Unit - 2 Operating System: Part 1

What is the main function of an operating system?

• Resource allocator

• Word processor

• Database system

• Web browser

Answer explanation

A program that acts as an intermediate/ interface between a user of a computer and the computer hardware.

Resource allocator (Managing the resources efficiently)

Control Program

What are the goals of an operating system?

• Execute user programs and make problem solving easier

• Make the computer system convenient to use

• Efficiently use available resources

• Pata nahi

What is the role of the kernel in an operating system?

• Recognize hardware

• Manage memory

• Handle network communication

• Control applications

Answer explanation

An operating system is the one program that is running at all the times on the computer- usually called the kernel.

Kernel is a program that (allow) let the hardware to recognize and read the program/process.

Computer system can be divided into which four components?

• • - Keyboard

  • - Mouse

  • - Button

  • - Earbuds

• • - Hardware

  • - Operating System

  • - System/Application

  • - Users

• - Smartphone

  - iPad

  - Laptop

  - Desktop

• BH - 6, C - 119

Answer explanation

Hardware – provides basic computing resources

CPU, memory, I/O devices

Operating system

Controls and coordinates use of resources among various applications and users

System/Application programs – define the ways in which the system resources are used to solving user problems.

Word processors, compilers, web browsers, database systems, video games

Users

People, machines, other computers

What is the function of process management in an operating system?

• Synchronization of processes

• Network administration

• Memory allocation

• File creation

Answer explanation

Process management keeps processes running efficiently. It also uses memory allocated to them and shutting them down when needed.

The execution of a process must be sequential so, at least one instruction should be executed on behalf of the process.

Functions of process management in the operating system are Process creation and deletion, Suspension and resumption, Synchronization process, Communication process.

What is the purpose of file management in an operating system?

• File and directory creation and deletion.

• Manipulating files and directories.

• Backup files on stable storage media.

• Mapping files onto secondary storage.

What is the main function of network management in a distributed system?

• Access shared resources

• Minimize computation

• Speed up data availability

• Reliability of data

Answer explanation

Network management is the process of administering and managing computer networks. It includes performance management, provisioning of networks, fault analysis, and maintaining the quality of service.

A distributed system is a collection of computers or processors that never share their memory. and clock.

They communicate with each other using different communication cables, such as fibre optics.

What is not the main function of main memory management in an operating system?

• Determine memory usage

• Allocate memory to processes

• Keep track of secondary storage

• De-allocate memory

Answer explanation

Main memory is a large array of storage or bytes, which has an address.

The memory management process is conducted by using a sequence of reads or writes of specific memory addresses.

It should be mapped to absolute addresses and loaded inside the memory to execute a program. The selection of a memory management method depends on several factors

What is the primary function of secondary storage management in a computer system?

• - Storage allocation

  - Free space management

  - Disk scheduling

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Answer explanation

The most important task of a computer system is to execute programs. These programs help you to access the data from the main memory during execution.

This memory of the computer is very small to store all data and programs permanently. The computer system offers secondary storage to back up the main memory.

What is the function of I/O device management in an operating system?

• Mapping files onto secondary storage

• Individualities of a specific device

• General device driver code

• Buffer caching system