System Programming (CS609)

1. 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)

2. DCE is ___________.

   1. Data communication equipment
   2. Dual communication equipment
   3. Data clearing equipment
   4. None of the given

3. There are two types of communication; synchronous and anti synchronous

   1. True
   2. False

4. 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

5. The accumulative time that is required to access the selected block is called ________.

   1. Access time

6. At IRQ7 Interrupt # __________ is used.

   1. 0x0A
   2. 0x0B
   3. 0x0C
   4. x0F

7. 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

8. The BIOS interrupt ________ can be used to configure RTC.

   1. 1AH
   2. 2AH
   3. 3AH
   4. 4AH

9. DSR stands for _________.

   1. Data set ready
   2. Data service ready
   3. Data stock ready
   4. None of the given

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

    1. 9
    2. 10
    3. 11
    4. 12

11. Total number of clusters of FAT12 are ________.

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

12. _______ 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

13. 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

14. If we know the cluster number, we can access the blocks within the cluster using BIOS services directly.

    1. True
    2. False

15. _______ 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

16. Software based flow control make use of _________control characters

    1. XON
    2. XOFF
    3. XON and XOFF
    4. None of the given

17. Drive paramrter block is derived from ________.

    1. FCB
    2. FAT
    3. BPB
    4. CPB

18. DMA may not support memory to memory transfer

    1. True
    2. False

19. 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

20. A cluster is same as block.

    1. True
    2. False

21. 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

22. BPB stands for ________.

    1. BIOS parameter block
    2. BIOS processing block
    3. Base processing block
    4. BIOS partition block

23. _______ is a collection of contagious blocks.

    1. Cluster
    2. Disk
    3. Track
    4. Platter

24. File is ________ viewed as an organization of data physically it can be collection of clusters or blocks.

    1. logically
    2. physically

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

    1. True
    2. False

26. File can be _______ viewed as organization of data.

    1. Physically
    2. Logically
    3. Both logically and physically
    4. None of the given

27. Cluster number can also be referred as block number.

    1. True
    2. False

28. 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

29. 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

30. _______ 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

31. 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

32. _______ store the base address for LPT1.

    1. 40:00H
    2. 40:02H
    3. 40:08H
    4. 40:1AH

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

    1. 16
    2. 32
    3. 64
    4. 128

34. When LSN is equal to zero (0), it means ________.

    1. LSN is relative address with respect to the start of Logical

35. DOS has practically limit of _________ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256

36. 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

37. ______ is used to read a block against its LSN.

    1. absread( )
    2. abswrite( )
    3. lsnread( )
    4. None of the given

38. LSN of FSInfo block is available at _____.

    1. BPB
    2. FAT
    3. Root directory
    4. None of the given

39. The ______ service # is not used in any interrupt.

    1. 01
    2. 02
    3. 03
    4. FF

40. Boot sector is the ________ logical sector of NTFS partition.

    1. First
    2. Second
    3. Third
    4. Fourth

41. 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

42. ______ is Disk interrupt.

    1. 10H
    2. 11H
    3. 13H
    4. 14H

43. ________ No. of bytes are used to store the character in the key board buffer.

    1. 1
    2. 2
    3. 4
    4. 8

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

    1. 17H
    2. 18H
    3. 20H
    4. 21H

45. In DOS we have limit of _______ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256

46. In FAT32, lower _______ bits are used.

    1. 48 bits
    2. 36 bits
    3. 28 bits
    4. 32 bits

47. 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

48. The size of each entry in FCB of FAT12 and FAT16 file systems is:

    1. Nibble
    2. Byte
    3. 2 Bytes
    4. 4 Bytes

49. 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

50. ______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

51. The service _________ is called the keyboard hook service.

    1. 15H/2FH
    2. 15H/4FH
    3. 15H/FFH
    4. None of the given

52. 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

53. 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

54. Size of FS Info block is _______.

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

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

    1. True
    2. False

56. In NTFS, FAT and root directory has been replaced by ________.

    1. JFT
    2. MFT
    3. TFT
    4. SFT

57. BIOS support _________UARTS as COM ports.

    1. 6
    2. 4
    3. 3
    4. 2

58. ________ is used to read time from RTC.

