9th Class Computers Science Understanding Basic Concepts of Operating System Time Sharing Operating Systems

   Time Sharing Operating Systems

In time sharing system multiple jobs are executed by switching the CPU between them and the CPU time is shared by different processes. In this environment various users are sharing the central processor, the memory and other resources of the computer system in a manner facilitated, controlled and monitored by the operating system. UNIX is the best example of time sharing operating system.  

 Multitasking OS allows performing more than one task simultaneously. Which one of the following OS does not support multitasking?

(A) Linux                                                                             

(B) Windows XP

(C) DOS                                                                               

(D) All of these

(E) None of these  

Answer: (C)  

Explanation

Correct Option:

(C) DOS does not support multitasking.

Incorrect Option:

(A) Linux supports multitasking.

(B) Windows XP supports multitasking.    

 OS is a master control programs which performs various functions. Which of the following are the functionality of an OS?

(A) Process Management                           

(B) Spooling

(C) Memory Management                          

(D) All of these

(E) None of these  

Answer: (D)  

Explanation

Correct Option:

(D) Operating system works as a resource manager. It involves the following:

(A) Process management

(B) Multiprogramming

(C) Memory Management

(D) Spooling

Incorrect Options:

Rest of the options is incorrect.    

 Which one of the following is the correct full form of Spooling?

(A) Simultaneous Peripheral Operations Of Line

(B) Simultaneous Peripheral Operations On Line

(C) Simultaneous Practical Operations On Line

(D) Simultaneous Peripheral On Line Operations

(E) None of these  

Answer: (B)  

Explanation  

Correct Option:

(B) Simultaneous Peripheral Operations On Line (Spooling) is a process of transferring data program is used to buffer data for the printer and remote batch terminals.

Incorrect Options:

Rest of the options is incorrect.  

• Steve Jobs and Wozniak, the founders of Apple, came up with the very strange idea of selling information processing machines to be used at home.
• In the early 1950s, a computer could execute only one program at a time.    

• Kernel: Is a central controlling part of OS that implements the most primitive of the system's functions.
• Shell: Is a part of software that serves as a user interface it forms the outer layer of an operating system covering the other modules of the operating system.
• Spooling: Is a process of transferring data program which is used to buffer data for the printer and remote batch terminals.  

• OS is system software that manages the operation of a computer.
• The command line interface is a textual user interface in which the user gives instruction to the computer by typing command.
• Operating systems that allow multiple software processes to be run at the same time is called multitasking OS.
• Job Scheduling is a kind of software application which provides a GUI and a single point of control for monitoring of background executions.
• In time sharing system multiple jobs are executed by switching the CPU between them and the CPU time is shared by different processes.
• UNIX is the best example of time sharing operating system.
• UNIX operating system supports three command-line shells.  

 Abbreviations

• Spooling ................ Simultaneous Peripheral Operations on Line