Notes on Node.JS

REPL stands for Read Eval Print Loop. It specifies a computer environment like a window console or Unix/Linux shell where you can enter a command, and the computer responds with an output. REPL environment incorporates with Node.js. In the context of Node.js interview questions, the correct answer to “What is REPL in Node.js?” would be: … Read more

I/O operations Heavy computation Anything requiring blocking In Node.js, the event loop allows for asynchronous execution of certain tasks, primarily I/O operations and callbacks. Here are some types of tasks that can be done asynchronously using the event loop: File System Operations: Reading from or writing to files asynchronously without blocking the execution of other … Read more

No, it is not possible to access DOM in Node. No, it is not possible to access the Document Object Model (DOM) directly in Node.js. The DOM is a programming interface for HTML and XML documents and is typically associated with web browsers. Node.js is primarily used for server-side scripting and doesn’t have a built-in … Read more

The control flow does the following job: Control the order of execution Collect data Limit concurrency Call the next step in a program In Node.js, “Control Flow” refers to the order in which statements are executed in a program. This concept becomes particularly relevant when dealing with asynchronous operations, which are common in Node.js due … Read more

Control flow function is a generic piece of code that runs in between several asynchronous function calls. In Node.js, a control flow function is a mechanism used to manage the asynchronous execution of code. Given that Node.js operates in a non-blocking, event-driven manner, control flow functions are essential for handling tasks that depend on the … Read more