Notes with worthy tutorials
Critical System Those systems are called critical systems which not only causes inconvenience, no or not-noticeable impact on time, money and life but also causes loss or injuries to life, economical destruction and such bigger impacts when the system fails. For example, an word processor is meant to be used to type texts and if … Read more
Software Process: Software Process is a set of required activities and the outcome of the activities with a target to produce a software product. A software process is a flowchart of developing a software product, which includes fathering requirements, analyzing those requirements, scheduling development phases, checking the developments, implementing changes etc. and this can be … Read more
Types of Software Product: Based on how and why the software products are being developed, software products can be of the following two types Generic Software Products Software products which were developed with the target to sell them to customer eligible to buy with no customization for any specific customer are called generic software products. … Read more
Deadlock In a system, deadlock situations are moments when processes never finish executing and system resources are tied up, which ultimately prevents other processes from ever starting. Dead lock situations are obviously undesirable, however they occur in systems while the following conditions take place simultaneously. These conditions are not completely independent, that is, all four … Read more
Example of Dry Cell – Leclanche Cell: The most common example of dry cell is Leclanche cell invented by French scientist Georges Leclanche. We use to call it a battery. It has a cylindrical Zn container which works as the anode. At the center of the Zn container a carbon or graphite rod is placed … Read more
Chemical bond Atoms of all elements except of the inert gasses have a tendency to combine either with each other or with the atoms of other elements to form cluster of atoms with definite composition. A cluster formed may be either a molecule or an ion. The attraction between the atoms forming the cluster is … Read more
Diamond Diamond is an allotrope of carbon. Due to difference in bonding in its structure, it looks quite different from the other allotropes. Each carbon atom of diamond is sp3 hybridized. The four sp3 orbital arrange themselves in the four corners of a tetrahedron. Each orbital forms a bond with an orbital of another carbon … Read more
Some compounds like hydrogen fluorides, ethanoic acids, benzoic acid form dimmers or trimmers by joining up of their two or three molecules by H-bonding. Sometime, due to the formation of these dimmers or trimmers the molecular weight of these compounds appears to be doubled or tripled. That is, ethanoic acid has molecular weight of 60, … Read more
Atomic spectra: When a ray of light is passed through a glass prism, it is dispersed into a band of seven colors. This is called a spectrum. When a gas or vapor is heated to a high temperature or subjected to electric discharge, it emits light of all wavelengths. This light, if passed through a … Read more
Operating systems (OS) play a crucial role in managing and coordinating various aspects of computer systems. One of the fundamental responsibilities of an operating system is process management, which involves creating, scheduling, and controlling processes. Process in Operating System A process can be thought as a program in execution, but a program by itself is … Read more