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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
What operating system was developed in 1969 at AT and Ts bell labs?
Unix was the computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna.
What Companies use the Macintosh operating system?
Around the world countless companies rely on the Macintosh to operate their business. These cover a full range of business types such as forestry, manufacturers, retailers, hospitals, dentists, architects, farmers, and innovative IT operations like Twitter. See the links below for sample profiles.
Dynamically assigned between the component and the operating system.
Distinguish between a client-server and a peer-to-peer models of distributed systems.?
A client-server model can be defined as a centralized environment, where all users, objects, resources, and so on are administered in a centralized location and can, if configured, use any network resources on any workstation on the domain.
A Peer-to-peer model can be defined as a decentralized environment, where the user must be assigned permissions on each workstation in order to access any available resources.
A thread can be loosely defined as a separate stream of execution that takes place simultaneously with and independently of everything else that might be happening.
Which the best bingo app currently out there?
Rated as one of the best bongo apps is mmm bingo app for the iPad. You play with fun money and is a good fix for the bingo addict. Road trip bingo is also a good bingo app for the kids to keep them busy while you are on a road trip.
What is porting of an operating sysytem?
Porting is the process of modifiying the operating system code to make it run on new CPUs and system architectures. For example, if the operating system was originally written to run on x86 CPUs and was later modified to run on ARM processors.
The actions taken by a kernel to context switch bet user levl thread?
When a context switch occurs, the kernel saves the context of the old process into its Program Control Block and loads the saved context of the new process scheduled to run.
The CPU scheduler is the part of the Operating System that determines when to allow each thread to execute. Usually this is done by seeing if all the wait conditions, such as IO wait, timer wait, semaphore wait, etc. have been cleared, and if the thread priority or round-robin turn criteria have been met.
What is the purpose of the operating system's processor management function?
being able to use multiple programs at once..
How can an operating system helps administrator to control a network and manages security?
"http://wiki.answers.com/Q/How_can_an_operating_system_helps_administrator_to_control_a_network_and_manages_security"
The purpose of communications system redundancy is to?
Is to ensure that communications can be maintained if primary systems fail.
What services does a network need to run to support RIS or remote installation services?
Active Directory, DNS and DHCP
What are the differences between the OS Red Hat and White Hat?
There are no correlation. "White hat", equivalent to "ethical hacker", are both colloquial terms for someone who is proficient in systems penetration testing, employed by a company or companies to test and audit enterprise infrastructures and provide feedback. Red Hat as a company develops RHEL (Red Hat Enterprise Linux), an enterprise-level Linux distribution.
Why Linux is the best operating system?
Linux is the generic name for a UNIX-like operating system that can be used on a wide range of devices from supercomputers to wristwatches. The Linux kernel is released under an open source license, so anyone can read and modify its code. It has been modified to run on a large variety of electronics. Although estimates suggest it is used on only 0.5-2% of all personal computers,[8] it has been widely adopted for use in servers and embedded systems[12][13] (such as cell phones). Linux has superseded Unix in most places[which?], and is used on the 10 most powerful supercomputers in the world[14].
The GNU project is a mass collaboration of programmers who seek to create a completely free and open operating system that was similar to Unix but with completely original code. It was started in 1983 by Richard Stallman, and is responsible for many of the parts of most Linux variants. For this reason, Linux is often called GNU/Linux. Thousands of pieces of software for virtually every operating system are licensed under the GNU General Public License. Meanwhile, the Linux kernel began as a side project of Linus Torvalds, a university student from Finland. In 1991, Torvalds began work on it, and posted information about his project on a newsgroup for computer students and programmers. He received a wave of support and volunteers who ended up creating a full-fledged kernel. Programmers from GNU took notice, and members of both projects worked to integrate the finished GNU parts into the Linux kernel in order to create a full-fledged operating system.
Which network type requires a network operating system NOS?
No network requires a Network Operating System (NOS) . They just require network interface hardware and software to use the network to communicate with each other. However, since all modern operating systems also claim to be Network Operating Systems, it doesn't matter.
Client or Server Network
Send by copy and send by reference?
Send by copy may increase safety because the value rather than a reference to the location of the value is passed and therefore the original cannot be corrupted. However, if the value is something large like a struct or binary object, it is advantageous to pass a reference to keep the stack smaller. Also, it is sometimes preferred or necessary to change the original value in-place which requires send by reference.
Which component of the boot sequence analyzes hardware devices before loading the operating system?
bootstrap loader
Is Microsoft Windows a GUI operating system?
Yes, MS Windows 1.0, first developed a user interface in was in the works by 1982, but was not available for sale until 1985and still used 5-1/4" floopy discs, there was no longer a need to type Dos Commands. In May of 1990 Windows 3.0 was introduced it had a full Graphical User Interface (GUI) without the need for a floppy drive to run the PC.
However the idea of a GUI the honor for producing the first working GUI goes to Doug Englebart - at the time an employee of Stanford Research Institute. Englebart and colleagues created a program called the oNLine System in 1965-'68. This program used the first mouse, a Windowing System, and hypertext, and was based on a description of a system called "memex" proposed by Vannevar Bush in 1945. The name "mouse" also comes from this period. 1981 Xerox Star. The first commercial GUI computer, at a cost of $17,000 (over $40,000 dollars in today's money) for each computer.
How does an operating system manage a file system?
An operating system enables you to view files saved onto your storage devices and arrange them into a folder/directory/file structure.
Why is the process table needed in a time sharing system?
From memory:
Process table holds all the processes in the machine - that are either 'waiting' or 'ready' to be processed. A time-sharing system gives processes a time-slice or quantum. Processes can only be executed within this time frame, once it expires, the CPU receives an interrupt signal, the CPU saves its current state in the current process and focuses on the interrupting entity (another process). The scheduler adds/removes new processes to/from the process table as it goes.
I think that's the gist of it~
