8086 Subjective Question Bank

Short Answer Type Questions on 8086 Microprocessor

1. What is the architecture of the 8086 microprocessor?
2. What is the difference between the 8086 and 8088 microprocessors?
3. What are the memory addressing modes of the 8086 microprocessor?
4. What is the maximum memory capacity that can be addressed by the 8086 microprocessor?
5. What is the clock frequency of the 8086 microprocessor?
6. How many interrupts does the 8086 microprocessor support?
7. What is the purpose of the interrupt vector table in the 8086 microprocessor?
8. What are the data transfer instructions in the 8086 microprocessor?
9. What is the difference between the MOV and XCHG instructions in the 8086 microprocessor?
10. What is the difference between the PUSH and POP instructions in the 8086 microprocessor?
11. What is the function of the AH and AL registers in the 8086 microprocessor?
12. What is the function of the BX register in the 8086 microprocessor?
13. What is the function of the CX register in the 8086 microprocessor?
14. What is the function of the DX register in the 8086 microprocessor?
15. What is the function of the SI and DI registers in the 8086 microprocessor?
16. What is the function of the BP and SP registers in the 8086 microprocessor?
17. What are the arithmetic instructions in the 8086 microprocessor?
18. What is the difference between signed and unsigned arithmetic operations in the 8086 microprocessor?
19. What is the function of the CMP instruction in the 8086 microprocessor?
20. What is the function of the INC and DEC instructions in the 8086 microprocessor?
21. What is the function of the ADD and SUB instructions in the 8086 microprocessor?
22. What is the function of the MUL and DIV instructions in the 8086 microprocessor?
23. What is the function of the AND, OR, and XOR instructions in the 8086 microprocessor?
24. What are the branching instructions in the 8086 microprocessor?
25. What is the difference between the JMP and CALL instructions in the 8086 microprocessor?
26. What is the function of the RET instruction in the 8086 microprocessor?
27. What is the function of the LOOP instruction in the 8086 microprocessor?
28. What is the function of the JZ, JNZ, JC, JNC, JA, and JNA instructions in the 8086 microprocessor?
29. What are the shift and rotate instructions in the 8086 microprocessor?
30. What is the function of the ROL and ROR instructions in the 8086 microprocessor?
31. What is the function of the SHL and SHR instructions in the 8086 microprocessor?
32. What is the function of the SAL and SAR instructions in the 8086 microprocessor?
33. What is the purpose of the flag register in the 8086 microprocessor?
34. What are the flags that are set or cleared by the arithmetic instructions in the 8086 microprocessor?
35. What are the flags that are set or cleared by the shift and rotate instructions in the 8086 microprocessor?
36. What is the function of the CARRY flag in the 8086 microprocessor?
37. What is the function of the ZERO flag in the 8086 microprocessor?
38. What is the function of the SIGN flag in the 8086 microprocessor?
39. What is the function of the PARITY flag in the 8086 microprocessor?
40. What is the function of the AUXILIARY CARRY flag in the 8086 microprocessor?
41. What is the function of the OVERFLOW flag in the 8086 microprocessor?
42. What is the purpose of the instruction queue in the 8086 microprocessor?
43. What is the difference between the prefetch queue and the instruction queue in the 8086 microprocessor?
44. What is the purpose of the segment registers in the 8086 microprocessor?
45. What are the default segment register values in the 8086 microprocessor?
46. What is the function of the CS register in the 8086 microprocessor?
47. What is the function of the DS register in the 8086 microprocessor?
48. What is the function of the ES register in the 8086 microprocessor?
49. What is the function of the SS register in the 8086 microprocessor?
50. What is the difference between near and far memory addressing in the 8086 microprocessor?
51. What is the function of the segment override prefix in the 8086 microprocessor?
52. What is the difference between the MOV and LEA instructions in the 8086 microprocessor?
53. What is the function of the CLC, STC, and CMC instructions in the 8086 microprocessor?
54. What is the function of the CMPXCHG instruction in the 8086 microprocessor?
55. What is the function of the XADD instruction in the 8086 microprocessor?
56. What is the purpose of the LOCK prefix in the 8086 microprocessor?
57. What is the function of the IN and OUT instructions in the 8086 microprocessor?
58. What is the difference between the IN and INS instructions in the 8086 microprocessor?
59. What is the difference between the OUT and OUTS instructions in the 8086 microprocessor?
60. What is the function of the INT instruction in the 8086 microprocessor?
61. What is the purpose of the BIOS in the 8086 microprocessor?
62. What is the purpose of the interrupt service routine in the 8086 microprocessor?
63. What is the purpose of the device driver in the 8086 microprocessor?
64. What is the purpose of the assembler in the 8086 microprocessor?
65. What is the function of the linker in the 8086 microprocessor?
66. What is the purpose of the loader in the 8086 microprocessor?
67. What is the function of the debugger in the 8086 microprocessor?
68. What is the purpose of the emulator in the 8086 microprocessor?
69. What is the difference between real mode and protected mode in the 8086 microprocessor?
70. What is the function of the MMU in the 8086 microprocessor?
71. What is the purpose of the paging mechanism in the 8086 microprocessor?
72. What is the purpose of the segmentation mechanism in the 8086 microprocessor?
73. What is the difference between direct and indirect addressing in the 8086 microprocessor?
74. What is the purpose of the index register in the 8086 microprocessor?
75. What is the function of the segment register in the 8086 microprocessor?
76. What is the difference between the MOV and LDS instructions in the 8086 microprocessor?
77. What is the difference between the MOV and LES instructions in the 8086 microprocessor?
78. What is the function of the REP prefix in the 8086 microprocessor?
79. What is the function of the REPE and REPNE prefixes in the 8086 microprocessor?
80. What is the function of the LOOPZ and LOOPNZ instructions in the 8086 microprocessor?
81. What is the difference between the JZ and JE instructions in the 8086 microprocessor?
82. What is the difference between the JNZ and JNE instructions in the 8086 microprocessor?
83. What is the difference between the JA and JNBE instructions in the 8086 microprocessor?
84. What is the difference between the JB and JC instructions in the 8086 microprocessor?
85. What is the difference between the JNA and JBE instructions in the 8086 microprocessor?
86. What is the difference between the JNB and JNC instructions in the 8086 microprocessor?
87. What is the difference between the JNL and JGE instructions in the 8086 microprocessor?
88. What is the difference between the JLE and JNG instructions in the 8086 microprocessor?
89. What is the function of the SHL and SHR instructions in the 8086 microprocessor?
90. What is the difference between the SAL and SHL instructions in the 8086 microprocessor?
91. What is the function of the ROL and ROR instructions in the 8086 microprocessor?
92. What is the function of the RCL and RCR instructions in the 8086 microprocessor?
93. What is the difference between the DIV and IDIV instructions in the 8086 microprocessor?
94. What is the difference between the MUL and IMUL instructions in the 8086 microprocessor?
95. What is the function of the CBW and CWD instructions in the 8086 microprocessor?
96. What is the function of the PUSH and POP instructions in the 8086 microprocessor?
97. What is the purpose of the CALL and RET instructions in the 8086 microprocessor?
98. What is the function of the NOP instruction in the 8086 microprocessor?
99. What is the difference between the XCHG and XADD instructions in the 8086 microprocessor?
100. What is the function of the OR, XOR, and AND instructions in the 8086 microprocessor?
101. What is the difference between the ADC and SBB instructions in the 8086 microprocessor?

