Authentic Salesforce JavaScript-Developer-I Exam Dumps PDF - Dec-2025 Updated
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Salesforce JavaScript-Developer-I exam consists of 60 multiple-choice questions that need to be completed in 105 minutes. JavaScript-Developer-I exam covers a range of topics, including JavaScript programming concepts, object-oriented programming, debugging and testing, and integrating with Salesforce. To prepare for the exam, candidates can take the official Salesforce training course, review the official exam guide, and practice with sample questions and exams. Passing the exam requires a minimum score of 65%, and the exam fee is $200 USD.
NEW QUESTION # 18
Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as (3, 4, 5)?
Choose 3 answers
- A. Let x = arr.aplice (2, 3);
- B. Let x = arr. Slince (2, 3);
- C. Let x = arr.filter( (a) => ( a < 2)) ;
- D. Let x = arr.filter( (a) => )return a > 2 )) ;
- E. Let x = arr.alice (2) ;
Answer: A,D,E
NEW QUESTION # 19
Given the code below.
What is logged to the console?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 20
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 A
- B. Option C
- C. Option B
- D. Option D
Answer: A
NEW QUESTION # 21
A developer is leading the creating of a new browser application that will server a single page application. The team wants to use a new web framework Minialist.js. The lead developer wants to advocate for a more seasoned wen framework that already has a community around it.
Which two frameworks should the load developer advocate for?
- A. Koa
- B. Vue
- C. Express
- D. Angular
Answer: C,D
NEW QUESTION # 22
A developer is trying to handle an error within a function.
Which code segment shows the correct approach to handle an error without propagating it elsewhere?
A)
B)
C)
D)
- A. Option C
- B. Option D
- C. Option B
- D. Option A
Answer: B
NEW QUESTION # 23
A developer wrote a fizzbuzz function that when passed in a number, returns the following:
Fizz if the number is divisible by 3.
Buzz if the number is divisible by 5.
Fizzbuzz if the number is divisible by both 3 and 5.
Empty string if the number is divisible by neither 3 or 5.
Which two test cases will properly test scenarios for the fizzbuss function?
- A. Let res = fizzbuss (Infinity);
Console.assert (res === '' ) ; - B. Let res = fizzbuss (5) ;
Console. assert (res === '' ) ; - C. Let res = fizzbuss (3) ;
Console.assert (res === 'buzz' ) ; - D. Let res = fizzbuss (15) ;
Console. assert (res === 'fizzbuzz' ) ;
Answer: A,D
NEW QUESTION # 24
The developer has a function that prints ''Hello'' to an input name. To test this, the developer created a function that returns world''.
What can the developer do to change the code to print ''Hello world''?
- A. Change line 5 to function world () (
- B. Change line 9 to sayhello (world () ;
- C. Change line 2 to console.log ( 'Hello', name () );
- D. Change line 7 to ) () ;
Answer: D
NEW QUESTION # 25
Given the code below:
Const copy = JSON.stringify((new String ('false') , new Bolean(false) undefined)); What is the value of copy?
- A. -- [\''false\'', false, null]" "
- B. -- [\''false\", ()""
- C. --[ false, ()]-
- D. -- [ \'false\'', false, undefined]'' ''
Answer: A
NEW QUESTION # 26
A Developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three number in the array, The test passes:
Let res = sum2([1, 2, 3 ]) ;
console.assert(res === 6 );
Res = sum3([ 1, 2, 3, 4]);
console.assert(res=== 6);
A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array. The test passes:
Which two results occur when running the test on the updated sum3 function ?
Choose 2 answers
- A. The line 02 assertion fails
- B. The line 05 assertion fails.
- C. The line 05 assertion passes.
- D. The line 02 assertion passes.
Answer: B,D
NEW QUESTION # 27
Given the following code:
is the output of line 02?
- A. ''undefined''
- B. ''null'''
- C. ''object''
- D. ''x''
Answer: C
NEW QUESTION # 28
Which function should a developer use to repeatedly execute code at a fixed time interval?
- A. setInterval
- B. setInterim
- C. setPeriod
- D. setTimeout
Answer: A
NEW QUESTION # 29
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
A)
B)
C)
D)
- A. Option A
- B. Option C
- C. Option B
- D. Option D
Answer: A
NEW QUESTION # 30
A class was written to represent items for purchase in an online store, and a second class representing items that are on sale at a discounted price. The constructor sets the name to the first value passed in. The pseudocode is below:
There is a new requirement for a developer to implement a description method that will retrun a brief description for item and saleitem.
What is the out when executing the code above?
- A. This is a Scarf
Unicaught TypeError: saleitem, description is not a function
This is a Scarf
This is a discounted Shirt - B. This is a Scarf
This is a Shirt
This is a Scarf
This is a discounted Shirt - C. This is a Scaf
Uncaught TypeError: saleItem, description is not a function
This is a Shirt
This is a discounted Shirt - D. This is a Scarf
This is a Shirt
This is a discounted Scard
This is a discounted Shirt
Answer: B
NEW QUESTION # 31
Refer the following code
what is the value of array after code executes?
- A. [ 1, 2, 3, 5 ]
Answer: A
NEW QUESTION # 32
A developer initiates a server with the file server,js and adds dependencies in the source codes package,json that are required to run the server.
Which command should the developer run to start the server locally?
- A. npm start server,js
- B. npm start
- C. start server,js
- D. node start
Answer: B
NEW QUESTION # 33
A developer has an ErrorMandler module that contains multiple functions.
What kind of export should be leveraged so that multiple function can be used?
- A. All
- B. Multi
- C. default
- D. Named
Answer: D
NEW QUESTION # 34
A developer copied a JavaScript object:
How does the developer access dan's forstName,lastName? Choose 2 answers
- A. dan,name ( )
- B. dan,firstname ( ) + dan, lastName ( )
- C. dan,name
- D. dan, firstName = dan.lastName
Answer: A,D
NEW QUESTION # 35
Refer to the following code:
Which statement should be added to line 09 for the code to display. The boat has a capacity of 10 people?
- A. this.size = size;
- B. super.size = size;
- C. super (size);
- D. ship.size size;
Answer: A
NEW QUESTION # 36
......
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