. The memory addresses of COM ports remain same for all computers.

    1. True
    2. False
  2. There are ________ kinds of serial communication.

    1. 2
    2. 3
    3. 4
    4. 5
  3. To store a cluster in FAT32 ________ is/are needed.

    1. Nibble
    2. Byte
    3. 2 Bytes
    4. 4 Bytes
  4. At IRQ7 Interrupt # __________ is used.

    1. 0x0A
    2. 0x0B
    3. 0x0C
    4. x0F
  5. When LSN is equal to zero (0), it means ________.

    1. First block of the disk
    2. First block of the logical drive
    3. First block of hidden blocks
    4. None of the given
  6. Int _________ service 0 can be used to set the line parameter of the URT or COM port.

    1. 14H
    2. 15H
    3. 13H
    4. None of the given
  7. A cluster is same as block.

    1. True
    2. False
  8. Control information about files is maintained using ______.

    1. BPB
    2. DPB
    3. FCB
    4. FPB
  9. The keyboard makes use of interrupt number ________ for its input operations.

    1. 9
    2. 10
    3. 11
    4. 12
  10. In _______ each byte is needed to be encapsulated in start and end.

    1. Synchronous communication
    2. Asynchronous communication
    3. Both of Synchronous & Asynchronous Communication
    4. None of the given
  11. DMA may not support memory to memory transfer

    1. True
    2. False
  12. The Function of I/O controller is to provide ________.

    1. I/O control signals
    2. Buffering
    3. Error Correction and Detection
    4. All of given
  13. _______ is a collection of contagious blocks.

    1. Cluster
    2. Disk
    3. Track
    4. Platter
  14. Software based flow control make use of _________control characters

    1. XON
    2. XOFF
    3. XON and XOFF
    4. None of the given
  15. The service _________ is called the keyboard hook service.

    1. 15H/2FH
    2. 15H/4FH
    3. 15H/FFH
    4. None of the given
  16. The amount of memory above conventional memory (extended memory) can be determined using the service _______.

    1. 15H/88H
    2. 16H/88H
    3. 17H/88H
    4. 21H/88H
  17. When we mark a file as deleted by placing 0xE5 then the chain of clusters in FAT is also replaced by ________.

    1. E5
    2. 1
    3. 0
    4. N
  18. The ______ service # is not used in any interrupt.

    1. 01
    2. 02
    3. 03
    4. FF
  19. DSR stands for _________.

    1. Data set ready
    2. Data service ready
    3. Data stock ready
    4. None of the given
  20. DTE is _________.

    1. Data terminal equipment
    2. Data transmitting equipment
    3. Dual terminal equipment
    4. None of the given
  21. In case of synchronous communication a timing signal is required to identify the start and end of a bit.

    1. True
    2. False
  22. ______whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.

    1. XON & XOFF
    2. XOFF & XON
    3. XON & YOFF
    4. YON & XOFF
  23. ______ is the first block on disk

    1. LBA=2 block
    2. LBA=0 block
    3. LBA=1 block
    4. None of the given
  24. ______ structure is a tree like structure.

    1. DOS Directory
    2. Disk
    3. Sector
    4. None of the given
  25. DOS has a built in limit of ________ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256
  26. Int 14H __________ can be used to send a byte.

    1. Service # 0
    2. Service # 1
    3. Service # 2
    4. None of the given
  27. File can be _______ viewed as organization of data.

    1. Physically
    2. Logically
    3. Both logically and physically
    4. None of the given
  28. NTFS volume can be accessed directly in DOS.

    1. True
    2. False
  29. ________ No. of bytes are used to store the character in the key board buffer.

    1. 1
    2. 2
    3. 4
    4. 8
  30. The accumulative time that is required to access the selected block is called ________.

    1. Access time
  31. ______ is used to read a block against its LSN.

    1. absread( )
    2. abswrite( )
    3. lsnread( )
    4. None of the given
  32. Int ________ is used to control the printer via the BIOS.

