To what extent does the use of the identical file-delete algorithm by Symbian, Android, and the iPhone affect the efficiency of these mobile OSes?

Because Symbian, Android, and iPhone all use the same file-delete algorithm, how does this affect the performance of these mobile OSes?

A brief summary of the OS's salient features would be much appreciated. simply by just a few words?

To explain how an OS really works would be much beyond of our scope of expertise.

Consider a system that allocates pages of different sizes to its processes. What are the advantages of such a paging scheme? What modifications to the virtual memory system are provide this functionality?

Could you perhaps provide a brief description of the most common OS invader types?

In the early iterations of the Mac OS, a cut-and-paste technique was employed to significantly reduce the time required to complete tasks, specifically the process of taking minutes, from seconds to a considerably shorter duration. Which newly introduced operating system feature is responsible for this occurrence?

Justify your stance on why a batch OS can't handle today's demanding software like online booking and cash machines. The performance of a time-shared system is very sensitive to the value selected for a time slice. What would happen if a very large number was selected for the time slice? Let's say it turned out to be too little.

Do we imply an OS can multitask by running many programs at once?

What is it about multithreading that makes it so popular, and how does it differ from other OS processes? Explain?