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| Section | Weight | Objectives |
|---|---|---|
| Objects, Functions, and Classes | 25% | - Object creation and manipulation - Higher-order functions - Function declarations and expressions - Arrow functions - Modules and decorators - Execution flow and context - Prototypal inheritance - ES6 classes and inheritance - Variable scope and closures |
| Testing | 7% | - Writing and modifying unit tests - Unit testing concepts - Test effectiveness evaluation - Test coverage and reliability |
| Asynchronous Programming | 13% | - Promises (creation, chaining, error handling) - Async/Await syntax - Asynchronous patterns for business requirements - Event loop and execution flow - Callbacks |
| Server Side JavaScript | 8% | - Server-side JavaScript implementations - Core Node.js modules - Package management (npm) - CLI commands - Node.js fundamentals |
| Variables, Types, and Collections | 23% | - Arrays and collections - Truthy and falsy evaluations - Primitive and complex data types - Type coercion and conversion - Strings, numbers, and dates - JSON parsing and manipulation - Variable declarations and initialization |
| Debugging and Error Handling | 7% | - Error handling techniques (try/catch/finally) - Console methods for debugging - Custom error types - Breakpoints and code inspection |
| Browser and Events | 17% | - Browser Developer Tools usage - Event propagation (bubbling and capturing) - Interacting with forms and user input - Event handling and listeners - DOM manipulation - Browser-specific APIs |
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NEW QUESTION # 48
Refer to the code below:
let timeFunction =() => {
console.log('Timer called.");
};
let timerId = setTimeout (timedFunction, 1000);
Which statement allows a developer to cancel the scheduled timed function?
Answer: A
NEW QUESTION # 49
GIven a value, which three options can a developer use to detect if the value is NaN?
Choose 3 answers !
Answer: B,C
NEW QUESTION # 50
Which option is a core Node;js module?
Answer: C,D
NEW QUESTION # 51
Which three actions can be using the JavaScript browser console?
Choose 3 answers:
Answer: A,C,E
NEW QUESTION # 52
developer removes the HTML class attribute from the checkout button, so now it is
simply:
<button>Checkout</button>.
There is a test to verify the existence of the checkout button, however it looks for a button with
class= "blue". The test fails because no such button is found.
Which type of test category describes this test?
Answer: B
NEW QUESTION # 53
......
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