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Evolution of Operating System

Evolution of Operating System The evolution of various types of operating systems can be briefly described as follows: Serial Processing: – Since 1950, the operating system started to be in use. Before 1950, there were no operating systems, and programmers had to directly communicate with the hardware.  And before 1950, if a programmer wants to execute the programs, the programmer had to follow the following steps:First, type a...

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File in Operating System

What is File in Operating System?  A file is defined as a collection of the interrelated information that is stored in the secondary memory or the non-volatile memory such as optical disk magnetic tapes and magnetic disks. A file can also be defined as a sequence of records, bits, and bytes, and the meaning of the file is defined by the user or the creator of file. There is a logical location of each file where the files are located...

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Unix Operating System

Unix Operating System Unix Operating System is a multiuser, portable, time-sharing, and multitasking operating system that was developed in 1969. Unix operating system was developed by a group of AT & T Laboratory employees Dennis Ritchie, Joe Ossanna, Douglas Mcllroy, and Ken Thompson at Bell Labs.  The first language that was used to developed a Unix operating system was Assembly Language and then the Unix operating system was...

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Needs of Operating System

Needs of Operating System There are various needs of operating system: Managing Input-Output UnitThe Operating system as a platform for application programsMultitaskingConsistent user interface Managing Input-Output Unit: – With the help of the operating system, the computer can handle its resources like keyboard, monitor, printer, memory, etc. The resource management is needed for efficient utilization of the resources. The...

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Ubuntu Operating System

Ubuntu Operating System Ubuntu is an open-source and a Linux based operating system. Ubuntu is developed for the Network Servers, Computers, and Smartphones. The Ubuntu operating system was developed by Canonical Ltd, which is a UK based company. The principles which were applied to design the Ubuntu software are based on open-source software development. Features of Ubuntu Operating System There are various features of the Ubuntu...

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Android Operating System

What is Android Operating System? Android is a Linux-based and open-source operating system mainly established for mobile devices like tablet computers and Smartphones. The Android operating system was established by the Open Handset Alliance, led by Google and other companies. Android provides you an integrated approach to the development of the applications for the mobile devices that means developers only develop for Android, and we...

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File Allocation Methods

File Allocation Methods There are different kinds of methods that are used to allocate disk space. We must select the best method for the file allocation because it will directly affect the system performance and system efficiency. With the help of the allocation method, we can utilize the disk, and also files can be accessed. There are various types of file allocations method: Contiguous allocationExtentsLinked...

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Selection in D3.js

Selection in D3.js Selection is an important concept of D3.js. This concept depends upon the Cascading Stylesheet (CSS) selectors. It helps you to choose one or more than one element on a webpage. The Selection also allows you to remove, append, and modify the data items related to the already existing datasets.The selections allow you to modify the most powerful data-driven conversion of the DOM (Document Object Model). The selection...

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SVG Transformation

SVG Transformation The SVG transformation can be defined as to mutate the single SVG shape element or the set of SVG elements. The SVG transformation upholds Rotate, Translate, Scale, and Skew (Shear). SVG also contains an attribute called “Transform,” which supports the transformation. An SVG transformation may consist of the following functions. They are- Rotate The rotate holds the three options, such as angle, the angle of...