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Salesforce JavaScript-Developer-I certification exam is a multiple-choice exam that measures the candidate's knowledge of JavaScript development principles, best practices, and techniques specific to the Salesforce platform. JavaScript-Developer-I exam consists of 60 multiple-choice questions, and candidates have 105 minutes to complete it. JavaScript-Developer-I Exam is available in English and Japanese and can be taken online or in-person at a proctored testing center.

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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q136-Q141):

NEW QUESTION # 136
Refer to 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. Tiger);
B. Object.assign (leo, tony);
C. leo.roar = () => { console.log('They're pretty good!'); );
D. leo.prototype.roar = ( ) =>( console.log('They're pretty good!'); };

Answer: B,C

NEW QUESTION # 137
A test has a dependency on database. query. During the test, the dependency is replaced with an object called database with the method, Calculator query, that returns an array. The developer does not need to verify how many times the method has been called.
Which two test approaches describe the requirement?
Choose 2 answers

A. Substitution
B. Black box
C. White box
D. Stubbing

Answer: A,C

NEW QUESTION # 138
Given the code below:
Function myFunction(){
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. Both lines 08 and 09 are executed, but values outputted are undefined.
C. Line 08 thrones an error, therefore line 09 is never executed.
D. Line 08 outputs the variable, but line 09 throws an error.

Answer: D

NEW QUESTION # 139
A developer writes the code below to calculate the factorial of a given number.

What is the result of executing line 04?

A. 0
B. RuntimeError
C. 1
D. -Infinity

Answer: B

NEW QUESTION # 140
Refer to the following code:
Let sampletext = 'The quick brown fox Jumps';
A developer need to determine if a certain substring is part of a string.
Which three expressions return true for the give substring? Choose 3 answers

A. sampleText.inclides (fox');
B. sampleText.indexof ('quick') 1== -1;
C. sampleText.includes (quick', 4);
D. sampleText.includes (fox' , 3);
E. sampleText.substing ('fox');

Answer: D

NEW QUESTION # 141
......

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