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Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic	Details
Topic 1	Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.
Topic 2	Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.
Topic 3	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 4	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.

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Updated JS-Dev-101 Testkings & JS-Dev-101 Latest Exam Duration

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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q36-Q41):

NEW QUESTION # 36
A developer implements and calls the following code when an application state change occurs:
Const onStateChange =innerPageState) => {
window.history.pushState(newPageState, ' ', null);
}
If the back button is clicked after this method is executed, what can a developer expect?

A. A popstate event is fired with a state property that details the application's last state.
B. A navigate event is fired with a state property that details the previous application state.
C. The page isnavigated away from and the previous page in the browser's history is loaded.
D. The page reloads and all Javascript is reinitialized.

Answer: C

NEW QUESTION # 37
What is the result of the code block?

A. The console logs 'flag' and then an error is thrown.
B. An error is thrown.
C. The console logs 'flag' and another flag.
D. The console logs only 'flag'.

Answer: D

NEW QUESTION # 38
developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.
Given the code and the information thedeveloper has, which code logs an error at boost with an event?

A. Server.on ('error', (error) => {console.log('ERROR', error);});
B. Server.catch ((server) => {console.log('ERROR', error);});
C. Server.error ((server) => {console.log('ERROR', error);});
D. Try{server.start();} catch(error) {console.log('ERROR', error);}

Answer: A

NEW QUESTION # 39
developer wants to use a module named universalContainersLib and them callfunctions from it.
How should a developer import every function from the module and then call the functions foo and bar ?

A. import * from '/path/universalContaineraLib.js';universalContainersLib.foo();universalContainersLib.bar();
B. import (foo, bar) from '/path/universalContainersLib.js';foo();bar();
C. import * ad lib from '/path/universalContainersLib.js';lib.foo();lib.bar();
D. import all from '/path/universalContaineraLib.js';universalContainersLib.foo();universalContainersLib.bar();

Answer: C

NEW QUESTION # 40
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:

A. Store the timeId of the setTimeout last enqueued by the search string change handle.
B. Ensure that the network request has the property debounce set to true.
C. If there is an existing setTimeout and the search string changes, cancel the existingsetTimeout using thepersisted timerId and replace it with a new setTimeout.
D. When thesearch string changes, enqueue the request within a setTimeout.
E. If there is an existing setTimeout and the search string change, allow the existingsetTimeout to finish, and do not enqueue a new setTimeout.

Answer: B,D,E

NEW QUESTION # 41
......

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