    1. 1A/02H
    2. 1A/03H
    3. 1A/04H
    4. 1A/05H

59. 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()

60. NTFS volume can be accessed directly in DOS.

    1. True
    2. False

61. The __________ function simply enables the self test facility within the modem control register.

    1. STOn()
    2. SelfTest()
    3. SelfTestOn()
    4. None of the given

62. ______ is the first block on disk

    1. LBA=2 block
    2. LBA=0 block
    3. LBA=1 block
    4. None of the given

63. 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

64. DOS has a built in limit of ________ blocks per cluster.

    1. 32
    2. 64
    3. 128
    4. 256

65. 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

66. DTE is _________.

    1. Data terminal equipment
    2. Data transmitting equipment
    3. Dual terminal equipment
    4. None of the given

67. 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

68. 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

69. 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

70. 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

71. 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

72. Counter register can be used to divide clock signal.

    1. True
    2. False

73. 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

74. 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

75. ______ structure is a tree like structure.

    1. DOS Directory
    2. Disk
    3. Sector
    4. None of the given

76. 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

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

    1. True
    2. False

78. 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

79. Control information about files is maintained using ______.

    1. BPB
    2. DPB
    3. FCB
    4. FPB

80. The service number is usually placed in the ________ register.

    1. AL
    2. CL
    3. AH
    4. AX

81. 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

82. There are ________ kinds of serial communication.

    1. 2
    2. 3
    3. 4
    4. 5

83. 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

84. To store a cluster in FAT32 ________ is/are needed.

    1. Nibble
    2. Byte
    3. 2 Bytes
    4. 4 Bytes

85. 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

86. Int 14H __________ can be used to send a byte.

    1. Service # 0
    2. Service # 1
    3. Service # 2
    4. None of the given

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

    1. True
    2. False

Select a course code for Objective Questions:

ACC311 ACC501 BIF101 BIF401 BIF501 BIO101 BIO201 BIO202 BIO203 BIO204 BIO301 BIO302 BIO303 BIO401 BIO503 BNK603 BT101 BT201 BT301 BT302 BT401 BT402 BT403 BT404 BT405 BT406 BT501 BT504 BT505 BT604 CHE201 CHE301 CS001 CS101 CS201 CS202 CS204 CS301 CS302 CS304 CS311 CS401 CS402 CS403 CS408 CS501 CS502 CS504 CS506 CS508 CS601 CS602 CS604 CS605 CS607 CS609 CS610 CS614 CS707 CS710 ECO401 ECO402 ECO403 ECO404 EDU302 EDU401 EDU402 EDU501 EDU601 ENG101 ENG201 ENG301 ENG501 FIN611 FIN624 FIN625 ISL201 IT430 MCM101 MCM301 MGMT623 MGT101 MGT211 MGT301 MGT401 MGT402 MGT501 MGT502 MGT503 MGT510 MGT601 MGT603 MKT501 MKT610 MKT630 MTH101 MTH202 MTH302 MTH501 MTH601 MTH634 PAK301 PHY101 PHY301 PSY101 PSY403 PSY502 PSY512 SOC101 SOC301 SOC401 STA301 STA630 STA641 ZOO102 ZOO401 ZOO501 ZOO502 ZOO503 ZOO504 ZOO505 ZOO506 ZOO510 ZOO630

Select a course code for Subjective Questions:

ACC311 CS001 CS101 CS201 CS301 CS607 CS701 CS702 CS703 CS704 CS707 CS708 CS710 CS711 CS718 CS721 CS724 ECO401 ECO403 ENG101 ENG301 MGT703 MTH501 STA301