Introduction Semantic means the study of meaning in language. It is the study of interpretation of signs or symbols, which are used in agents or communities within same or different contexts.
In French language word has its origins in Greek “semantikos” means “significant”.
Web means a complex network of fine threads constructed by a spider, or WWW (World Wide Web (W3)) is a system connected with different server systems that support specially formatted documents. These documents are in HTML (Hypertext markup language) which links to other document including audio, video and different graphics. There are metadata, which gives describes other data. Continue reading “Semantic Web”
Introduction to Flashback Technology
Flashback provides a simple, powerful and completely non-disruptive mechanism for recovering from human errors.It is used when logical corruption occurs in Oracle Database and data needs to be recovered quickly and easily.
This is applicable at Database, Table and Transaction Level.
With this technology you can diagnose, how errors are introduced in database and then repair the damage. There are different flashback technologies like Flashback Database,Flashback Drop, Flashback Table, Flashback Query, Flashback Version Query,Flashback Data Archive, Flashback Transaction Query. Almost all above mentioned technology uses the undo data for historical data other than Flashback Database and Flashback Drop, which uses Flashback logs and Recycle bin respectively. Continue reading “Flashback Database”
Earlier in angular 1, we had using (ng-init), (ng-change) directives to access page initialization, change event of controller. This feature will expand in angular 2 and come up as lifecycle hooks with different phases.
So first we will know what are a Lifecycle hooks?
Lifecycle hooks are simply sequentially functions that called for specific phase of component’s life in our angular apps.
According to angular documentations lifecycle hooks are:
Angular creates it, renders it, creates and renders its children, checks it when its data-bound properties change, and destroys it before removing it from the DOM. Continue reading “Angular Component Life cycle Hooks”
With just one tap of figure, we can do much of the daily routine work like ordering food, book a cab and many more with the help of mobile. Mobile app business is predicted to generate $188.9 billion in global revenue by 2020 as compared to $88.3 billion in 2016 according to Statista. In this fastest growing mobile industry native android and iOS development is too much time consuming as we have to write the same app twice and we have to spend more money on developers too.
JSON Web Token (JWT) is an open standard and are just one piece of the puzzle in ensuring trust and security in our application. The reason why JWT are used is to prove that the sent data was actually created by an authentic source. (are not used to secure data)
A JSON Web Token consists of three parts: Header, Payload and Signature.
• The header component of the JWT contains information about how the JWT signature should be computed. The header is a JSON object in the following format:
In this JSON, the value of the “typ” key specifies that the object is a JWT, and the value of the “alg” key specifies which hashing algorithm is being used to create the JWT signature component. Continue reading “Json Web Token (JWT)”
What is Software architecture?
Software architecture is the process of defining a structured solution that fulfils all of the technical and operational requirements, while optimizing common quality attributes such as performance, security, and manageability.
Architectural decision is based on several factors
Series of decisions based on a wide range of factors, and each of these decisions can have considerable impact on the quality, performance, maintainability, and overall success of the application.
Architectural decision includes the selection of the structural elements and their interfaces by which the system is composed.
Consider the following high level concerns when thinking about software architecture:
• How will the users be using the application?
• How will the application be deployed into production and managed?
• What are the quality attribute requirements for the application, such as security, performance, concurrency, internationalization, and configuration?
• How can the application be designed to be flexible and maintainable over time?
• What are the architectural trends that might impact your application now or after it has been deployed?
Software architectural documents need to be simple and to be created with different views based on requirement of viewers which can be business analyst, software developers, tech leads.