Actual JavaScript-Developer-I Salesforce Certified JavaScript Developer (JS-Dev-101) Questions 2026

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q144-Q149):

NEW QUESTION # 144
At Universal Containers, every team has its own way of copying JavaScript objects. The
code
Snippet shows an implementation from one team:
Function Person() {
this.firstName = "John";
this.lastName = 'Doe';
This.name =() => (
console.log('Hello $(this.firstName) $(this.firstName)');
)}
Const john = new Person ();
Const dan = JSON.parse(JSON.stringify(john));
dan.firstName ='Dan';
dan.name();
What is the Output of the code execution?

A. TypeError: Assignment to constant variable.
B. TypeError: dan.name is not a function
C. Hello John DOe
D. Hello Dan Doe

Answer: B

NEW QUESTION # 145
Refer to the code below:

Which two statements correctly execute the runparallel () function?
Choose 2 answers

A. Async runParalled (). Then (data) :
B. runParallel () , then (function ) (date) { } 0;
C. runParralel () . then (data );
D. runParallel () , done (function ( data)(return data; }};

Answer: A,B

NEW QUESTION # 146
Given the following code:

is the output of line 02?

A. ''x''
B. ''null'''
C. ''undefined''
D. ''object''

Answer: D

NEW QUESTION # 147
Refer to the code below:

A developer uses a client that makes a GET request that uses a promise to handle the request, getRequest returns a promise.
Which code modification can the developer make to gracefully handle an error?
A)

B)

C)

D)

A. Option B
B. Option C
C. Option A
D. Option D

Answer: C

NEW QUESTION # 148
Which three statements are true about promises ?
Choose 3 answers

A. A settled promise can become resolved.
B. A fulfilled or rejected promise will not change states .
C. A pending promise can become fulfilled, settled, or rejected.
D. A Promise has a .then() method.
E. The executor of a new Promise runs automatically.

Answer: B,C,D

NEW QUESTION # 149
......

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