    1. 17H
    2. 18H
    3. 20H
    4. 21H
  33. In order to produce the sound from PC internal Speaker we have to load the _________ bit divisor value at the _________ port.

    1. 8, 0x21
    2. 16, 0x42
    3. 32, 0x22
    4. 64, 0x32
  34. DCE is ___________.

    1. Data communication equipment
    2. Dual communication equipment
    3. Data clearing equipment
    4. None of the given
  35. If we want to produce the shrill voice from the speaker phone then we have to load the _________ divisor value at Port _________.

    1. high, 0x42
    2. low, 0x42
    3. high, 0x22
    4. low, 0x22
  36. There are two types of communication; synchronous and anti synchronous

    1. True
    2. False
  37. Which of the following register is used, if you want to block access of any Hardware.

    1. ISR
    2. IMR
    3. IRR
    4. None of the given
  38. _______ is used to identify the cause of interrupt.

    1. Interrupt Enable Register
    2. Interrupt ID register
    3. Interrupt Status register
    4. None of the given
  39. If we want to send printing on the printer then we have to perform following steps.

    1. Initialize printer
    2. Read Status
    3. Check Error
    4. All of the given
  40. _______ is used to program various common parameters of transfer for all the channels.

    1. DMA Command Register
    2. DMA Request Register
    3. DMA Status Register
    4. DMA Mode Register
  41. To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.

    1. True
    2. False
  42. Only _______ ports are important from programming point of view.

    1. 70 and 71H
    2. 71 and 72H
    3. 70 and 72H
    4. 72 and 73H
  43. 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.

    1. AA55
    2. AA66
    3. BB66
    4. CC55
  44. ________ is used to read time from RTC.

    1. 1A/02H
    2. 1A/03H
    3. 1A/04H
    4. 1A/05H
  45. The output on the monitor is controlled by a controller called __________ within the PC.

    1. Video controller
    2. Bus controller
    3. Ram controller
    4. None of the given
  46. Drive paramrter block is derived from ________.

    1. FCB
    2. FAT
    3. BPB
    4. CPB
  47. IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.

    1. 2
    2. 4
    3. 8
    4. 16
  48. ______ is Disk interrupt.

    1. 10H
    2. 11H
    3. 13H
    4. 14H
  49. If the following function, keep(1, 1000); is called in the TSR program, it means that ________ No. of bytes are reserved in the memory.

    1. 8000
    2. 16000
    3. 32000
    4. 64000
  50. In FAT32, lower _______ bits are used.

    1. 48 bits
    2. 36 bits
    3. 28 bits
    4. 32 bits
  51. What will happen if NTFS volume is accessed in DOS?

    1. Convert it to FAT volume
    2. Nothing will happen
    3. Error of invalid media
    4. None of the given
  52. File is ________ viewed as an organization of data physically it can be collection of clusters or blocks.

    1. logically
    2. physically
  53. In FAT12, to calculate the address or offset from index, we need to multiply it with ________.

    1. 5/3
    2. 3/2
    3. 5/2
    4. 3
  54. The __________ function simply enables the self test facility within the modem control register.

    1. STOn()
    2. SelfTest()
    3. SelfTestOn()
    4. None of the given
  55. XON whenever received indicates the start of communication and XOFF whenever received indicates a temporary pause in the communication.

    1. True
    2. False
  56. Size of FS Info block is _______.

    1. 64 bytes
    2. 128 bytes
    3. 256 bytes
    4. 512 bytes
  57. _______ store the base address for LPT1.

    1. 40:00H
    2. 40:02H
    3. 40:08H
    4. 40:1AH
  58. The baud rate is set in accordance with the divisor value loaded within the UART internal registers base +0 and base +1.

    1. True
    2. False
  59. Total No. of bytes that can be stored in Keyboard Buffer is_________.

    1. 16
    2. 32
    3. 64
    4. 128
  60. _______ is a device incorporated into the PC to update time even if the computer is off.