Long Answer Type Questions on 8086 Microprocessor

102. Explain the architecture of the 8086 microprocessor and how it differs from other microprocessors.
103. Discuss the various modes of operation in the 8086 microprocessor and how they are used in real-world applications.
104. Explain the concept of memory segmentation in the 8086 microprocessor and how it affects the programming process.
105. Describe the instruction set of the 8086 microprocessor and provide examples of common instructions used in programming.
106. Discuss the interrupt system of the 8086 microprocessor and how it is used in real-world applications.
107. Explain the process of interfacing input/output devices with the 8086 microprocessor and provide examples of real-world applications.
108. Discuss the various memory types supported by the 8086 microprocessor and explain their uses in different types of applications.
109. Describe the process of programming the 8086 microprocessor in assembly language and provide examples of common programming techniques.
110. Explain the concept of memory-mapped I/O in the 8086 microprocessor and how it is used in interfacing with peripherals.
111. Discuss the various debug tools available for the 8086 microprocessor and explain how they are used in the development process.
112. Explain the concept of pipelining in the 8086 microprocessor and how it improves the processing speed.
113. Describe the arithmetic and logic operations supported by the 8086 microprocessor and provide examples of their use in programming.
114. Discuss the concept of stacks in the 8086 microprocessor and how they are used in the execution of subroutines.
115. Explain the concept of interrupts in the 8086 microprocessor and how they are used to handle external events.
116. Describe the memory organization in the 8086 microprocessor and how it affects the programming process.
117. Discuss the various addressing modes supported by the 8086 microprocessor and explain how they are used in programming.
118. Explain the process of interfacing with memory and I/O devices using the 8086 microprocessor.
119. Discuss the various instructions used in the programming of the 8086 microprocessor for flow control and looping.
120. Describe the different types of interrupts supported by the 8086 microprocessor and explain how they are prioritized.
121. Explain the process of interfacing with the 8255 programmable peripheral interface using the 8086 microprocessor.
122. Discuss the concept of memory segmentation in the 8086 microprocessor and how it affects memory access and programming.
123. Explain the process of interfacing with the 8259 programmable interrupt controller using the 8086 microprocessor.
124. Discuss the various input/output operations supported by the 8086 microprocessor and provide examples of their use in programming.
125. Describe the process of interfacing with the 8253 programmable interval timer using the 8086 microprocessor.
126. Explain the concept of timing diagrams in the context of the 8086 microprocessor and how they are used in programming.
127. Discuss the concept of coprocessors in the 8086 microprocessor and how they can be used to improve performance.
128. Explain the process of interfacing with the 8279 programmable keyboard/display controller using the 8086 microprocessor.
129. Discuss the various memory addressing modes supported by the 8086 microprocessor and provide examples of their use in programming.
130. Describe the process of interfacing with the 8251 programmable communication interface using the 8086 microprocessor.
131. Explain the concept of flag registers in the 8086 microprocessor and how they are used in programming.
132. Discuss the interrupt handling mechanism in the 8086 microprocessor, including the role of the interrupt vector table and interrupt service routines.
133. Explain the role of the segment and offset registers in the 8086 microprocessor and how they are used to access memory.
134. Discuss the process of interfacing with the 8255 programmable peripheral interface using the 8086 microprocessor, including the various modes of operation.
135. Explain the concept of pipelining in the 8086 microprocessor and how it can be used to improve performance.
136. Describe the process of interfacing with the 8254 programmable interval timer using the 8086 microprocessor, including the various modes of operation.
137. Discuss the various arithmetic and logical operations supported by the 8086 microprocessor and provide examples of their use in programming.
138. Explain the concept of memory-mapped I/O in the 8086 microprocessor and how it is used to interface with peripherals.
139. Discuss the process of interfacing with the 8237 DMA controller using the 8086 microprocessor.
140. Explain the concept of virtual memory in the context of the 8086 microprocessor and how it can be used to overcome limitations in physical memory.
141. Discuss the process of interfacing with the 8274 programmable CRT controller using the 8086 microprocessor.