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The Salesforce JavaScript-Developer-I exam consists of 60 multiple-choice questions that are designed to test your knowledge of JavaScript concepts, as well as your ability to apply those concepts in a Salesforce environment. JavaScript-Developer-I exam is timed and you will have 105 minutes to complete it. To pass the exam, you will need to score at least 68% or higher.
The Salesforce Certified JavaScript Developer I Exam certification exam comprises 60 multiple-choice questions that must be completed in 105 minutes. JavaScript-Developer-I exam is available in both English and Japanese languages, and the passing score is 68%. Candidates who pass the JavaScript-Developer-I Certification Exam will receive a Salesforce Certified JavaScript Developer I credential. Salesforce Certified JavaScript Developer I Exam certification is valid for two years, after which the candidate must pass the exam again to maintain their certification status.
How to Study the Salesforce JavaScript-Developer-I Exam
The best study material one can get is the JavaScript-Developer-I practice exam dumps. To ensure good grades, do attempt the JavaScript-Developer-I practice exams. The JavaScript Developer I from Salesforce typically has 1-2 years of experience as a JavaScript developer with the following JavaScript topics.
Asynchronous Programming
Scope of Variables
Item Model Document
JavaScript on the backend
Discharge
Classes
Strings
Monitor (agnostic platform)
Functions (more functions in higher order)
Modules
Objects & Arrays: Data Structures
To prepare for this test, we advise a combination of practical experience, completion of training courses, pathways and self-study in the areas listed in the examination outline section of this examination guide.
NEW QUESTION # 112
Refer to the following code:
What is the output of line 11?
- A. ["bar", "foo"]
- B. ["foo", "bar"]
- C. [1,2]
- D. ["foo:1", "bar:2"]
Answer: B
NEW QUESTION # 113
Refer to the code below:
What is the output of this function when called with an empty array?
- A. Return 0
- B. Return 5
- C. Return Infinity
- D. Return NaN
Answer: B
NEW QUESTION # 114
Refer to the code below:
01 const exec = (item, delay) =>{
02 new Promise(resolve => setTimeout( () => resolve(item), delay)),
03 async function runParallel() {
04 Const (result1, result2, result3) = await Promise.all{
05 [exec ('x', '100') , exec('y', 500), exec('z', '100')]
06 );
07 return `parallel is done: $(result1) $(result2)$(result3)`;
08 }
}
}
Which two statements correctly execute the runParallel () function?
Choose 2 answers
- A. runParallel ( ). done(function(data){
return data;
}); - B. runParallel () .then(data);
- C. runParallel () .then(function(data)
return data - D. Async runParallel () .then(data);
Answer: A,C
NEW QUESTION # 115
Refer to the following object.
How can a developer access the fullName property for dog?
- A. Dog.fullName
- B. Dog, get, fullName
- C. Dog, function, fullName
- D. Dog.fullName ( )
Answer: A
NEW QUESTION # 116
Refer to following code:
class Vehicle {
constructor(plate) {
This.plate =plate;
}
}
Class Truck extends Vehicle {
constructor(plate, weight) {
//Missing code
This.weight = weight;
}
displayWeight() {
console.log('The truck ${this.plate} has a weight of ${this.weight} lb.');}}
Let myTruck = new Truck('123AB', 5000);
myTruck.displayWeight();
Which statement should be added to line 09 for the code to display 'The truck 123AB has a
weight of 5000lb.'?
- A. super(plate);
- B. Super.plate =plate;
- C. This.plate =plate;
- D. Vehicle.plate = plate;
Answer: A
NEW QUESTION # 117
developer wants to use a module nameduniversalContainersLib and them callfunctions from it.
How should a developer import every function from the module and then call the functions foo and bar ?
- A. import * ad lib from '/path/universalContainersLib.js';lib.foo();lib.bar();
- B. import all from
'/path/universalContaineraLib.js';universalContainersLib.foo();universalContainersLib.bar(); - C. import (foo,bar) from '/path/universalContainersLib.js';foo();bar();
- D. import * from
'/path/universalContaineraLib.js';universalContainersLib.foo();universalContainersLib.bar();
Answer: A
NEW QUESTION # 118
Given the code below:
What happens when the code executes?
- A. The ur1 variables has local scope and line 02 throws an error.
- B. The ur1 variable has local scope and line 02 executes correctly.
- C. The ur1 variable has global scope and line 02 throws an error.
- D. The ur1 variable has global scope and line 02 executes correctly.
Answer: D
NEW QUESTION # 119
Refer to the code below:
Which value can a developer expect when referencing country,capital,cityString?
- A. An error
- B. 'London'
- C. 'NaN'
- D. undefined
Answer: C
NEW QUESTION # 120
Refer to the code below:
Which value can a developer expect when referencing country,capital,cityString?
- A. An error
- B. 'London'
- C. 'NaN'
- D. undefined
Answer: C
NEW QUESTION # 121
A developer is debugging a web server that uses Node.js The server hits a runtimeerror
every third request to an important endpoint on the web server.
The developer added a break point to the start script, that is at index.js at he root of the
server's source code. The developer wants to make use of chrome DevTools to debug.
Which command can be run to access DevTools and make sure the breakdown is hit ?
- A. node -i index.js
- B. Node --inspect index.js
- C. Node --inspect-brk index.js
- D. Node inspect index.js
Answer: B
NEW QUESTION # 122
Refer to the following code:
What is the output of line 11?
- A. ["bar", "foo"]
- B. ["foo", "bar"]
- C. [1,2]
- D. ["foo:1", "bar:2"]
Answer: B
NEW QUESTION # 123
Given the following code:
Let x =('15' + 10)*2;
What is the value of a?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 124
Refer to code below:
Const objBook = {
Title: 'Javascript',
};
Object.preventExtensions(objBook);
Const newObjBook = objBook;
newObjectBook.author ='Robert';
What are the values of objBook and newObjBook respectively ?
- A. {author: "Robert"}{author: "Robert", title: "javaScript}
- B. [title: "javaScript"] [title: "javaScript"]
- C. {author: "Robert", title: "javaScript}Undefined
- D. {author: "Robert", title: "javaScript}{author: "Robert", title: "javaScript}
Answer: B
NEW QUESTION # 125
Refer to the code:
Given the code above, which three properties are set for pet1? Choose 3 answers
- A. size
- B. type
- C. owner
- D. canTalk
- E. name
Answer: A,B,D
NEW QUESTION # 126
A developer creates a generic function to log custom messages in the console. To do this,
the function below is implemented.
01 function logStatus(status){
02 console./*Answer goes here*/{'Item status is: %s', status};
03 }
Which three console logging methods allow the use of string substitution in line 02?
- A. Info
- B. Assert
- C. Log
- D. Error
- E. Message
Answer: A,B,C
NEW QUESTION # 127
Refer to the code snippet below:
Let array = [1, 2, 3, 4, 4, 5, 4, 4];
For (let i =0; i < array.length; i++)
if (array[i] === 4) {
array.splice(i, 1);
}
}
What is the value of array after the code executes?
- A. [1, 2, 3, 4, 5, 4, 4]
- B. [1, 2, 3, 5]
- C. [1, 2, 3, 4, 4, 5, 4]
- D. [1, 2, 3, 4, 5, 4]
Answer: C
Explanation:
NEW QUESTION # 128
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