OMCA103 OPERATING SYSTEM

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Description

SESSION SPRING 2024 PROGRAM MASTER OF COMPUTER APPLICATION(MCA)

SEMESTER I

COURSE CODE & NAME OMCA103 OPERATING SYSTEM

CREDITS 4

 

Assignment Set – 1st

Questions

 

  1. I. Describe the Six layered approach is the operating system point wise in brief.

Ans: The “Six-Layered Approach” in operating systems refers to a conceptual framework that categorizes the functions of an operating system into six distinct layers. These layers help in understanding the hierarchical structure and organization of operating system functionality.

Here’s a brief description of each layer: 

Hardware Layer:  This is the lowest layer, directly interacting with the physical hardware components (CPU, memo

 

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  1. I. Describe Advantages & Disadvantages of Threads over Multiprocesses in brief.

Ans: Threads and multiprocesses are both mechanisms used in operating systems to achieve multitasking and concurrency.

Here’s a brief comparison of the advantages and disadvantages of threads over multiprocesses: 

Advantages of Threads over Multiprocesses:

Efficiency: 

Resource Sharing: Threads within the same process share memory and resources more efficiently compared to

 

  1. I. Describe the Common Scheduling criteria.

Ans: Common scheduling criteria typically include factors that help determine the best time slots or arrangements for activities, meetings, or events.

These criteria often include: 

Availability of Participants: Ensuring that all necessary individuals are free during the proposed time slot.

Time Zones:

 

 

Assignment Set – 2nd

Questions

 

  1. A. Please describe three requirements to satisfy the Critical Section Problem.

Ans: The Critical Section Problem in operating systems deals with ensuring that multiple processes or threads can access shared resources in a way that ensures data consistency and avoids conflicts.

To satisfy the Critical Section Problem, three requirements must be met: 

Mutual Exclusion: Only one process can execute in its critical section at a time. This means that if a process is executing in its

 

  1. A. Please describe the two Page table implementation concepts in brief.

Ans: Page table implementation in operating systems involves managing the mapping between virtual addresses used by processes and physical addresses in main memory.

There are primarily two concepts in page table implementation: 

Hierarchical Page Tables: 

Description: In hierarchical page tables, the page table is structured as a hierarchy of tables or pages. This structure helps manage large address spaces efficiently by dividing the page table into smaller, more manageable parts.

Levels: Typically, hierarchical

 

 

  1. A. Please describe the two forms of Encryption in a distributed environment.

Ans: In a distributed environment, encryption plays a crucial role in ensuring the security and confidentiality of data transmitted over networks and stored across various nodes.

There are two primary forms of encryption used in distributed systems: 

End-to-End Encryption: 

Description: End-to-end encryption (E2EE) ensures that data is encrypted from the sender’s endpoint (source