learningoperatingsystem

Today, we want to discuss about system calls What  are System Calls •    System Calls provide the Interface between a process and the Operating System. •    These calls are generally available as Assembly language instruction. •    System Calls can also be made directly through HLL  programs for certain systems. •    UNIX System calls can be invoked directly from a C or C++ program. figure 1: structure of system calls An Example of how system calls are used. Consider a simple program to copy data from one file to another file . The first input of the program will be the name of both files. These names can be specified depending on the design of Operation System Once the file names are obtained, the program opens an input file and  create an output file Each of this operations require other System calls and may encounter possible error    conditions. How System Calls Occu...

In order to increase your understanding and knowledge of the operating system, you are encouraged to answer this question. Quotes of success Bonus Test Operating System Of Computer Lis t 2 advantages of a file management system in operating system. Describe 3 types of file structure below Unstructured (Byte sequence) Structured (Record sequence) Tree Differentiate in form of table between contiguous allocation and linked list allocation (disk blocks) of storing file following the aspect below Allocated file Add new file Read a file Advantages Disadvantages

Here, we want to share two conditions for a deadlock to occur. Condition for Deadlock    Mutual Exclusion Model 1. Mutual exclusion: Automatically holds for printers and other non-sharables. Shared entities (read only files) don't need mutual exclusion (and aren’t susceptible to deadlock). Prevention not possible, since some devices are intrinsically non-sharable. Hold And Wait Model 2. Hold and wait:  must guarantee that whenever a process requests a resource, it does not hold any other resources. Require process to request and be allocated all its resources before it begins execution, or allow process to request resources only when the process has none. Low resource utilization; starvation possible.

Menu interface This type of interface lets you interact with a computer or device by working your way through a series of screens or menus. menu driven interfaceThink about your iPod or mobile phone, they both use a menu driven interface. You are presented with a menu, you make a choice and then the next menu appears on the screen. You make another choice and so on. Cashpoint machines (ATMs) are another good example of a menu driven interface. Menu driven interfaces can also be verbal rather than visual. Have you ever made a telephone call and been asked to 'press 1 for abc, press 2 for def, press 3 for ghi'? Most of the software that you use have menu interfaces. You can use many features of the software by working your way through the menu options. Have a look at the menus in your word processor or spreadsheet package and see how many different choices you are given. A well designed menu interface is simple to use, you just follow the instructions and m...

State four types of Operating System 1)       MICROSOFT WINDOWS Operating system designed and produced by Microsoft Corporation. Similar to other operating systems, Windows makes a computer system user-friendly by providing a graphical display and organizing information so that it can be easily accessed. The operating system utilizes icons and tools that simplify the complex operations performed by computers. Estimates suggest that 90% of personal computers use the Windows operating system. Microsoft introduced the operating system in 1985 and it has continued to be widely used despite competition from Apple's Macintosh operating system. example of windows Display of Window 8 Name Release date Release version Editions Build Windows 10 29 July 2015 NT 10.0 [1] Windows 10 Home. Windows 10 Mac 7 Windows 10 Enterprise Windows 10 Education Windows ...