JNTU
JNTU B.Tech III COMPUTER ORGANIZATION AND OPERATING SYSTEM Previous Question Paper (August/September - 2024 - R16)
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
Explain fixed point representation.
Answer
Fixed point representation is a method for representing fractional numbers by assuming a fixed position for the binary point. The bits are divided into an integer part and a fractional part, where the radix point remains stationary throughout all arithmetic operations.
What is an instruction cycle and write the phases of Instruction cycle?
Answer
An instruction cycle is the sequence of operations a CPU performs to process a single machine instruction. Its phases are:
- Fetch instruction from memory.
- Decode the instruction.
- Read the effective address from memory (if indirect).
- Execute the instruction.
List the components of a CPU.
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Why RTL is preferred for describing internal organization of digital computers?
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Write about the role of Auxiliary memory devices in a computing.
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List out the methodologies involved in handling Priority Interrupt.
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Define process. What is meant by the state of a process?
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Define thread, busy waiting and spinlock.
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Define semaphores. Name some classic problems of synchronization.
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What are the access methods available in a file system?
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Part B
Write about Interrupt and its types.
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Illustrate the phases of Interrupt Cycle with a neat flowchart.
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What is the use of program control instructions? Mention the typical instructions.
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Explain in detail about status bit conditions with example.
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Write about various types of memories in a computer.
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Write about hardware organization of micro programmed control unit.
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What is virtual memory? Explain the relation between address space and memory space in a virtual memory system along with its memory table for mapping?
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Explain how cache memory improves performance of a system.
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Elaborate how DMA bypasses CPU and speeds up the memory operation.
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With a neat schematic, explain about DMA controller and its mode of data transfer.
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Explain Daisy-Chaining priority and Parallel priority interrupt with its hardware diagram.
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Explain the concept used for avoiding deadlocks.
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Explain the ways to recover from deadlocks.
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Write short notes on:
- Thrashing
- Page replacement algorithms LRU.
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Define UFD and MFD.
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List the various different directory structures available and brief about each.
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Brief the free space management techniques.
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Explain the implementation of directory using Hash table.
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