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
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
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
Q. What are the reasons for building distributed systems? Distributed Systems: Distributed Systems (also loosely coupled systems) are also multiprocessor systems but they will not be sharing clock, memory etc. and will be communicating with each other with high speed buses, telephone lines etc. Processors in distributed systems may vary in size and function and … Read more
Q: What are the different types of operating systems? Briefly describe. Operating systems and computer architecture have had a great influence on each other. As hardware industry started to develop powerful and feature enriched hardware for computers, the operating systems needed to update themselves to harness the power of those hardware. Again, as operating systems … Read more
Data Definition Language (DDL): The specific language used to express the database schema by a set definitions is called Data Definition Language (DDL). The DDL is also used to specify additional properties of the data. Another special type of DDL, called the Data Storage and Definition Language, is used to specify storage and data access … Read more
Database Language: As whatever we want to be manipulated by computer has to be written using specific language, database is not beyond them. To write or create database management system we use database languages. They are of two types; Data Definition Language (DDL) and Data Manipulation Language (DML). DDL is used to design a database … Read more
Disadvantages of File Processing System: Keeping organization information in a file processing system has some disadvantages including the followings, Data Redundancy & Inconsistency: As the files are created by different programmers, there is a huge chance of data redundancy which is responsible for unnecessary storage and access cost. This may also lead to data inconsistency … Read more
Database: A database contains a collection of related items or facts arranged in a specific structure. The most obvious example of a non-computerized database is a telephone directory. DBMS (Database Management System): A database management system is a collection of interrelated data and a set of programs to access those data. It allows people to … Read more