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Salesforce JS-Dev-101 Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer - Multiple Choice
Exam Number:	JS-Dev-101
Available Languages:	English, Japanese
Exam Duration:	105 minutes
Real Exam Qty:	60 scored + up to 5 unscored
Exam Format:	Multiple select, Multiple choice
Exam Price:	USD 200
Passing Score:	65%
Certificate Validity Period:	Does not expire; requires maintenance updates
Related Certifications:	Salesforce Certified Developer Salesforce Certified Platform Developer I
Recommended Training:	Trailhead JavaScript Developer I Certification Prep
Exam Registration:	Salesforce Certification Registration
Sample Questions:	Salesforce JS-Dev-101 Sample Questions
Exam Way:	Online proctored or onsite at authorized testing centers
Pre Condition:	No formal prerequisites; recommended: strong JavaScript fundamentals, ES6+ experience, web development familiarity
Official Syllabus URL:	https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101

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Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic	Details
Topic 1	Asynchronous Programming: Covers asynchronous programming concepts and understanding how the event loop controls execution flow and determines outcomes.
Topic 2	Objects, Functions, and Classes: Covers function, object, and class implementations to meet business requirements, along with the use of modules, decorators, variable scope, and execution flow.
Topic 3	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 4	Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.
Topic 5	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.

Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q103-Q108):

NEW QUESTION # 103
Given the code below:
01 function Person(name, email) {
02 this.name = name;
03 this.email = email;
04 }
05
06 const john = new Person('John', 'john@email.com');
07 const jane = new Person('Jane', 'jane@email.com');
08 const emily = new Person('Emily', 'emily@email.com');
09
10 let usersList = [john, jane, emily];
Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?

A. console.group(usersList);
B. console.info(usersList);
C. console.table(usersList);
D. console.groupCollapsed(usersList);

Answer: C

Explanation:
We have an array of plain objects:
[
{ name: 'John', email: 'john@email.com' },
{ name: 'Jane', email: 'jane@email.com' },
{ name: 'Emily', email: 'emily@email.com' }
]
We want:
A "visual representation" of the list.
Ability to sort by name or email in DevTools.
console.table:
console.table(data) renders data as a table in most browser devtools and Node consoles that support it.
Each object becomes a row; properties (name, email) become columns.
Many DevTools UIs allow:
Clicking column headers to sort by that column.
Filtering / viewing in a structured way.
So:
console.table(usersList);
Displays a sortable table of users by name or email. This matches the requirement exactly.
Other options:
console.group(usersList);
Starts a console group. The argument is just logged as a line label.
It does not create a table or sortable view; it just groups subsequent logs.
console.groupCollapsed(usersList);
Same grouping behavior, but collapsed by default.
Again, no table or sortable columns.
console.info(usersList);
Logs the array in the console, but as a standard log/info.
You can expand objects, but there is no table view or built-in column sorting.
Therefore, the correct method is:
Answe r: A
Study Guide / Concept Reference (no links):
console.table for tabular logging
console.group and console.groupCollapsed for grouped logs
console.log / console.info standard logging behavior
DevTools UI support for sorting columns in console.table

NEW QUESTION # 104
In which situation should a developer include a try .. catch block around their function call ?

A. The function results in an out of memory issue.
B. The function contains scheduled code.
C. The function has an error that should not be silenced.
D. The function might raise a runtime error that needs to be handled.

Answer: D

NEW QUESTION # 105
Refer to the following object.

How can a developer access the fullName property for dog?

A. Dog, get,fullName
B. Dog.fullName ( )
C. Dog.fullName
D. Dog, function, fullName

Answer: C

NEW QUESTION # 106
A developer wrote the following code:
01 let X = object.value;
02
03 try {
04 handleObjectValue(X);
05 } catch (error) {
06 handleError(error);
07 }
Thedeveloper has a getNextValue function to execute after handleObjectValue(), but does not want to execute getNextValue() if an error occurs.
How can the developer change the code to ensure this behavior?

A. 03 try{04 handleObjectValue(x);05 } catch(error){06 handleError(error);07 }08 getNextValue();
B. 03 try{04 handleObjectValue(x);05 } catch(error){06 handleError(error);07 } finally {08 getNextValue();10 }
C. 03 try{04 handleObjectValue(x);05 }catch(error){06 handleError(error);07 } then {08 getNextValue();09 }
D. 03 try {04 handleObjectValue(x)05 ........................

Answer: D

NEW QUESTION # 107
Referto the following code:

Which two statement could be inserted at line 17 to enable the function call on line 18? Choose 2 answers

A. Object.assign (leo, tony);
B. Object.assign (leo. Tiger);
C. leo.prototype.roar = ( ) =>( console.log('They\'re pretty good!'); };
D. leo.roar = () => { console.log('They\'re pretty good!'); );

Answer: A,D

NEW QUESTION # 108
......

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