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Exam overview

Salesforce Certified JavaScript Developer (JS-Dev-101) Exam Dumps

Vendor

Salesforce

Exam Code

(JS-Dev-101)

Actual Exam Duration

 105 Minutes

TOTAL QUESTIONS

219

Exam Name

 Salesforce Certified JavaScript Developer

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Exam practice

Exam Q&A

Select an option, then click Show Answer.

Q1:

Refer to the string below: const str = ‘Salesforce’; Which two statements result in the word ‘Sales’?

A: str.substr(1, 5);

B: str.substr (0, 5);

C: str.substring (1, 5);

D: str.substring (0, 5);

Correct Answer: B, D

Q2:

GIven a value, which three options can a developer use to detect if thevalue is NaN? Choose 3 answers !

A: value == NaN

B: Object.is(value, NaN)

C: value === Number.NaN

D: value ! == value

E: Number.isNaN(value)

Answer: A,E

Q3:

A developer has the following array of hourly wages: Let arr = (8, 5, 9, 75, 11, 25, 7, 75, , 13, 25); For workers making less than $10 an hour rate should be multiple by 1.25 and returned in a new array. How should the developer implement the request?

A: let arrl = arr.filter((val) => val num = 1.25);

B: let arrl = arr .rr.acArray ((val) => ( val { num * 1.25 ));

C: let arrl = arr-map((num) => { return ran * 1.25 }).filter((val) -> { return val < 10));

D: let arrl = arr.filterBy((val) => val < 10 ).aapBy num = ..25 );

Answer: C

Q4:

A developer wants to define a function log to be used a few times on a single-file JavaScript script. 01 // Line 1 replacement 02 console.log(‘”LOG:’, logInput); 03 } Which two options can correctly replaceline 01 and declare the function for use? Choose 2 answers

A: function leg(logInput) {

B: const log(loginInput) {

C: const log = (logInput) => {

D: function log = (logInput) {

Answer: A,C

Q5:

Given the code below: FunctionmyFunction(){ A =5; Var b =1; } myFunction(); console.log(a); console.log(b); What is the expected output?

A: Both lines 08 and 09 are executed, and the variables are outputted.

B: Line 08 outputs the variable, but line 09 throws an error.

C: Line 08thrones an error, therefore line 09 is never executed.

D: Both lines 08 and 09 are executed, but values outputted are undefined.

Answer: B

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