Complete Notes on NodeJS

npm stands for Node Package Manager. Following are the two main functionalities of npm: Online repositories for node.js packages/modules which are searchable on search.nodejs.org Command line utility to install packages, do version management and dependency management of Node.js packages. For a Node.js interview, the correct answer to the question “What is npm? What is the … Read more

Yes, Node.js Crypto module supports cryptography. It provides cryptographic functionality that includes a set of wrappers for open SSL’s hash HMAC, cipher, decipher, sign and verify functions. Yes, Node.js supports cryptography through its built-in crypto module. This module provides cryptographic functionality that includes a set of wrappers for OpenSSL’s hash, HMAC, cipher, decipher, sign, and … Read more

In REPL, the underscore variable is used to get the last result. In Node.js REPL (Read-Eval-Print Loop), the underscore variable (_) serves as a reference to the result of the last operation. It allows users to conveniently access the result of the previous expression or operation without explicitly storing it in a variable. For example: … Read more

Yes. You can evaluate simple expressions using Node REPL. Yes, it is possible to evaluate simple expressions using the Node.js REPL (Read-Eval-Print Loop). REPL stands for Read-Eval-Print Loop, and it allows you to interactively run JavaScript code. You can evaluate expressions, declare variables, define functions, and execute JavaScript statements directly in the Node.js REPL environment. … Read more

Following are the terms used in REPL with their defined tasks: Read: It reads user’s input; parse the input into JavaScript data-structure and stores in memory. Eval: It takes and evaluates the data structure. Print: It is used to print the result. Loop: It loops the above command until user press ctrl-c twice to terminate. … Read more