VU Final Term Past Papers
126 solved final term past paper MCQs for CS401 (Computer Architecture & Assembly Language 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. Device drivers can be divided into ___ major categories:
Q2. Suppose AL contains 5 decimal then after two left shifts produces the value as
Q3. In graphics mode a location in video memory corresponds to a _____________ on the screen.
Q4. Creation of threads can be
Q5. The thread registration code initializes the PCB and adds it to the linked list so that the __________ will give it a turn.
Q6. VESA VBE 2.0 is a standard for
Q7. Which of the following gives the more logical view of the storage medium
Q8. Which of the following IRQs is derived by a key board?
Q9. Which of the following IRQs is used for Floppy disk drive?
Q10. Which of the following pins of a parallel port connector are grounded?
Q11. The physical address of IDT (Interrupt Descriptor Table) is stored in _______
Q12. In NASM an imported symbol is declared with the _____ while and exported symbol is declared With the_____
Q13. In 68K processors there is a _____ program counter (PC) that holds the address of currently executing Instruction
Q14. To reserve 8-bits in memory ___ directive is used.
Q15. In the “mov ax, 5” 5 is the __________ operand.
Q16. RETF will pop the segment address in the
Q17. For the execution of the instruction “DIV BL”, the implied dividend will be stored in
Q18. When a number is divided by zero “A Division by 0” interrupt is generated. Which instruction is used for this? Purpose
Q19. INT 21 service 01H is used to read character from standard input with echo. It returns the result in ______ Register.
Q20. BIOS sees the disks as
Q21. In 9pin DB 9, which pin number is assigned to CD (Carrier Detect)?
Q22. In 9pin DB 9, Signal ground is assigned on pin number
Q23. In 9pin DB 9, RI (Ring Indicator) is assigned on pin number
Q24. Motorola 68K processors have_____ 23bit general purpose registers.
Q25. When two devices in the system want to use the same IRQ line then what will happen?
Q26. Which flags are NOT used for mathematical operations?
Q27. The physical address of the stack is obtained by
Q28. Value of AH in the write Graphics pixel service is
Q29. Threads can have function calls, parameters and __________ variables.
Q30. How many prevalent calling conventions do exist?
Q31. The serial port connection is a ------------------ connector
Q32. In STOSB instruction, when DF is clear, SI is
Q33. After the execution of STOSW the CX will be
Q34. Which of the following IRQs is connected to serial port COM 1?
Q35. Assembly language is:
Q36. The number of bits required to access 1MB of memory are
Q37. In STOSB instruction, SI is decremented or incremented by
Q38. In programmable interrupt controller, which of the following ports is referred as a control port.
Q39. In device attribute word, which of the following bit decides whether it is a character device or a block device
Q40. In 9pin DB 9, which pin number is assigned to CTS (Clear to send)?
Q41. In 9pin DB 9, which pin number is assigned to RD (Received Data)?
Q42. VESA (Video Electronics Standards Association) organizes 16 color bits for every pixel in
Q43. Programmable Interrupt Controller (PIC) has
Q44. Video services are classified into __________ broad categories
Q45. 8 * 16 font is stored in ________ bytes.
Q46. In DOS input buffer, number of characters actually read on return is stored in
Q47. IRQ 0 has priority
Q48. Thread registration code initialize PCB and add to linked list so that _____ will give it turn.
Q49. Traditional calling conventions are in ______ number
Q50. VESA VEB 2.0 is standard for
Q51. In STOSW instruction, When DI is cleared, SI is
Q52. Interrupt that is used in debugging with help of trap flag is
Q53. INT for arithmetic overflow is
Q54. IRQ for keyboard is ____1_____ 66. IRQ for sound card is ______5_______ 67. IRQ for floppy disk is ______6_______ 68. IRQ with highest priority is
Q55. The physical address of Interrupt Descriptor Table (IDT) is stored in
Q56. OUT instruction uses __AX or AL_____ as source register. 73. IN DB-9 connector the Data Set ready pin is at
Q57. If two devices uses same IRQ then there is
Q58. VESA organizes 16 bit color for every pixel in ratio
Q59. SP is associated with By default
Q60. Which bit of the attributes byte represents the red component of foreground color?
