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Mysql online test is a set of questions with multiple-choice. You need to choose the best suitable answer. This Question paper contains the questions which are frequently asked in interviews. Mysql online test will show the score once you finish the test. If the score is less then we…
Javascript online test is a set of questions with multiple-choice. You need to choose the best suitable answer. This Question paper contains the questions which are frequently asked in interviews. Javascript online test will show the score once you finish the test. If the score is less then we…
Javascript what are closures used for Closure in JavaScript holds the combination of function and the lexical environment within the same function that the lexical environment has been declared. Consider a below example function Person() { var name = 'Rajani'; function displayName() { console.log(name); } displayName(); } Person(); // output…
What is the event loop in node.js, As you might aware that Node.js is not scripting or programming language. It is an asynchronous event-driven JavaScript runtime. Node.js architecture design is almost similar to like Ruby's Event Machine or Python's Twisted. Nodejs starts executing the by entering into event loop…
Node js introduction and its features Node js introduction and its features, Node.js is a cross-platform run time environment. And it can execute javascript code in it. And Node.js platform runs on a V8 engine that is built by Google. Node js is specially developed for building very high-end scalable…
For better understanding what is the difference between var and let in javascript, let us understand the scope concept in JavaScript. Basically JavaScript has a different scope like Global Scope: The variable declared globally and the same variable is available for access throughout your code. Function Scope: The variable…
What is an object in Javascript Before creating an object in javascript, let's understand what is an object in javascript and its behavior JavaScript has an object entity with a combination of properties. An object has the key-value pair. Every element has the name which is called key Objects help…
What is javascript Javascript is a lightweight, cross-platform and object-oriented computer programming language. Lightweight: The Javascript uses very little memory of the computer. And Javascript has a very simple syntax. Cross-platform: Javascript can be used on multiple platforms and systems. Object-oriented: Javascript is a language that's based on objects. Everything…
Instead of spending your hard-earned money on buying products you can just Prepare Aloe vera gel, plant an aloe vera in a pot and extract the gel from its leaves whenever you want. because it will save you money, but also gives you natural gel without any preservatives. Aloe vera…
Difference between undefined and null in javascript In this article, we will study what is the difference between undefined and null in javascript with examples, let's look at the definition of What is undefined in Javascript? In javascript undefined is also treated as a primitive value. That means it is…