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| Section | Weight | Objectives |
|---|---|---|
| Debugging and Error Handling | 7% | - Console methods for debugging - Breakpoints and code inspection - Error handling techniques (try/catch/finally) - Custom error types |
| Testing | 7% | - Writing and modifying unit tests - Test coverage and reliability - Unit testing concepts - Test effectiveness evaluation |
| Server Side JavaScript | 8% | - Package management (npm) - Server-side JavaScript implementations - Node.js fundamentals - Core Node.js modules - CLI commands |
| Objects, Functions, and Classes | 25% | - Higher-order functions - Execution flow and context - ES6 classes and inheritance - Function declarations and expressions - Variable scope and closures - Prototypal inheritance - Arrow functions - Object creation and manipulation - Modules and decorators |
| Variables, Types, and Collections | 23% | - Variable declarations and initialization - Truthy and falsy evaluations - JSON parsing and manipulation - Primitive and complex data types - Strings, numbers, and dates - Type coercion and conversion - Arrays and collections |
| Asynchronous Programming | 13% | - Asynchronous patterns for business requirements - Async/Await syntax - Event loop and execution flow - Promises (creation, chaining, error handling) - Callbacks |
| Browser and Events | 17% | - Event handling and listeners - DOM manipulation - Browser-specific APIs - Event propagation (bubbling and capturing) - Interacting with forms and user input - Browser Developer Tools usage |
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NEW QUESTION # 45
Which statement can a developer apply to increment the browser's navigation history without a page refresh?
Which statement can a developer apply to increment the browser's navigation history without a page refresh?
Answer: D
NEW QUESTION # 46
Which three statements are true about promises?
The executor of a new promise runs automatically.
Answer: A,B,D
NEW QUESTION # 47
Refer to the code snippet:
Function getAvailabilityMessage(item) {
If (getAvailability(item)){
Var msg ="Username available";
}
Return msg;
}
A developer writes this code to return a message to user attempting to register a new
username. If the username is available, variable.
What is the return value of msg hen getAvailabilityMessage ("newUserName" ) is
executed and getAvailability("newUserName") returns false?
Answer: C
NEW QUESTION # 48
Which two console logs out NaN?
Choose 2 answers
Answer: B,D
NEW QUESTION # 49
Universal Containers (UC) notices that its application that allows users to search for accounts makes a network request each time a key is pressed. This results in too many requests for the server to handle.
* Address this problem, UC decides to implement a debounce function on string change handler.
What are three key steps to implement this debounce function?
Choose 3 answers:
Answer: A,B,D
NEW QUESTION # 50
......
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