Author: ignougroup

Switched communications network A switched communications network transfers data from source to destination through a series of network nodes. Switching can be done in one of two ways. In a circuit-switched network, a dedicated physical path is established through the network and is Read More …

Electromagnetic Spectrum consists of entire range of electromagnetic radiation. Radiation is the energy that travels and spreads out as it propagates. The types of electromagnetic radiation that makes the electromagnetic spectrum. Supports larger bandwidth and hence more information is transmitted. Read More …

Random Sampling 1-Random sampling is a sampling technique where each sample has an equal probability of getting selected 2-Random sampling is unbiased in nature 3-Based on probability 4-Random sampling is representative of the entire population 5-Random sampling is the most Read More …

Object-oriented programming (OOP) is a computer programming model that organizes software design around data, or, rather than functions and logic. An object can be defined as a data field that has unique attributes and behavior. The organization of an object-oriented Read More …

Organizations produce and gather data as they operate. Contained in a database, data is typically organized to model relevant aspects of reality in a way that supports processes requiring this information. Knowing how this can be managed effectively is vital Read More …

When multiple transaction execute concurrently in an uncontrolled or unrestricted manner, then it might lead to several problems. These problems are commonly referred to as concurrency problems in database environment. The five concurrency problems that can occur in database are: (i). Read More …

Difference between Strong and Weak Entity Strong Entity:A strong entity is not dependent of any other entity in the schema. A strong entity will always have a primary key. are represented by a single rectangle. The relationship of two strong entities Read More …

Data Replication is the process of storing data in more than one site or node. It is useful in improving the availability of data. It is simply copying data from a database from one server to another server so that all the Read More …

Binary Tree Data Structure A tree whose elements have at most 2 children is called a binary tree. Since each element in a binary tree can have only 2 children, we typically name them the left and right child. A Read More …

AVL Tree- AVL trees are special kind of binary search trees. In AVL trees, height of left subtree and right subtree of every node differs by at most one. AVL trees are also called as self-balancing binary search trees. Example- Following Read More …