NodeJS Questions
Warm up for your NodeJS interview with most asked questions and answers for junior, mid, and senior roles.
What is the role of assert in Node.js?
Show AnswerHide Answer
Assert is a function which is used to check the condition and throw an error if the condition is false.
What is Node.js?
Show AnswerHide Answer
Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It is used to build fast, scalable network applications.
Where is Node.js used?
Show AnswerHide Answer
Node. js is primarily used for non-blocking, event-driven servers, due to its single-threaded nature.
What is Express JS?
Show AnswerHide Answer
Express.js is a free and open-source web application framework for Node.js. It is used for designing and building web applications quickly and easily.
How Node.js read the content of a file?
Show AnswerHide Answer
Node.js uses the fs module to read the content of a file.
What is difference between put and patch?
Show AnswerHide Answer
PUT is used to update the existing resource and PATCH is used to update the part of the resource.
What is the use of yarn in Node.js?
Show AnswerHide Answer
Yarn is a package manager. It is used to install and manage dependencies.
What is npm in Node.js?
Show AnswerHide Answer
NPM is a package manager. It is used to install and manage dependencies.
What is difference between JavaScript and Node.js?
Show AnswerHide Answer
JavaScript is a proper high-level programming language used to create web scripts whereas Node. js is a run time environment built on google's v8 engine.
What is Callback function in node.js?
Show AnswerHide Answer
Callback function is a function which is passed as an argument to another function.
What is npm?
Show AnswerHide Answer
npm is a package manager for Node.js. It is used to install and manage packages.