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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Objects, Functions, and Classes | 25% | - Class syntax, inheritance, and prototypes - Decorators and advanced function patterns - Object creation, properties, and methods - Closures and execution context - Modules and imports/exports - Function definitions, parameters, and scope |
| Topic 2: Variables, Types, and Collections | 23% | - JSON parsing and usage - Truthy and falsy values - Type coercion and conversion rules - Variable declaration and initialization - Array methods and data manipulation - Working with strings, numbers, dates, and booleans |
| Topic 3: Browsers and Events | 17% | - Script loading and execution order - Window and document object properties - Event handling, propagation, and delegation - Browser APIs and Web Storage - Document Object Model (DOM) manipulation |
| Topic 4: Server-Side JavaScript | 8% | - Node.js fundamentals and runtime - Command-line tools and scripts - Core Node.js modules - Module system and require/import |
| Topic 5: Asynchronous Programming | 13% | - Callbacks and callback hell - Fetch API and HTTP requests - Async/await syntax - Promises and chaining - Event loop and micro/macro tasks |
| Topic 6: Debugging and Error Handling | 7% | - Console methods and logging - Defensive programming practices - Error types and exception handling - Debugging tools and breakpoints |
| Topic 7: Testing | 7% | - Test doubles and mocks - Testing frameworks and assertions - Code coverage and best practices - Unit testing concepts |
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NEW QUESTION # 120
Refer to the code below:
Const myFunction = arr => {
Return arr.reduce((result, current) =>{
Return result = current;
}, 10};
}
What is the output of this function when called with an empty array ?
Answer: C
NEW QUESTION # 121
Which three statements are true about promises?
The executor of a new promise runs automatically.
Answer: A,B,C
NEW QUESTION # 122
Refer to the code below:
What is the value of result when the code executes?
Answer: A
NEW QUESTION # 123
Refer to the following array:
Letarr = [ 1,2, 3, 4, 5];
Which three options result in x evaluating as [3, 4, 5] ?
Choose 3 answers.
Answer: A,B,D
NEW QUESTION # 124
Refer to the following code:
Let sampleText = 'The quick brown fox jumps';
A developer needs to determine if a certain substring is part of a string.
Which three expressions return true for the given substring ?
Choose 3 answers
Answer: A,B,C
NEW QUESTION # 125
......
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