Coding Help Tips Resources Tutorials
Google Apps Scripts and Web Development Tutorials and Resources by Laurence Svekis
Functions What is a callback function? A) A function that is passed as an argument to another function.B) A function that returns another function.C) A function that is executed immediately after declaration.D) A function that calls itself. Answer: A) A function that is passed as an argument to another function. Explanation:A callback function is passed … Read more
JavaScript events follow a structured flow within the DOM, known as event propagation, which includes two main phases: capturing and bubbling. Event delegation leverages this flow to efficiently handle events on multiple child elements using a single event listener on a parent. 1. Event Propagation 1.1. Capturing Phase Example: document.body.addEventListener( “click”, () => console.log(“Capturing phase”), … Read more
100 Node JS Questions Welcome to the Node.js Mastery Quiz! This quiz is designed to challenge and enhance your understanding of Node.js, covering a wide range of topics including core modules, asynchronous programming, server creation, and more. Whether you’re a beginner looking to test your knowledge or a seasoned developer aiming to refresh your skills, … Read more
100 Questions Test your CSS Knowledge Welcome to the Ultimate CSS Quiz! Are you ready to put your CSS skills to the test? This quiz is designed to challenge your knowledge of Cascading Style Sheets (CSS) and help you solidify your understanding of web design fundamentals. Whether you’re a beginner looking to practice your skills … Read more
Here are 50 multiple-choice questions related to Functional Programming in JavaScript, covering Pure Functions and Immutability, Map, Filter, Reduce, and other Array Methods, Declarative vs. Imperative Programming, Lazy Evaluation and Infinite Sequences, and Monads, Functors, and Other FP Concepts. Each question includes a detailed explanation of the correct answer. Pure Functions and Immutability Map, Filter, … Read more
100 Advanced JavaScript Multiple Choice Questions with Answers and Explanations JavaScript is a versatile and powerful language used widely for web development. To truly master JavaScript, especially its advanced concepts, it’s essential to understand not just the syntax but the underlying principles and behaviors of the language. Below are 100 advanced multiple-choice questions designed to … Read more
1. What is the output of the following code? console.log(typeof null); A) “object”B) “null”C) “undefined”D) “boolean” Answer: A) “object” 2. How can you create an immutable object in JavaScript? A) Object.freeze(obj)B) Object.seal(obj)C) Object.preventExtensions(obj)D) Object.immutable(obj) Answer: A) Object.freeze(obj) 3. What does the reduce method do? A) Iterates over an array and returns a new arrayB) Iterates … Read more
1. What is a closure in JavaScript? Explanation: A closure is a function that retains access to its outer scope’s variables even after the outer function has returned. This allows the inner function to maintain a reference to the variables in its enclosing scope. 2. How does JavaScript handle asynchronous operations? Explanation: JavaScript handles asynchronous … Read more
JavaScript is a dynamic and powerful language that is essential for web development. Here are 50 more multiple-choice questions with detailed explanations to help you further enhance your knowledge and skills. Question 1 What will the following code output? console.log([] == []); A) trueB) falseC) undefinedD) Error Answer: B) false Explanation: In JavaScript, two array … Read more
Question 1 What will be the output of the following code? console.log(typeof null); A) “null”B) “undefined”C) “object”D) “number” Answer: C) “object” Explanation: In JavaScript, typeof null returns “object”. This is a well-known bug in JavaScript that exists for legacy reasons. Question 2 What is the output of the following code? console.log(0 == ‘0’); A) trueB) … Read more