Explain the difference between frontend and backend development?
It’s a great help in developing both web pages and mobile apps. Stubs are certain functions that mimic the behavior of specific modules. They are most often used in test cases since they can provide the answers needed to solve some of the issues that might arise within the modules.
Why Do We Use NodeJs?
Question 6: What are ‘stubs’?
They can create apps and websites using Node and make full use of all features. Intermediate developers are also familiar with ancillary frameworks and how to use them to facilitate development. As a result, your Node JS interview questions should be able to challenge the candidates’ intellect. Whenever an event gets fired, its listener function starts executing.
Node.js operates on a single-thread, allowing it to handle thousands of simultaneous event loops. Here’s a diagram, provided by Sinform.com, that best illustrates https://xcritical.com/ Node.js architecture. As this particular request is simple and does not involve any complex operations, it does not require any separate thread to process it.
When using NodeJs with basic crud or HTML application there is no need for high hopes . Though NodeJs will make it more scalable, there is no need for expecting a traffic flood only because the application is powered by NodeJs. So when the data is provided straightforwardly by, by the server and specially where there is no need to have a separate API, in this case there is no need for using NodeJs. NPM is a popular Node.js package library and the jewel in the crown of the Node.js community. It has millions of downloadable libraries, organized according to specific requirements, and is the largest software registry in the world.
- The same applies to hiring Node.js developers, where interview questions are fundamental for assessing technical prowess.
- Additionally, developers can deploy an API to varied network conditions.
- It is passed as first parameter to the ‘request’ event.
- Similarly, in Node JS, it can do the assign tasks and still keep listening to other events.
- This is yet another one of the Node JS interview questions that do not directly relate to any of the Node functions in particular.
- You can ask questions we listed based on the level of your candidates and experience.
With the browser runtime, you can access the Document Object Model . Node.js uses a consensus-seeking model for its decision process. As each agenda item appears to reach consensus, a moderator asks if any of the collaborators object. If consensus still cannot be reached and as long as there are no additional objections, the agenda item goes to a “majority vote wins” system.
In Node.js, an EventEmitter is a class that includes all the objects capable of emitting events. This can be achieved by attaching named events that are emitted by the object using an eventEmitter.on() function. Thus whenever this object throws an event, the attached functions are invoked synchronously. On the other hand, the programmer errors are actual bugs in the application. Globally deployed packages cannot be imported using require() in Node application directly.
What is callback hell?
You can ask questions we listed based on the level of your candidates and experience. Make your screening process count to get the most promising candidates for the interview round. You can then use our interview questions to select your new Node developer. The interview round is a vital part of any recruitment process. Employers need to ask the right questions to candidates during the interview to screen for essential skills. The same applies to hiring Node.js developers, where interview questions are fundamental for assessing technical prowess.
Node.js Interview Questions and Answers For Experienced Professionals
Netflix, a global media service provider, uses Node.js, you may get the idea of how powerful this environment is. These are just a few reasons why some big brands, including Microsoft, are already using Node.js for their IOT development purposes. You can also read about some great features of Node.js in the next section. In Node.js, the concept of Punycode is used for converting one type of string into another type.