JNTU
JNTU B.Tech III COMPUTER ORGANIZATION AND OPERATING SYSTEMS Previous Question Paper (May/June - 2019 - R13)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks.
Part A
Differentiate computer organization and architecture.
Answer
Computer Architecture refers to the attributes of a system visible to the programmer, such as instruction sets, addressing modes, and data types. Computer Organization refers to the operational units and their interconnections that realize the architectural specifications, such as control signals, memory technology, and hardware implementation details.
Represent decimal number 6027 in i) BCD ii) excess-3 code
Answer
i) BCD representation: Each digit is represented by its 4-bit binary equivalent: 6=0110, 0=0000, 2=0010, 7=0111. Thus, 6027 = 0110 0000 0010 0111.
ii) Excess-3 code: Add 3 to each digit and convert to 4-bit binary: 6+3=9 (1001), 0+3=3 (0011), 2+3=5 (0101), 7+3=10 (1010). Thus, 6027 = 1001 0011 0101 1010.
What is control memory?
Answer
Sign in to view the complete answer paper.
Which is faster among Hard Wired Control and Microprogrammed Control? Why?
Answer
Sign in to view the complete answer paper.
What is the importance of I/O interface?
Answer
Sign in to view the complete answer paper.
List the advantages and disadvantages of isolated mapped I/O and memory mapped I/O.
Answer
Sign in to view the complete answer paper.
Give a brief note on Operating Systems Generation.
Answer
Sign in to view the complete answer paper.
Consider a logical address space of 64 pages of 1024 words each, mapped onto a physical memory of 32 frames. How many bits are there in the logical address?
Answer
Sign in to view the complete answer paper.
Write the purpose of the open() and close() system calls.
Answer
Sign in to view the complete answer paper.
Give a note on contiguous allocation of disk space.
Answer
Sign in to view the complete answer paper.
Part B
What is a bus? Draw the figure to show how various functional units are interconnected using a bus and explain.
Answer
Sign in to view the complete answer paper.
Explain the performance issues in computer systems.
Answer
Sign in to view the complete answer paper.
Give a brief note on shift micro operations and arithmetic logic shift unit.
Answer
Sign in to view the complete answer paper.
What do you understand by symbolic micro instruction? Give the typical field distribution of a symbolic micro instruction and explain the significance of each field.
Answer
Sign in to view the complete answer paper.
In many computers the cache block size is in the range of 32 to 128 bytes. What would be the main advantages and disadvantages of making the size of cache block larger or smaller? Explain.
Answer
Sign in to view the complete answer paper.
With the help of neat diagram, explain the synchronous DRAM.
Answer
Sign in to view the complete answer paper.
Give the block diagram of interface between a processor and peripheral devices and explain its operations.
Answer
Sign in to view the complete answer paper.
Discuss the different methods of data transfer between the CPU and I/O devices.
Answer
Sign in to view the complete answer paper.
How many characters per second can be transmitted over a 1200 baud line in each of the following modes?
Synchronous serial transmission
Answer
Sign in to view the complete answer paper.
Asynchronous serial transmission with two stop bits.
Answer
Sign in to view the complete answer paper.
Asynchronous serial transmission with one stop bits.
Answer
Sign in to view the complete answer paper.
Explain about LRU with an example.
Answer
Sign in to view the complete answer paper.
In what ways is the modular kernel approach similar to the layered approach? In what ways does it differ from the layered approach?
Answer
Sign in to view the complete answer paper.
What system calls have to be executed by a command interpreter or shell in order to start a new process?
Answer
Sign in to view the complete answer paper.
Describe a mechanism by which one segment could belong to the address space of two different processes.
Answer
Sign in to view the complete answer paper.
Discuss about file system implementation.
Answer
Sign in to view the complete answer paper.
Explain why logging metadata updates ensures recovery of a file system after a file system crash.
Answer
Sign in to view the complete answer paper.