Operating Systems

Protect valuable aircraft

When you network operating systems you will have the benefit of both operating systems. You have to ensure both systems are compatible before networking them.

Explain the key characteristics of the following forms of operating systems

i) Batch

"Non-proprietary" is the opposite of the above. These are more commonly referred to as "free" operating systems, since you have access to the underlying code, and can modify it. Linux and FreeBSD are excellent examples of non-proprietary operating systems. The choice of non-proprietary operating systems can make it much easier to upgrade hardware as new technology becomes available.

For professional expertise, can work flxeibly in different environments. It pays to be able to use multiple OS. It all depends what you mean by "study". If you mean at university level, the only reasons are either, because you intend to write one, or out of pure interest.

something's got to tell the processor what it needs to be doing at any moment in time. That's one of the jobs of an operating system

Because the software has been pre programed into the computer thus setting up a perminate code and procer / memey

Well i don't know any spies but i put my bets on them having custom distros of linux that they have modified to the security they need. If not then they will probably use a security evaluated operating system e.g Trusted Solaris.

that systems are designed and operated to produce reliable data in such areas as information about customers, suppliers, and employees, project costing, rights and obligations related to contractual agreements, and competitors and market conditions.

The hard drive is not found

When the computer and system detects a new device attached, an inquiry signal is sent to device requesting ID information. The Plug and Play compatible device responds with its identification code. The system searches for an ID in its device tables that matches the response. if a match is found it loads drivers for that device, tries to perform automatic configuration for the device and make it available for the software applications. If there is no matching device available, depending on the system and version in use, it may display available drivers and ask which to use or it may ask to search the internet or a manufacturers site for drivers or it may ask for the location of drivers on the system or it may declare the device not available.

The terms can generally be used interchangeably, although some people will argue that an application is a "userland" program (that is a program that the user would use) and a software program could also be utilities and daemons, for example (software for the system to use, not generally for the end user).

Also known as the process state, the execution context is the internal data the Operating system uses to control or supervise a process.

Avast!, Malwarebytes and Spybot are examples of anti-malware programs that offer both paid and freeware versions. BigOven is an example of freeware that lets people store recipes. AceMoney Lite is an example of free budgeting software.

Job

INTERFACES

Park n Fly will answer thsi question. It's located near the airport (about 10 mins away) and they have a shuttle that'll take you to and from the said carpark.

I called earlier (as I'm about to fly out of the city as well) and the rate is at 381 php per day (a little steep if you ask me).

multiprogramming-there is no way for single user to keep either cpu or the io divices busy at all times...

It was created by these people at Xerox Corp. Thye created the first computer, Apple was the first commercial computer maker. But yea, they made this basic OS to just store files, read them, edit them.

"They typically require about the same, but you will find that servers have more memory because they are used by more clients at once." This is close to the mark, but merits some clarification. Desktops typically have just one user, and so have only a handful of processes running. Most servers are used as web servers. They respond to requests for web pages by retrieving the web page's content from disk and then sending it over the internet to the requestor's machine, which is usually a desktop. The "more clients" of a server are not individual users, but "more client requests" from remote users. Also, a single remote user may launch multiple requests at the same time. For example, Google and other search engines use programs called "robots" or "spiders" that systematically probe the internet looking for newly published content. Servers do indeed usually have more memory then desktops, and often much more of it, for a variety of reasons. Typically the server will launch a separate thread for each request. Each such thread needs memory of its own, though the amount required is much less than that needed to process each request by creating a full copy of the server code. That is, you only need to provide new memory space for the thread's data and execution state. The requests for pages are not uniformly distributed. For example, the "Slashdot effect" is the name given to the effect observed when Slashdot publishes a new story with a tantalizing title. Many Slashdot readers then click on the link, and so some server which has been quietly working away with a modest workload is suddenly faced with a torrent of requests from multiple users all seeking to access the same page at the same time. Multiple requests for the same page at the same time are also common to news sites such as cnn and the New York Times. The standard approach to deal with this is to "cache" the content, by which is meant that the content is copied from disk to memory. Memory is much faster than disk memory, usually by at least a factor of one hundred.

Desktops also need much less memory because they serve only a single user, so the demand on the processor is constrained both by the speed at which the user can type and the speed at which data can be sent over the internet. This has resulted in "server consolidation," in which many workstations are consolidated by putting the disks on a single server. For example, a large IBM mainframe can support tens of thousands of individual desktop users. This is more efficient in hardware cost and especially in the amount of electric power required.

Most desktops are busy only a tiny fraction of the time. For example, consider a typical home user running Windows on a 2GHz desktop. They may read 20 emails, view 100 pages, and write 2 or 3 emails in an evening. The load on the processor is less than a minute's worth of work, but the desktop is consuming electricity at essentially the same rate for the entire evening. For example, my Ubuntu desktop typically idles at 60 watts, and goes up to about 100 watts briefly when I accesss a web page or do a compilation. Four hours is 240 minutes, so in four hours most machines are used for only a minute, much less than one percent of the time on. thanks,dave http://daveshields.wordpress.com

1) GUI(Graphical User Interface) Vs CLI 2) Multi-user vs. Single user 3) Multitasking 4) Multiprocessing 5) Multithreading 6) Networked vs. standalone 7) Real-time Systems

Each process running on a processor needs its own logical address space. This can only be realized if each process has its own page table. To support this, a processor that supports virtual memory must have a page table base register that is accessible by the operating system. For operating system security, this register is only accessible when the processor is in system mode.

The operating system maintains information about each process in a process control block. The page table base address for the process is stored there. The operating system loads this address into the PTBR whenever a process is dispatched.

The first Mac OS X 10.0 was called "Cheetah" it was released in 2001.

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