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Operating Systems

Operating systems, both proprietary and open-source, include those produced by Microsoft, Linux, and Apple Mac

4,423 Questions

Who created the Linux operating system and when did they do it?

Linus Torvalds was the principal engineer who created the Linux kernel, the chief component behind modern Linux operating systems used today such as Ubuntu, SUSE, or Fedora.

Who is are the father of open-source OS?

Open source operating systems can trace their ancestry to many trends in computing of the 60s and 70s. If one had to put a face on the concept, it would be Richard Stallman. Stallman formed the Free Software foundation, and developed or commissioned many of the necessary components of a free and open-source operating system.

Note that Stallman doesn't like the term "open-source", since the source can be available but still restricted in what you are allowed to do with it.

What is the purpose of an operating system?

An operating system is the framework that allows you to communicate with computer hardware in an interactive way. Without this, you would not be able to tell the computer to do anything and it would have any instructions to follow. This is why it is important for a computer to have an operating system. In early days without OS so much problems where faced like accessing or getting output it takes two days. To make it much more efficient OS is used.
To Execute user program easier. To solve the user problem easily.

To make the computer system convenient to use. there are three objective of Operting system-

1:- convenience

2:-Efficiency

3:-Ability to evolve
the three main objectives of operating systems are:

to be convenient and efficient for user

to allocate resources

to provide abstraction

Real-time operating systemlist 5 other computer systems that could have real time processes?

Audio / video editing

digital signal processing

gaming

encryption / decryption

compression

sensors eg: light sensors on smart phones

Explain the operating system layers that is monolithic?

Early computing was performed on a single processor.

Makes use of a single cpu to execute one or more programs for each application

Ex: A uni-processor

What are the features of real time operating system RTOS?

RTOS is a real time operating system.The important features are :- - The necessary signalling functions between interrupt routines and taskcodes are handled by RTOS. - It works as an independent system with no internal or external interdependencies. - There are no loop descisions in RTOS - The RTOS can suspend one task code subroutine in the middle order to run another - The time lag is veryless compared to other systems - There are no random time variables, this is good for a direct relationship between instruction and process. - Tasks are simpler to write. - Under most RTOS tasks are simply subroutines.

What is the Difference between clustered system and multiprocessor system?

is a number of linked systems, working together closely ,so that they form a single computer

Does the operating system provides the means for users to interact with a computer?

the operating system provides the means for users to interact with a computer

How the OS communicate with CPU?

The OS communicates with the CPU via the "kernel" - which is actually a core part of the OS.

When an operating system is loaded into memory, the kernel loads first and remains in memory until the operating system is shut down again. It should load into a protected portion of memory that cannot be written to by any other process. A computer kernel interfaces between the three major computer hardware components, providing services between:

  • the application/user interface
  • the CPU, memory
  • other hardware I/O devices
The rest of the OS makes calls to the kernel, which then interacts with the CPU (or other hardware). If properly implemented, this enforces the principle of "least privilege" - one of the fundamental tenets of computer security.

Why is windows popular?

because it's very good compared to others and also it got more popular when a 9 yr. old became an engineer for it

Who schedules the scheduler?

Per the NFL Operations website, the schedule is created by computers and 4 league officers. The league officers are Senior Vice President of Broadcasting Howard Katz, Director of Broadcasting Blake Jones, Manager of Broadcasting Charlotte Carey and Senior Director of Broadcasting Michael North .

From the NFL Operations website operations.nfl dot com :

"A formula determines each team's opponents every year, and a rotating schedule ensures that every team plays each of the other 31 at least once in a four-year period.

It takes hundreds of computers in a secure room to spit out millions of possible schedules - a process that sets the stage for the schedule-makers to begin the arduous task of picking the best possible one."

What is the use of virtual memory?

Virtual memory is used to increase the size of working memory in the system main memory by using the locations in secondary storage such as harddisk.

How does the operating system interact with computer?

Simplified it grants you access to the hardware. Without an operating system your computer is just a bunch of chips and cables, it's the OS that tells the processor what to do, manages the memory and lets you, and programs, interact with all the components, so it's the interface between user and hardware.

If you are looking for more specific informations about OS you can find those on many (online-) computer or generic encyclopedias such as wikipedia.