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| Section | Objectives |
|---|---|
| Asynchronous JavaScript | - Error handling in async workflows - Event loop and concurrency model - Promises and async/await |
| Testing and Debugging | - Debugging techniques and tools - Unit testing principles |
| JavaScript Language Fundamentals | - Functions, scope, and closures - Data types, variables, and operators - ES6+ syntax and features |
| Browser and DOM Interaction | - Event handling and propagation - Browser APIs (fetch, storage, timers) - DOM manipulation and traversal |
| Salesforce Platform Integration | - Calling Apex methods from JavaScript - Security considerations in Salesforce JavaScript - Lightning Web Components (LWC) JavaScript usage |
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NEW QUESTION # 115
Which statement accurately describes an aspect of promises?
Answer: B
NEW QUESTION # 116
A developer wants to use a try...catch statement to catch any error that countSheep () may throw and pass it to a handleError () function.
What is the correct implementation of the try...catch?
Answer: B
NEW QUESTION # 117
Refer to the code below:
const event = new CustomEvent(
//Missing Code
);
obj.dispatchEvent(event);
A developer needs to dispatch a custom event called update to send information about recordId.
Which two options could a developer insert at the placeholder in line 02 to achieve this?
Choose 2 answers
Answer: A,B
Explanation:
}
}
NEW QUESTION # 118
Refer to the code below:
Considering that JavaScript is single-threaded, what is the output of line 08 after the code executes?
Answer: B
NEW QUESTION # 119
Refer to the code below:
Let searchString = ' Look for this ';
Which two options remove the whitespace from the beginning of searchString? Choose 2 answers
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