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Salesforce JavaScript-Developer-I Certification Exam is designed to test a developer's knowledge and skills in using JavaScript with the Salesforce platform. Salesforce Certified JavaScript Developer (JS-Dev-101) certification is ideal for developers who want to demonstrate their ability to develop custom applications using JavaScript and the Salesforce Lightning platform.

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q90-Q95):

NEW QUESTION # 90
At Universal Containers, every team has its own way of copying JavaScript objects. The code snippet shows an Implementation from one team:

What is the output of the code execution?

A. Hello Dan Doe
B. SyntaxError: Unexpected token in JSON
C. Hello John Doe
D. Hello Dan

Answer: B

NEW QUESTION # 91
A developer has a server running with Node.js. the command to start the web server is node server.js. the server started having latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround.
Which command can the web developer run to see what the module is doing during the latency period?

A. NODE_DEBUO=http, https node server,js
B. DEBUO=true node server,js
C. DEBUO=http, https node server,js
D. NODE_DEBUO=true node server,js

Answer: C

NEW QUESTION # 92
Refer to the code below:
Const searchTest = 'Yay! Salesforce is amazing!" ;
Let result1 = searchText.search(/sales/i);
Let result 21 = searchText.search(/sales/i);
console.log(result1);
console.log(result2);
After running this code, which result is displayed on the console?

A. > 5 >undefined
B. > 5 > -1
C. > true > false
D. > 5 > 0

Answer: A

Explanation:

NEW QUESTION # 93
A developer has 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 nor 5.
Which two test cases properly test scenarios for the fizzbuzz function?

A. let res = fizzbuzz(Infinity);
console.assert(res === ' ' );
B. let res = fizzbuzz(NaN);
console.assert(isNaN(res));
C. let res = fizzbuzz(3);
console.assert(res === ' buzz ' );
D. let res = fizzbuzz(15);
console.assert(res === ' fizzbuzz ' );

Answer: A,D

Explanation:
The correct answers are B and D .
A strong test case checks whether the actual output matches the expected behavior of the function.
For Option B :
let res = fizzbuzz(15);
console.assert(res === ' fizzbuzz ' );
The number 15 is divisible by both 3 and 5:
15 % 3 === 0
15 % 5 === 0
So the correct return value is:
' fizzbuzz '
That makes option B a valid test.
For Option D :
let res = fizzbuzz(Infinity);
console.assert(res === ' ' );
Infinity is not a normal finite divisible number. In JavaScript:
Infinity % 3
Infinity % 5
produce NaN, and comparisons such as:
Infinity % 3 === 0
are false.
So a typical fizzbuzz implementation would not treat Infinity as divisible by 3 or 5, meaning it should return:
' '
That makes option D a valid test for the "neither divisible by 3 nor 5" path.
Now compare the incorrect options:
Option A is wrong because:
fizzbuzz(3)
should return:
' fizz '
not:
' buzz '
Option C is wrong because the function specification says the function returns strings such as ' fizz ' , ' buzz '
, ' fizzbuzz ' , or ' ' . It does not say the function returns numeric NaN.
So this assertion is not appropriate:
console.assert(isNaN(res));
Therefore, the verified answers are B and D .

NEW QUESTION # 94
Given the code below:

What is logged to the console?

A. 2 1 4 3 5
B. 2 5 1 3 4
C. 1 2 5 3 4
D. 1 2 4 3 5

Answer: B

NEW QUESTION # 95
......

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