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Free PDF Quiz JavaScript-Developer-I - Marvelous Vce Salesforce Certified JavaScript Developer I Exam Test Simulator

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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q134-Q139):

NEW QUESTION # 134
Refer to the code below:
let car1 = new Promise((_ ,reject)=> setTimeout(reject,2000,"Car1 crashed in")); let car2 = new Promise(resolve => setTimeout(resolve,1500,"Car2 completed")); let car3 = new Promise(resolve => setTimeout(resolve,3000,"Car3 completed")); Promise.race([car1,car2,car3])
.then(value=>{
let result = `${value} the race.`;
}).catch(err=>{
console.log('Race is cancelled.',err);
});
What is the value of result when promise.race execues?

A. Car2 completed the race.

Answer: A

NEW QUESTION # 135
Refer to the code below:
console.log(''start);
Promise.resolve('Success') .then(function(value){
console.log('Success');
});
console.log('End');
What is the output after the code executes successfully?

A. Start
Success
End
B. End
Start
Success
C. Start
End
Success
D. Success
Start
End

Answer: C

NEW QUESTION # 136
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

Answer: A

NEW QUESTION # 137
Refer to the code below:
new Promise((resolve, reject) => {
const fraction = Math.random();
if( fraction >0.5) reject("fraction > 0.5, " + fraction);
resolve(fraction);
})
.then(() =>console.log("resolved"))
.catch((error) => console.error(error))
.finally(() => console.log(" when am I called?"));

When does Promise.finally on line 08 get called?

A. When rejected
B. When resolved and settled
C. When resolved or rejected
D. WHen resolved

Answer: C

NEW QUESTION # 138
A team that works on a big project uses npm to deal with projects dependencies.
A developer added a dependency does not get downloaded when they execute npm install.
Which two reasons could be possible explanations for this?
Choose 2 answers

A. The developer added the dependency as a dev dependency, and NODE_ENV is set to production.
B. The developer missed the option --add when adding the dependency.
C. The developer added the dependency as a dev dependency, and NODE_ENV Is set to production.
D. The developer missed the option --save when adding the dependency.

Answer: A,C,D

NEW QUESTION # 139
......

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