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Lec-1 Introduction to OS

Description

• An operating system is a collection or group of software that manages and controls computer hardware, computer resources, and also gives common services for computer programs.

• The operating system is an important component of the software in a computer system.

Prerequisite

• Better have some basic knowledge on computer concepts like what is keyboard, mouse, monitor, input, output, primary memory, and secondary memory,

Topics Covered

• Memory Management • Paging • IPC and Threading • Scheduling

• Semaphores • Deadlocks • Disk Scheduling

For whom

• For computer science students to help them understand the basic to advanced concepts related to the operating system.

• It will also be helpful for those students who are preparing them for their Engineering Syllabus.

Reference books

1. “Operating System Concepts” by Avi Silberschatz and Peter Galvin

2. “Operating Systems: Internals and Design Principles” by William Stallings

3. “Operating Systems: A Concept-Based Approach” by D M Dhamdhere

4. “Operating System: A Design-oriented Approach” by Charles Crowley

Q & A
Exam Questions

Q1 . Write a note on Device-controller
Q2 . Write the process model in brief.
Q3 . What is a system call? How it is handled by an OS?
Q4 . Write the architecture of different operating system Structures
Q5 . What is the process state? Write the state transition diagram.
Q6 . What is a process control block?
Q7 . What is interrupt? How it is handled by an OS?
Q8 . What is the thread? Explain the thread structure. Write different types of thread
Q9 . Write first come first serve – FCFS scheduling algorithm with an illustration.
Q10 . Describe Banker’s algorithm.

The RR (Round Scheduling) scheduling algorithm is mainly for time-sharing systems
The circular queue is set up in such a way that the CPU scheduler bypasses the queue and allocates the CPU to each process in an interval of about 10 to 100 ms

This is the process of using the output of one program as the input of another program.
For example, in addition to sending a list of folders or drives to the home screen, you can also send its list to a file via a pipe, or send it to a printer

It provides users with an interface in which operations can be performed by interacting with icons and graphic symbols.
The user does not have to remember and type commands, but simply click a button to execute a process.

The sockets are used to establish a connection between two applications. The endpoint of the connection is called a socket.

Real-time system is used in the case when rigid-time requirements have been placed on the operation of a processor. It contains well-defined and fixed time constraints.

The kernel is the core and most important part of a computer operating system, which provides basic services for all parts of the OS.

The overall kernel is the kernel that contains all the operating system code, which resides in a single executable image.

An executing program is known as a process.
• Operating System Processes.
• User Processes

• New Process
• Running Process
• Waiting Process
• Ready Process
• Terminated Process

The paging is used to solve the problem of external fragmentation in the operating system. This technology ensures that you get the data you need as quickly as possible.

The demand paging specifies that if the memory area is not currently used, it will be swapped to disk to make room for the application.

Thread is the basic unit of CPU utilization. It consists of thread ID, program counter, register set, and stack.

The RAID stands for Redundant Array of Independent Disks. It is used to store the same data redundantly to improve the overall performance.

Deadlock is a specific situation or condition where two processes are waiting for each other to complete so that they can start. But this situation causes a hang for both of them.

It is used to avoid deadlock. It is named as Banker's algorithm on the banking system where bank never allocates available cash in such a manner that it can no longer satisfy the requirements of all of its customers.

KISHORERAM K

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Category Computer Science
Language English
Price 49.00
Validity 1 Year
Rating 5 | 1 Reviews
Q & A 15
Exam Questions 10
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Computer Science

Operating Systems(OS)

Lec-1 Introduction to OS

KISHORERAM K

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Computer Science

1.Introduction

2.Memory Management

3.Paging & Page Replacement

4.Inter process communication & Threading

5.Scheduling

6.Semaphores

7.Deadlocks

8.Disk Scheduling

Operating Systems(OS)

Lec-1 Introduction to OS

1.Introduction

2.Memory Management

3.Paging & Page Replacement

4.Inter process communication & Threading

5.Scheduling

6.Semaphores

7.Deadlocks

8.Disk Scheduling

Q1 . What is the RR scheduling algorithm?

Q2 . What is piping?

Q3 . What is the GUI?

Q4 . What is a socket?

Q5 . What is a real-time system?

Q6 . What is the kernel?

Q7 . What is a monolithic kernel?

Q8 . What do you mean by a process?

Q9 . What are the different states of a process?

Q10 . What is the use of paging in an operating system?

Q11 . What is the concept of demand paging?

Q12 . What is a thread?

Q13 . What is RAID?

Q14 . What is deadlock?

Q15 . What is Banker's algorithm?

KISHORERAM K

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