Mac Os X

6.2) Preemptive scheduling allows a process to be invoked/disturbed in the middle of its execution by taking the CPU and assigning it to another process which is in queue where as in case of NonPreemptive scheduling, process will give up on CPU only when the current process is executed and finished.

Ans: Concurrency is a condition that comes into existence when there is a minimum of two threads are making progress. A more summed up form of Parallelism that can include time-slicing as a form of virtual parallelism.''

Short-term: First it selects a process that’s already in memory and ready to execute. Then it allocates the CPU to it.

The processor (otherwise known as CPU) is the very soul and performance core of the computer system; it is what allows the operating system and other software applications to-run. Every program demands dedication from the processor to decode commands that are then actionedinside the CPU to make them work.When a program is running, the CPU has to make every command work consistently one after the other. However, modern processors have the power to process commands side by side. This means that the quicker the commands are executed, the quicker the program responds to the user. Central Processing Units (CPUs) play an important role when it comes to maintaining

2. Data transfer among the main memory and the CPU register proceeds place through two registers namely.......

A multiprogramming is used to keep the CPU busy most of the time, i.e. increase utilization of system CPU. This is due to the fact that multiprogramming is performed by job scheduling, i.e. with the subset of all the jobs kept in memory. Thus when CPU has to wait, then OS switches to another job for keeping CPU busy.

Symmetric multiprocessing treats all processors as equals, and I/O can be processed on any CPU.

There are many different types of computers, many different software programs. Computers have a wide variety of uses, entertainment and work are just a few of them. In order for a computer to function properly and to use any of the work or entertainment software, a computer needs an operating system. The main operating systems are Windows and Macintosh, both have their benefits and both have their disadvantages. Many people use Mac for editing videos. Linux is used for coding. Windows is used things like browsing the internet or playing games. There is a very intense debate as to which operating system is the best. Many say Mac for its user friendly software. Some say Linux, for its extreme customizability. The vast majority of people side

Using explicit communication will help to use the system interconnect in comparing with implicit communication where the messages used to update the content of shared memory for cache coherence.

Macs and PCs have been around for quite some time now; as a result, there have been many debates between which one is better. Mac is supposedly the cool kid on the block while PC’s are conveyed as being business oriented. Both Macs and PCs have their advantages and disadvantages, and companies often try say what their products have that the other institutions don’t. In the Mac vs PC advertisement it seems as if the Mac outshines the PC, however, in the Surface Pro 3 advertisements it feels as if the PC is more efficient. Different companies use different tactics to get their consumers hooked onto an advertisement to try and make them prefer a certain product over another; companies often use marketing schemes to grab the attention of customers. Both Apple and Microsoft use color to enhance the way things look. Microsoft uses a color that darkens out the Apple product, and Apple uses

would most likely be PC. Mac is also a computer, so why won’t anyone think of Mac? An ordinary person might think that a PC can refer to any computer which is why he/she might not think of Mac. Unfortunately, that is not true. What does it refer to? PC is a shorthand way of saying any computer that runs on Windows. That is why Macs can’t be in the category of PCs. There are many more comparable and contrastable features of a Mac and a PC, such as: Where it is made, its software, and its conveniences.

Adding more virtual desktops- this feature has been existing in both Linux and Mac. Finally, Windows has introduced it in Windows 10. It is named “Task View” and is located on the Taskbar. If you need to add a new desktop, just move to the task bar and the n click on the “Task View” button which is lo0cated there. After that, choose “Add a desktop”. A virtual desktop will then be added. It is also possible for you to add an array of desktops in your system. If you navigate to the “Task View”, you will see all of the desktops which you created.

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Since the first Macintosh operating system, System 1, back in 1984 there has been 15 major versions issued. System 1 was the beginning point of the GUI based systems made available to the market. No longer relying on the text command line, it relied on the user manipulation of the GUI and mouse. However, the Mac OS Classic had its shortcomings. According to Jonathan Levin (2012), “Memory management was poor, however, and multitasking was cooperative, which—by today’s standards--is considered primitive. Cooperative multitasking involves process voluntarily yielding their CPU timeslice, and works reasonably well when processes are well behaved” (p. 3,4). This wasn’t always the case and any process malfunction would shut down the system. System 3, released in 1986 introduced File System Hierarchy, storing files in a tree like directory that is currently common on all operating systems today. It also was the first system to have Disk Cache that kept regularly used commands in the memory that sped up operations. There were several minor versions in between System 3 until System 7. System 7 was released in 1991 and it made use of a hard drive instead of a floppy disk that was too limited in size. It also had virtual memory that used free space on the hard drive as random access memory (RAM). Mac OS 7.6, released in 1997, was the first version to use the “Mac OS” instead of “System” in it naming scheme. Mac OS 7.6 and Mac OS 8.0 released also in 1997, where very

The Register is a form of local storage space on the CPU which holds all the data which is being processed. It can usually occupy the top-most position of memory, in which it provides high-speed storage space and fast access to that data. (Computer Hope, 2014)