Q61. An 8 x 16 font is stored in ______________ bytes.
Q62. In DOS input buffer, the number of characters actually read on return is stored in___ byte.
Q63. In STOSW instruction, when DF is clear, SI is
Q64. Which of the following interrupts is Non mask able interrupt
Q65. Which of the following IRQs is connected to serial port COM 2?
Q66. The time interval between two timer ticks is?
Q67. In 68K processors there is a 32bit _____ that holds the address of currently executing instruction
Q68. Single step interrupt is
Q69. Types of jump are:
Q70. MS DOS uses ____ display mode.
Q71. Which of the following IRQs is derived by a timer device?
Q72. In 9pin DB 9, which pin number is assigned to DSR (Dataset Ready)?
Q73. In 9pin DB 9, which pin number is assigned to TD (Transmitted Data)?
Q74. The table index (TI) is set to _____ to access the GDT (Global Descriptor Table).
Q75. When a 32 bit number is divided by a 16 bit number, the quotient is of
Q76. IN DB-9 connector the Data Set ready pin is at
Q77. In 9pin DB 9 DSR is assigned on pin number
Q78. In 9pin DB 9 CTS is assigned on pin number
Q79. In 9pin DB 9 CD is assigned on pin number
Q80. A 32bit address register can access up to ...access has .of memory so memory increased a lot.
Q81. Which of the following IRQ is cascading interrupt
Q82. Which of the following interrupts is used for Arithmetic overflow
Q83. An End of Interrupt (EOI) signal is sent by
Q84. The number of pins in a parallel port connector are?
Q85. Sun SPARC Processor has a fixed ______________ instruction size.
Q86. When the subprogram finishes, the _____________ retrieves the return address from the stack and transfers control to that location.
Q87. FS and FS and GS are two ___________________ in protected mode.
Q88. IRQ 0 interrupt have _______________ priority
Q89. Every bit of line status in serial port conveys _____________ information.
Q90. There are total _______________ bytes in a standard floppy disk.
Q91. Memory address space is selected when which of the following instructions is given to the
Q92. PCB stands for?
Q93. The input frequency of the programmable interval timer (PIT) is
Q94. Programmable interrupt controller has two ports 20 and 21. Port 20 is the control port while port 21 is_____
Q95. Which of the following interrupts is used for saving and restoring the registers
Q96. In programmable interrupt controller which of the following ports is referred as an interrupt mask register?
Q97. The programmable interval timer (PIT) has input frequency of
Q98. Peripheral address space is selected when which of the following instructions is given to the processor?
Q99. Direction flag, the interrupt flag, and the trap flag are
Q100. The space where all the registers of a task are stored is called the
Q101. Which of the following interrupt is of highest priority interrupt?
Q102. The instruction used to read a character from the keyboard port is
Q103. Each thread can have their own
Q104. There is no instruction to clear the
Q105. The interrupt mask register which can be used for selectively enabling or disabling interrupts is associated with
Q106. The parallel port connector is called?
Q107. In a rotate through carry right (RCR) instruction applied on a 16 bit word effectively there is
Q108. The 8088 stack works on
Q109. INT 10 is used for __________ services.
Q110. Priority of IRQ 0 interrupt is
Q111. In 9pin DB 9 RD is assigned on pin number
Q112. Which of the following is a special type of interrupt that returns to the same instruction instead of the next Instruction?
Q113. The source registers in OUT is
Q114. In programmable interrupt controller which of the following ports is used for selectively enabling or disabling interrupts
Q115. A 32bit address register can access unto_____ Of memory so memory access has increased a lot.
Q116. Assembly Language FILE-1 1. Suppose AL contains 5 decimal then after two left shifts produces the value as
Q117. . 136. In programmable interrupt controller which of the following ports is referred as an interrupt mask register?
Q118. To clear direction flag which instruction is used
Q119. IRQ for keyboard is ____1_____ 14. IRQ for sound card is ______5_______ 15. IRQ for floppy disk is ______6_______ 16. IRQ with highest priority is
Q120. Memory address space is selected when which of the following instructions is given to the processor?s
Showing the first 120 of 126 MCQs.