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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Server Side JavaScript | 8% | - Salesforce API integration - Node.js applications - Modules and file operations |
| Topic 2: Testing | 7% | - Automated testing strategies - Test-driven development principles - Unit testing with Jest |
| Topic 3: Variables, Types, and Collections | 23% | - Type coercion and type conversion - Array manipulation (map, filter, reduce, forEach, find) - JSON parsing and stringification - String manipulation and Date objects - Variable declaration (var, let, const, scoping, hoisting) |
| Topic 4: Objects, Functions, and Classes | 25% | - Object creation, properties, and prototypal inheritance - Function declarations, expressions, and arrow functions - ES6 Classes, constructors, methods, and inheritance - JavaScript modules (export, import) - Higher-order functions and closures |
| Topic 5: Asynchronous Programming | 13% | - Promises and async/await - Event loop and asynchronous code execution - Callback patterns |
| Topic 6: Browser and Events | 17% | - Event handling, propagation, bubbling, and capturing - Browser Developer Tools - DOM manipulation |
| Topic 7: Debugging and Error Handling | 7% | - try-catch blocks - Logging strategies and debugging techniques |
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NEW QUESTION # 140
for (let number = 2; number <= 5; number += 1) {
// faster code statement here
}
Which statement meets the requirements to log an error when the Boolean statement evaluates to false?
Answer: D
Explanation:
console.assert(condition, message?) logs an assertion error if condition is falsy.
To log an error when number + 2 === 0 is false, use:
console.assert(number + 2 === 0);
Other options are invalid or do not behave as described: console.error always logs, assert alone is not a built-in browser global, and console.classy doesn't exist.
NEW QUESTION # 141
Refer to thecode below:
Const pi = 3.1415326,
What is the data type of pi?
Answer: C
NEW QUESTION # 142
Given the following code:
is the output of line 02?
Answer: B
NEW QUESTION # 143
Which two implementations of utils.js support foo and bar?
Answer: C,D
Explanation:
}
NEW QUESTION # 144
A developer imports:
import printPrice from '/path/PricePrettyPrint.js';
What must be true about printPrice for this import to work?
Answer: B
Explanation:
________________________________________
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge The syntax:
import printPrice from 'module';
means the module must export its function as a default export:
export default function printPrice() { ... }
Why the others are wrong:
Named exports require curly braces:
import { printPrice } from 'module';
"all export" and "multi export" are not JavaScript terms.
Therefore, printPrice must be the default export.
________________________________________
JavaScript Knowledge Reference (text-only)
Default imports use: import name from 'module'.
Named imports require braces: import { name } from 'module'.
NEW QUESTION # 145
......
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