JS-Dev-101–100% Free Certification Exam Dumps | New Salesforce Certified JavaScript Developer - Multiple Choice Exam Notes

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Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic	Details
Topic 1	Variables, Types, and Collections: Covers declaring and initializing variables, working with strings, numbers, dates, arrays, and JSON, along with understanding type coercion and truthy falsy evaluations.
Topic 2	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.
Topic 3	Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.
Topic 4	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 5	Asynchronous Programming: Covers asynchronous programming concepts and understanding how the event loop controls execution flow and determines outcomes.

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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q29-Q34):

NEW QUESTION # 29
What is the result of the code block?

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

Answer: B

NEW QUESTION # 30
refer to the exhibit.

Which code change should be done for the console to log the following when 'Click me!' is clicked' > Row log > Table log

A. Change line 10 to event.stopPropagation (false) ;
B. Remove line 10
C. Remove lines 13 and14
D. Change line 14 to elem.addEventListener ('click', printMessage, true);

Answer: B

NEW QUESTION # 31
A developer publishes a new version of a package with new features that do not break backward compatibility. The previous version number was 1.1.3.
Following semantic versioning formats, what should the new package version number be?

A. 2.0.0
B. 1.2.0
C. 1.1.4
D. 1.2.3

Answer: B

NEW QUESTION # 32
A developer is setting up a new Node.js server with a client library that is built using events and callbacks.
The library:
* Will establish a web socket connection and handle receipt of messages to theserver
* Will be imported with require, and made available with a variable called we.
The developer also wants to add error logging if a connection fails.
Given this info, which code segment shows the correct way to set up a client with two events that listen at execution time?

A. ws.connect (( ) => {console.log('connected to client'); }).catch((error) => { console.log('ERROR' , error); }};
B. try{ws.connect (( ) => {console.log('connected to client'); });} catch(error) { console.log('ERROR' ,error); };}
C. ws.on ('connect', ( ) => {console.log('connected to client'); ws.on('error', (error) => { console.log('ERROR' ,error); });}); C. ws.on ('connect', ( ) => { console.log('connected to client'); }}; ws.on('error', (error) => { console.log('ERROR' , error); }};

Answer: B

NEW QUESTION # 33
Which option is a core Node,js module?

A. Path
B. locate
C. Memory
D. Ios

Answer: A

NEW QUESTION # 34
......

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