    1. Clock counter
    2. ROM
    3. Clock
    4. Real time clock
  61. In NTFS, FAT and root directory has been replaced by ________.

    1. JFT
    2. MFT
    3. TFT
    4. SFT
  62. If NTFS volume is accessed in DOS then what will happen?

    1. It will fire error of invalid media.
    2. It will fire error of invalid file.
    3. It will fire error of invalid section.
    4. None of the given
  63. BPB stands for ________.

    1. BIOS parameter block
    2. BIOS processing block
    3. Base processing block
    4. BIOS partition block
  64. DOS has practically limit of _________ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256
  65. If printer is __________ then printer sends back the ACK signal to the printer interface.

    1. idle
    2. busy
    3. out of paper
    4. None of the given
  66. The service number is usually placed in the ________ register.

    1. AL
    2. CL
    3. AH
    4. AX
  67. When LSN is equal to zero (0), it means ________.

    1. LSN is relative address with respect to the start of Logical
  68. File is ________ viewed as an organization of data physically it can be collection of clusters or blocks.

    1. logically
    2. physically
    3. conceptually
    4. None of the given
  69. If we know the cluster number, we can access the blocks within the cluster using BIOS services directly.

    1. True
    2. False
  70. If FAT entry is between FFF0H to FFF6H in FAT16 then _________.

    1. Cluster is available
    2. It is a Reserved cluster
    3. It is next file cluster
    4. It is a last file cluster
  71. Boot sector is the ________ logical sector of NTFS partition.

    1. First
    2. Second
    3. Third
    4. Fourth
  72. Cluster number can also be referred as block number.

    1. True
    2. False
  73. The BIOS interrupt ________ can be used to configure RTC.

    1. 1AH
    2. 2AH
    3. 3AH
    4. 4AH
  74. The _________ function uses the COM port number to receive a byte from the COM port using BIOS services.

    1. initialize()
    2. recievebyte()
    3. recieve()
    4. recievechar()
  75. There are two main types of interrupts, namely

    1. PC based and Window based
    2. Hardware based and Kernal based
    3. Hardware interrupts and Software interrupts
    4. None of the given
  76. Counter register can be used to divide clock signal.

    1. True
    2. False
  77. What will be the value of the word located at 1Fh in DPB when number of free clusters on drive is not known?

    1. 0000H
    2. 1111H
    3. FFFFH
    4. None of the given
  78. The _________ function initializes COM port whose number is passed as a parameter using BIOS services.

    1. initializecom()
    2. initialize()
    3. recievechar()
    4. None of the given
  79. 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);

    1. if (((*scr)&12)==12)
    2. if (((*scr)&8)==8)
    3. if (((*scr)&4)==4)
    4. if (((*scr)&2)==2)
  80. Standard PC operates in two modes in terms of memory which are

    1. Real mode and Extended Mode
    2. Base mode and Memory Mode
    3. Real mode and protected mode
    4. None of the given
  81. LSN of FSInfo block is available at _____.

    1. BPB
    2. FAT
    3. Root directory
    4. None of the given
  82. In DOS we have limit of _______ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256
  83. BIOS support _________UARTS as COM ports.

    1. 6
    2. 4
    3. 3
    4. 2
  84. Int 14H __________ can be used to set the line parameter of the UART or COM port.

    1. Service # 0
    2. Service # 1
    3. Service # 2
    4. None of the given
  85. We can access the contents of File by using the root directory entry and ________.

    1. Reserved Blocks
    2. Number of FAT copies
    3. File Allocation Table (FAT)
    4. None of the given
  86. The size of each entry in FCB of FAT12 and FAT16 file systems is:

    1. Nibble
    2. Byte
    3. 2 Bytes
    4. 4 Bytes
  87. Total number of clusters of FAT12 are ________.

    1. FF0 H
    2. FFF H
    3. FEF H
    4. FEE H