Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech II COMPUTER ORGANIZATION Previous Question Paper (February - 2024 - R15)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Define instruction formats.
Answer
An instruction format is a layout of bits in an instruction that defines the operation code (opcode), the addressing modes, and the operand addresses or registers involved in the execution of a machine-level instruction.
How do addressing modes influence the execution of instructions?
Answer
Addressing modes determine how the effective address of an operand is calculated. They influence execution by reducing the number of bits needed in the instruction, providing flexibility in accessing data structures like arrays, and enabling efficient management of program variables and pointers, which directly affects the instruction cycle time and code density.
What is meant by asynchronous data transfer?
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What triggers interrupt initiated I/O?
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Define virtual memory.
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How is memory connected to the CPU in a computer system?
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Which addressing mode is commonly used for accessing data stored in consecutive memory locations?
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How does the 8086 handle memory segmentation?
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Which register is often used as an index register in 8086 assembly language programs?
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What is the advantage of using the LOOP instruction in assembly language programs?
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Part B
Give an in-depth overview of memory and its functions in a computer.
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Elaborate on the significance of status bit conditions in program control.
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What are program interrupts? Differentiate between the types of interrupts in computer organization, giving examples of each.
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Discuss the modes of transfer in asynchronous serial transfer. Highlight the advantages and disadvantages of each mode.
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Discuss the features and applications of the Intel 8089 IOP.
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Differentiate between isolated I/O and memory-mapped I/O.
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Provide a detailed explanation of the Memory Hierarchy and its significance in computer systems.
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Differentiate between associative and set associative mapping.
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Describe the concept of miss and hit ratio in cache memory. How do these ratios impact system performance?
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State and explain the factors influencing the access time.
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Explain the special functions of general purpose registers in the 8086 microprocessor.
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Explain the following terms:
8086 CPU pin diagram.
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Addressing modes of 8086.
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Describe the instruction format of the 8086 microprocessor with examples.
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Write an assembly program in 8086 to evaluate a simple arithmetic expression involving multiplication, and division.
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