Programming Addict

When you heard the term JAVA SCRIPT the first thing that will come to your mind is web browser because its the most common way to execute JS codes. with NodeJS you will no longer require a web browser to execute your java script code because NodeJS  is an open-source, cross-platform, JavaScript run-time environment that executes JavaScript code outside of a web browser. NodeJS is built on Google Chrome's V8 Engine.  

Most simple answer for this question is, because NodeJS is everywhere. NodeJS is widely used by many large enterprise companies because its fast , efficient and most importantly it is the best option when it comes to scalabilty. 

in the following list you can see some huge companies that widely use NodeJS.

• Easy Scalability
• High Performance 
• You can develop a complete web app just knowing the javascript without knowing any other languages.
• Easy to Learn
• Highly Extensible

SQL or Structured Query Language is a language that we are using to manipulate relational databases. in sql databases data is stored in multiple tables according to a schema. first relational database created on 1970s by an IBM Researcher using SESQL.

both of thees systems has their own advantages and disadvantages, In order for a SQL Database to be more effective,input data needs to be well structured and consistent. if we have a well defined schema in our SQL Database it will also help us to reduce data redundancy. therefor SQL is much better for a system that has constant and unchanging data. if your requirements are not clear at the beginning of the system (if you are not sure about what data your gonna store in your database) NoSQL system will be more suitable for you. because NoSQL databases doesn't need consistent data. and if we also compare the scalabilty of thees two systems NoSQL clearly wins because NoSQL databases are horizontally scalable unlike SQL databases NoSQL Databases (which are vertically salable)  can handle more traffic by sharing or adding additional servers.   

Conclusion 

every software engineer should know thees concepts.

S — Single Responsibility Principle

This theory specifies that objects of a superclass are to be replaceable without breaking the program with objects of its subclasses. That allows your subclass objects to behave in the same way as your superclass objects do. You can accomplish this by following a few rules which are somewhat similar to the Bertrand Meyer specified contract model design.