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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Debugging and Error Handling | 7% | - Defensive programming practices - Console methods and logging - Error types and exception handling - Debugging tools and breakpoints |
| Topic 2: Server-Side JavaScript | 8% | - Command-line tools and scripts - Core Node.js modules - Module system and require/import - Node.js fundamentals and runtime |
| Topic 3: Asynchronous Programming | 13% | - Event loop and micro/macro tasks - Fetch API and HTTP requests - Promises and chaining - Callbacks and callback hell - Async/await syntax |
| Topic 4: Variables, Types, and Collections | 23% | - Type coercion and conversion rules - Variable declaration and initialization - Working with strings, numbers, dates, and booleans - Array methods and data manipulation - Truthy and falsy values - JSON parsing and usage |
| Topic 5: Testing | 7% | - Testing frameworks and assertions - Unit testing concepts - Code coverage and best practices - Test doubles and mocks |
| Topic 6: Objects, Functions, and Classes | 25% | - Modules and imports/exports - Object creation, properties, and methods - Function definitions, parameters, and scope - Decorators and advanced function patterns - Class syntax, inheritance, and prototypes - Closures and execution context |
| Topic 7: Browsers and Events | 17% | - Script loading and execution order - Event handling, propagation, and delegation - Browser APIs and Web Storage - Document Object Model (DOM) manipulation - Window and document object properties |
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NEW QUESTION # 57
A developer receives a comment from the Tech Lead that the code given below has
error:
const monthName = 'July';
const year = 2019;
if(year === 2019) {
monthName = 'June';
}
Which line edit should be made to make this code run?
Answer: D
NEW QUESTION # 58
Refer to the code below:
let sayHello = () => {
console.log ('Hello, world!');
};
Which code executes sayHello once, two minutes from now?
Answer: A
NEW QUESTION # 59
A developer at Universal Containers is creating their new landing page basedon HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.
Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?
Answer: D
NEW QUESTION # 60
Given the code below:
Which method can be provide a visual representation of the list if users and to allow sorting by the name or email attributes.
Answer: A
NEW QUESTION # 61
Given the code below.
What is logged to the console?
Answer: C
NEW QUESTION # 62
......
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