DCA6208 OPERATING SYSTEMS

Description

SESSION	JAN 2026
PROGRAM	MASTER OF COMPUTER APPLICATIONS (MCA)
SEMESTER	II
COURSE CODE & NAME	DCA6208 OPERATING SYSTEM

 

Assignment Set – 1

 

1.a)Define the different types of the Functions of Operating System.

1. b) Explain how object-oriented programming principles are used in the Solaris operating system to support a modular kernel design.

Ans 1.

1. a) Functions of an Operating System

The Operating System (OS) is a system software which manages hardware and software resources, and gives services to software. It serves as an interface between hardware and user devices, ensuring efficient, reliable and safe use of resources on the system.

Process Management: This OS creates, schedules, suspends, resumes, and terminates processes. It controls the

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2. Explain single-threaded and multithreaded processes. How does a multithreaded process improve performance in modern operating systems?

Ans 2.

Single-Threaded Processes

A program is one running that is working with its own memory space and data. It also has code and resources allocated by the operating system. One-threaded processes contain only one execution thread -that is, a single flow of control that executes instructions sequentially. At any point just one instruction is in process at a time, and the program must complete each operation before going to the next. In the beginning, processes on operating systems used single-threaded. Single-threaded systems are more straightforward to design and debug However, they come with a important drawback. If an

 

3. Explain non-preemptive scheduling and how it differs from pre-emptive scheduling.

Ans 3.

Non-Preemptive Scheduling

CPU scheduling is the operating system mechanism that determines which processes within the ready queue is allocated the CPU at any given moment. Non-preemptive schedule, also known as cooperative scheduling is a technique for scheduling CPU where a particular process is allocated the CPU, it is in control until decides to release the CPU, either by stopping, entering a waiting condition due to an input request, or explicitly surrendering the control. The scheduling system does not

 

Assignment Set – 2

 

4. What is deadlock prevention? Explain the four necessary conditions required for a deadlock to occur. Also, describe how deadlock avoidance can be achieved.

Ans 4.

Deadlock Prevention and Necessary Conditions

Deadlock refers to a situation where a set of operations are blocked as each process holds resources while waiting to acquire assets held by processes in the set, leading to a waiting cycle in which there is no way for a process to be able to continue. Deadlock prevention is a proactive approach that guarantees at least at the very least one of four conditions to prevent deadlock from being able to remain in

 

5. a) Explain the concept of segmentation and how it supports the user’s view of memory.
6. b) Define the different types of security attacks that target operating system.

Ans 5.

1. a) Segmentation and User’s View of Memory

Segmentation is a memory-management technique that divides memory into logical units of different sizes named segments. Each segment is a distinct element of the program such as code, variables, functions stacks, arrays, as well as data structure. Unlike paging, segmentation matches what the programmer’s mind naturally sees of programs as a set of distinct logical parts.

A logical address

6. Differentiate between sequential access, direct access, and indexed sequential file access methods in file systems.

Ans 6.

Sequential Access

Sequential access is the easiest and most well-known method for accessing files that reads or written in a strict sequential order starting from the first of the file up to its close of the file. Every read operation is able to retrieve the current record and automatically forwards the pointer of the file towards the following record. The only valid operations are read-next (reads the record in question and increases the position of the pointer) as well as write-next (appends to the existing record the end) while reset (moves the position of the pointer to the starting point). Sequential access is natural for