Operating System Unit 1

Que.1     What is Operating System? explain any one types of operating system

Operating System – Definition: 
 

• An operating system is a program that controls the execution of application programs and acts as an interface between the user of a computer and the computer hardware.
• A more common definition is that the operating system is the one program running at all times on the computer (usually called the kernel), with all else being application programs.

Types Of O.S:-

1

Batch Operating System . This type of operating system does not interact with the computer directly. ...

2

Time-Sharing Operating Systems . Each task is given some time to execute so that all the tasks work smoothly. 

3

Distributed Operating System . 

4

Network Operating System .

5

Real-Time Operating System .

Time-Sharing Operating Systems – 
Each task is given some time to execute so that all the tasks work smoothly. Each user gets the time of CPU as they use a single system. These systems are also known as Multitasking Systems. The task can be from a single user or different users also. The time that each task gets to execute is called quantum. After this time interval is over OS switches over to the next task. 

Que.2 What is multiprogramming and multitasking?

Ans:-  Multitasking ” means doing many things simultaneously. 

• For example, while preparing for an exam, you can listen to music at the same time. 
• In software, multitasking is a method in which the computer performs several tasks at the same time. 
• In this way, it appears to the user that the computer is performing multiple tasks at once. 
• Multiprogramming is a technique that allows the computer to execute more than one program at a time. 
• Whereas multitasking is a technique in which a single processor executes a number of tasks simultaneously, multiprogramming is a technique in which a single processor executes a number of tasks in a time-sharing manner..