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

System Programming (CS609)

Multiple Choice Questions (MCQs)

Objective Questions

  1. XON whenever received indicates the start of communication and XOFF whenever received indicates a temporary pause in the communication.

    1. True
    2. False
  2. There are two types of communication; synchronous and anti synchronous

    1. True
    2. False
  3. _______ 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
  4. In DOS we have limit of _______ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256
  5. ________ No. of bytes are used to store the character in the key board buffer.

    1. 1
    2. 2
    3. 4
    4. 8
  6. 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
  7. The __________ function simply enables the self test facility within the modem control register.

    1. STOn()
    2. SelfTest()
    3. SelfTestOn()
    4. None of the given
  8. 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
  9. To store a cluster in FAT32 ________ is/are needed.

    1. Nibble
    2. Byte
    3. 2 Bytes
    4. 4 Bytes
  10. DMA may not support memory to memory transfer

    1. True
    2. False
  11. Cluster number can also be referred as block number.

    1. True
    2. False
  12. _______ store the base address for LPT1.

    1. 40:00H
    2. 40:02H
    3. 40:08H
    4. 40:1AH
  13. NTFS volume can be accessed directly in DOS.

    1. True
    2. False
  14. 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
  15. 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
  16. 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
  17. In case of synchronous communication a timing signal is required to identify the start and end of a bit.

    1. True
    2. False
  18. If we know the cluster number, we can access the blocks within the cluster using BIOS services directly.

    1. True
    2. False
  19. 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
  20. File is ________ viewed as an organization of data physically it can be collection of clusters or blocks.

    1. logically
    2. physically
  21. Counter register can be used to divide clock signal.

    1. True
    2. False
  22. _______ 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
  23. 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
  24. 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
  25. DCE is ___________.

    1. Data communication equipment
    2. Dual communication equipment
    3. Data clearing equipment
    4. None of the given
  26. 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
  27. 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
  28. BPB stands for ________.

    1. BIOS parameter block
    2. BIOS processing block
    3. Base processing block
    4. BIOS partition block
  29. 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
  30. In NTFS, FAT and root directory has been replaced by ________.

    1. JFT
    2. MFT
    3. TFT
    4. SFT
  31. The memory addresses of COM ports remain same for all computers.

    1. True
    2. False
  32. 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
  33. 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
  34. The service _________ is called the keyboard hook service.

    1. 15H/2FH
    2. 15H/4FH
    3. 15H/FFH
    4. None of the given
  35. _______ 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
  36. DOS has a built in limit of ________ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256
  37. 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)
  38. The size of each entry in FCB of FAT12 and FAT16 file systems is:

    1. Nibble
    2. Byte
    3. 2 Bytes
    4. 4 Bytes
  39. ______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
  40. 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
  41. Total number of clusters of FAT12 are ________.

    1. FF0 H
    2. FFF H
    3. FEF H
    4. FEE H
  42. When LSN is equal to zero (0), it means ________.

    1. LSN is relative address with respect to the start of Logical
  43. 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
  44. To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.

    1. True
    2. False
  45. 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
  46. Int 14H __________ can be used to send a byte.

    1. Service # 0
    2. Service # 1
    3. Service # 2
    4. None of the given
  47. ______ is Disk interrupt.

    1. 10H
    2. 11H
    3. 13H
    4. 14H
  48. 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
  49. 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
  50. 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()
  51. Int ________ is used to control the printer via the BIOS.

    1. 17H
    2. 18H
    3. 20H
    4. 21H
  52. The accumulative time that is required to access the selected block is called ________.

    1. Access time
  53. _______ is a collection of contagious blocks.

    1. Cluster
    2. Disk
    3. Track
    4. Platter
  54. 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
  55. DOS has practically limit of _________ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256
  56. At IRQ7 Interrupt # __________ is used.

    1. 0x0A
    2. 0x0B
    3. 0x0C
    4. x0F
  57. In FAT32, lower _______ bits are used.

    1. 48 bits
    2. 36 bits
    3. 28 bits
    4. 32 bits
  58. 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
  59. 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
  60. DSR stands for _________.

    1. Data set ready
    2. Data service ready
    3. Data stock ready
    4. None of the given
  61. ______ is the first block on disk

    1. LBA=2 block
    2. LBA=0 block
    3. LBA=1 block
    4. None of the given
  62. Software based flow control make use of _________control characters

    1. XON
    2. XOFF
    3. XON and XOFF
    4. None of the given
  63. Drive paramrter block is derived from ________.

    1. FCB
    2. FAT
    3. BPB
    4. CPB
  64. Boot sector is the ________ logical sector of NTFS partition.

    1. First
    2. Second
    3. Third
    4. Fourth
  65. The ______ service # is not used in any interrupt.

    1. 01
    2. 02
    3. 03
    4. FF
  66. There are ________ kinds of serial communication.

    1. 2
    2. 3
    3. 4
    4. 5
  67. 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
  68. Control information about files is maintained using ______.

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

    1. 9
    2. 10
    3. 11
    4. 12
  70. 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
  71. ______ is used to read a block against its LSN.

    1. absread( )
    2. abswrite( )
    3. lsnread( )
    4. None of the given
  72. ______ structure is a tree like structure.

    1. DOS Directory
    2. Disk
    3. Sector
    4. None of the given
  73. 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
  74. BIOS support _________UARTS as COM ports.

    1. 6
    2. 4
    3. 3
    4. 2
  75. 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
  76. The service number is usually placed in the ________ register.

    1. AL
    2. CL
    3. AH
    4. AX
  77. LSN of FSInfo block is available at _____.

    1. BPB
    2. FAT
    3. Root directory
    4. None of the given
  78. The BIOS interrupt ________ can be used to configure RTC.

    1. 1AH
    2. 2AH
    3. 3AH
    4. 4AH
  79. A cluster is same as block.

    1. True
    2. False
  80. 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
  81. DTE is _________.

    1. Data terminal equipment
    2. Data transmitting equipment
    3. Dual terminal equipment
    4. None of the given
  82. Total No. of bytes that can be stored in Keyboard Buffer is_________.

    1. 16
    2. 32
    3. 64
    4. 128
  83. File can be _______ viewed as organization of data.

    1. Physically
    2. Logically
    3. Both logically and physically
    4. None of the given
  84. 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
  85. 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
  86. ________ is used to read time from RTC.

    1. 1A/02H
    2. 1A/03H
    3. 1A/04H
    4. 1A/05H
  87. Size of FS Info block is _______.

    1. 64 bytes
    2. 128 bytes
    3. 256 bytes
    4. 512 bytes