VU Final Term Past Papers
287 solved final term past paper MCQs for CS609 (System Programming) at Virtual University, each with the correct answer marked. Use them to learn the VU question style and test your recall. An independent study tool — not affiliated with VU.
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Q1. The signals are used by various devices to request a DMA operation.
Q2. DMA works in modes.
Q3. DMA Request register can be used to simulate a DMA request through software in case of___.
Q4. Last bytes of data part in partitioning table are the partition table signature.
Q5. Information about further partitioned drives is available at physical block of extended partition.
Q6. A programmer wants to access the DPB(Drive Parameter Block) for C drive using undocumented service 21H/32H, what he should place in DL register ?
Q7. Using the root directory entry and the , we can access the contents of File.
Q8. The LSN of first logical sector of NTFS partition is .
Q9. To minimize defragmenter is used.
Q10. Extended memory can be accessed only after installing the driver.
Q11. DOS uses memory allocation system.
Q12. In protected mode segment register will be called .
Q13. There are Control registers in 80386 and above systems.
Q14. If the CHS (cylinder, head, and sector) address of a disk is known it can be translated in to the_____address and vice versa.
Q15. The DMA requests to acquire buses through the 45. signal.
Q16. In partition table, first bytes contain code which loads the boot block of active partition.
Q17. On a single disk there can be __________ different Operating Systems.
Q18. The block is the first block on disk.
Q19. First cluster in user data area is numbered in a FAT based systems.
Q20. In FAT12 to calculate the address or offset from index, we need to multiply it with .
Q21. PC’s operated on 20 bit address bus can operate in mode.
Q22. Control Registers are used for conveying certain control information for_____Addressing and Co-Processors.
Q23. The least significant bit of Control register ________ is PE-bit which can be set to enable Protected Mode Addressing.
Q24. CD.. command gives the of directory.
Q25. Cluster size is variable and can be measured in power of _____.
Q26. BPB stands for .
Q27. BIOS DO NOT support ______.
Q28. Int 14H __________ can be used to send a byte.
Q29. A single DMA can transfer operands to and from memory in a single a bus cycle.
Q30. An addressable unit on disk can be addressed by three parameters
Q31. Each addressable unit has a unique combination of sec#, head# and track# as its ________ address.
Q32. File control block (FCB) is __________ byte long.
Q33. The first cluster number of file can be found in .
Q34. Total number of clusters of FAT12 are .
Q35. When we mark a file as deleted by placing 0xE5 then the chain of clusters in FAT is also replaced by____
Q36. Size of single entry in Partition Table is ____________.
Q37. To access bettery powered RAM, only ports are important from programming point of view.
Q38. The DMA requests to acquire buses through the signal.
Q39. DOS has built in limit of blocks per cluster.
Q40. BIOS Parameter block is situated in Block.
Q41. MCB is a bytes data structure.
Q42. If virus wants to be in memory independently, it should have its own .
Q43. First cluster in user data is numbered in a FAT based system.
Q44. -----------------------------BIOS services understand --.
Q45. The first cluster number of a file can be found in---------
Q46. The size of FS Info block is
Q47. ------------------- In NTFS first entries are reserved.
Q48. --------- The of boot block constitutes of BPB.
Q49. ------------------------------------------- Extended BIOS function make use of ------------------------------------ address
Q50. LBA address can be used in place of the CHS address.
Q51. In FAT12, the maximum range of clusters is ...
Q52. NTFS volume can be accessed directly in DOS.
Q53. 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.
Q54. S ervice 21H/52H service returns the address of DOS internal data structures in ES: BX______behind the address returned lies the far address of the first MCB in memory.
Q55. The partition table uses the extended service.
Q56. The entry point of execution in EXE File can be
Q57. Using the entry and the FAT we can access the contents of file.
Q58. Control information in files is maintained using
Q59. What will happen if NTFS volume is accessed in DOS?
Q60. DOS device drivers do not understand the data structures.
Q61. Bit number of coprocessor control word is the Interrupt Enable Flag.
Q62. To distinguish 486 with Pentium CPUID Test is used.
Q63. Practically entries are there in FAT 32.
Q64. The keyboard input character scan code is received at port.
Q65. Keyboard uses port as status port.
Q66. Disadvantage of FAT32 is .
Q67. Maximum possible entries in FAT12 are _.
Q68. What will be the value of the word located at 1Fh in DPB when number of free clusters on drive is not known?
Q69. Jump code part contains____bytes in boot block.
Q70. Operating system name contains by tes in boot block.
Q71. File can be viewed as organization of data.
Q72. File can be viewed as collection of clusters or blocks.
Q73. When we talk about FAT based file system, in user data area first cluster number is.
Q74. Cluster number can also be referred as block number.
Q75. To access the block within cluster using BIOS services the cluster number should be converted into .
Q76. What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
Q77. The directory structure of DOS is like .
Q78. Control information about files is maintained using .
Q79. When LSN is equal to zero (0), it means _.
Q80. In FAT32, lower _ bits are used.
Q81. To access drive parameter block we use undocumented service
Q82. Boot block consists of bytes.
Q83. The keyboard device writes a code 0xFA on the port 60H to indicate that the .
Q84. Register can be used to show that the channel is single transfer, block transfer or demand transfer mode.
Q85. Cluster size is reduced in __________.
Q86. In FAT32 __________ root directory entries are there.
Q87. Internal fragmentation is reduced in _______________.
Q88. We can access the contents of File by using the root directory entry and .
Q89. Drive parameter block is derived from .
Q90. If we know the cluster number, we can access the blocks within the cluster using BIOS services directly.
Q91. The size of DPB data structure is _______ bytes.
Q92. The size of FCB data structure is _______ bytes.
Q93. Advantages of FAT32 is/are ________.
Q94. If FAT entry is between FFF0H to FFF6H in FAT16 then .
Q95. File system used in CD’s is_______ file system
Q96. In NTFS, up to _ characters are used to store files names,
Q97. A cluster is a collection of contiguous .
Q98. In NTFS, total sizes of MFT entries are .
Q99. Total No. of bytes that can be stored in Keyboard Buffer is .
Q100. In each byte is needed to be encapsulated in start and end.
Q101. In case of synchronous communication a timing signal is required to identify the start and end of a bit.
Q102. The baud rate is set in accordance with the divisor value loaded within the UART internal registers base +0 and base +1.
Q103. -------------------------------------------- Software based flow control make use of ------------------------------ control characters
Q104. Int service 0 can be used to set the line parameter of the UART or COM port.
Q105. In boot block BIOS parameter block starts from 03H
Q106. IN NTFS, FAT and root directory is replaced by
Q107. Each addressable unit has a unique combination of sec#, head #, track # as its --------- address.
Q108. In memory map of first 1 MB of ram ,the first -------- is called conventional RAM.
Q109. _________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
Q110. _______ is relative address with respect to the start of Logical Drive.
Q111. The practical limit of blocks per cluster is _______.
Q112. In dos we have limit of _______ .
Q113. In Protected Mode, the segment registers are used as _______________
Q114. ________ is an absolute address relative to the start of physical drive.
Q115. Process identify can be obtained from the _______ structure.
Q116. Control of a running fiber can be given to another fiber by using --------- function.
Q117. A thread can enable fiber operation by calling _____function.
Q118. A fiber can obtain its identity by calling _______function.
Q119. The _____ function is used to obtain the process handle using the process ID.
Q120. One process can finish another process using the function _______
Showing the first 120 of 287 MCQs.