IGNOU MCS 203 SOLVED ASSIGNMENT

Ques 1.

Consider the following jobs.
 

a) Using the SRTF method, compute the completion times of the above jobs, average turn around time and average waiting time.

b) Using the SJF (Shortest Job First) method, compute the completion times of the above jobs, the average turn around time and the average waiting time.

c) Using the Round Robin method (with Quantum2), compute the completion times of the above jobs and the average waiting time.

Ques 2.

Discuss the different techniques for I/O management in an operating system. Explain how buffering, spooling, and caching improve I/O performance. Give examples to illustrate their practical applications.

Ques 3.

Describe the structure of a disk in an operating system and explain the concept of disk scheduling. Compare the FCFS, SSTF, and SCAN scheduling algorithms. Provide an example to demonstrate the working of these algorithms.

Ques 4.

Compare and contrast contiguous and non-contiguous memory allocation methods. Explain the First-Fit, Best-Fit, and Worst-Fit algorithms for memory allocation with examples. Which method is more efficient and why?

Ques 5.

Consider the following page-reference string: 1, 3, 4, 2, 7, 8, 6, 2, 3,9, 6, 4, 2, 1, 3, 5, 9, 10, 4, 1, 5, 3, 4

How many page faults would occur for following replacement algorithms assuming four frames? Remember that all frames are initially empty, so your first unique pages will all cost one fault each.

i. FIFO replacement.

ii. LRU replacement.

iii. Optimal replacement.

Ques 6.

Differentiate between processes and threads. Explain the advantages of multithreading in an operating system. Propose a threading algorithm using a producer-consumer problem and explain how synchronization is achieved using semaphores.

Ques 7.

Explain the concept of virtual memory and its importance in modern operating systems. Describe the working of demand paging and how page faults are handled. Provide an example to demonstrate the process.

Ques 8.

Describe the architecture of a mobile operating system such as Android or iOS. Discuss the key features, differences from desktop operating systems, and challenges associated with mobile OS development.

Ques 9.

Consider the following jobs.
 

a) Using the SRTF method, compute the completion times of the above jobs, average turn around time and average waiting time.

b) Using the SJF (Shortest Job First) method, compute the completion times of the above jobs, the average turn around time and the average waiting time.

c) Using the Round Robin method (with Quantum2), compute the completion times of the above jobs and the average waiting time.

Ques 10.

Discuss the different techniques for I/O management in an operating system. Explain how buffering, spooling, and caching improve I/O performance. Give examples to illustrate their practical applications.

Ques 11.

Describe the structure of a disk in an operating system and explain the concept of disk scheduling. Compare the FCFS, SSTF, and SCAN scheduling algorithms. Provide an example to demonstrate the working of these algorithms.

Ques 12.

Compare and contrast contiguous and non-contiguous memory allocation methods. Explain the First-Fit, Best-Fit, and Worst-Fit algorithms for memory allocation with examples. Which method is more efficient and why?

Ques 13.

Consider the following page-reference string: 1, 3, 4, 2, 7, 8, 6, 2, 3,9, 6, 4, 2, 1, 3, 5, 9, 10, 4, 1, 5, 3, 4

How many page faults would occur for following replacement algorithms assuming four frames? Remember that all frames are initially empty, so your first unique pages will all cost one fault each.

i. FIFO replacement.

ii. LRU replacement.

iii. Optimal replacement.

Ques 14.

Differentiate between processes and threads. Explain the advantages of multithreading in an operating system. Propose a threading algorithm using a producer-consumer problem and explain how synchronization is achieved using semaphores.

Ques 15.

Explain the concept of virtual memory and its importance in modern operating systems. Describe the working of demand paging and how page faults are handled. Provide an example to demonstrate the process.

Ques 16.

Describe the architecture of a mobile operating system such as Android or iOS. Discuss the key features, differences from desktop operating systems, and challenges associated with mobile OS development.

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