Latest PDF of Javascript-Developer-I: Salesforce Certified JavaScript Developer I

Salesforce Certified JavaScript Developer I Practice Test

Javascript-Developer-I exam Format | Course Contents | Course Outline | exam Syllabus | exam Objectives

Exam Details for Javascript-Developer-I Salesforce Certified JavaScript Developer I:

Exam Specification:
- Number of Questions: The exam typically consists of multiple-choice questions, with a total of approximately 60 questions.
- Time Limit: The total time allocated for the exam is usually 90 minutes.
- Passing Score: The passing score for the exam varies, but it is generally set around 65% or higher.
- exam Format: The exam is usually conducted in a proctored environment, either in-person or online.

Course Outline:

The Salesforce Certified JavaScript Developer I course covers the following key areas:

1. Introduction to JavaScript:
- JavaScript basics, syntax, and data types
- Variables, operators, and control structures
- Functions, arrays, and objects in JavaScript
- Working with DOM (Document Object Model)
- Handling events and event-driven programming

2. JavaScript in Salesforce:
- Overview of JavaScript in the Salesforce platform
- JavaScript buttons and links in Salesforce
- Customizing page layouts using JavaScript
- Client-side validation and form manipulation
- Working with Visualforce pages and components

3. Advanced JavaScript Concepts:
- Error handling and debugging techniques
- Asynchronous programming with JavaScript (promises, async/await)
- Manipulating JSON data and working with APIs
- JavaScript frameworks and libraries (e.g., jQuery, Angular, React)
- Performance optimization and best practices

4. Security and Governance:
- JavaScript security considerations
- Preventing common vulnerabilities (e.g., Cross-Site Scripting)
- Accessing Salesforce data securely with JavaScript
- Implementing security policies and practices

Exam Objectives:

The objectives of the Javascript-Developer-I exam are to assess the candidate's understanding of the following:

1. JavaScript fundamentals and syntax.
2. JavaScript usage in the Salesforce platform.
3. Advanced JavaScript concepts and techniques.
4. JavaScript security considerations.
5. Best practices for JavaScript development in Salesforce.

Exam Syllabus:

The exam syllabus for Javascript-Developer-I includes the following topics:

1. Introduction to JavaScript
2. JavaScript in Salesforce
3. Advanced JavaScript Concepts
4. Security and Governance

100% Money Back Pass Guarantee

Javascript-Developer-I PDF demo Questions

Javascript-Developer-I demo Questions

Javascript-Developer-I Dumps Javascript-Developer-I Braindumps Javascript-Developer-I braindump questions Javascript-Developer-I practice exam Javascript-Developer-I actual Questions
SalesForce
Javascript-Developer-I
Salesforce Certified JavaScript Developer I
https://killexams.com/pass4sure/exam-detail/Javascript-Developer-I
Question: 1
Which three statements are true about promises? Choose 3 answers
1. The executor of a new Promise runs automatically.
2. A Promise has a .then() method.
3. A fulfilled or rejected promise will not change states .
4. A settled promise can become resolved.
5. A pending promise can become fulfilled, settled, or rejected.
Answer: B,C,E
Question: 2
bar, awesome is a popular JavaScript module. the versions publish to npm are:
Teams at Universal Containers use this module in a number of projects. A particular project has the package, json definition below.
A developer runs this command: npm install. Which version of bar .awesome is installed?
A. 1.3.1
B. 1.3.5
C. The command fails, because version 130 is not found D. 1.4.0
Answer: B
Question: 3
A test has a dependency on database.query. During the test the dependency is replaced with an object called database with the method, query, that returns an array. The developer needs to verify how many times the method was called
and the arguments used each time.
Which two test approaches describe the requirement? Choose 2 answers
1. Integration
2. Black box
3. White box
4. Mocking
Answer: C,D
Question: 4
Refer to the code below: Let str = �javascript�; Str[0] = �J�;
Str[4] = �S�;
After changing the string index values, the value of str is �javascript� . What is the reason for this value:
1. Non-primitive values are mutable.
2. Non-primitive values are immutable.
3. Primitive values are mutable.
4. Primitive values are immutable.
Answer: D
Question: 5
Refer to the code below: Const pi = 3.1415326, What is the data type of pi?
1. Double
2. Number
3. Decimal
4. Float
Answer: B
Question: 6
A developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three numbers in the array, and the test passes.
A different developer made changes to the behavior of sum3 to instead sum only the first two numbers present in the array.
Which two results occur when running this test on the updated sum3 function? Choose 2 answers
1. The line 05 assertion passes.
2. The line 02 assertion passes.
3. The line 02 assertion fails.
4. The line 05 assertion fails.
Answer: B,D
Question: 7
Question: 8
developer has a web server running with Node.js. The command to start the web server is node server,js. The web server started having latency issues. Instead of a one second turn around 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?
1. DEBUG = http, https node server.js
2. NODE_DEBUG =http, https node server.js
3. DEBUG =true node server.js
4. NODE_DEBUG =true node server.js
Answer: C
Question: 9
Question: 10
Question: 11
A developer has an ErrorHandler module that contains multiple functions. What kind of export be leverages so that multiple functions can be used?
1. Named
2. All
3. Multi
4. Default
Answer: A
Question: 12
Question: 13
Refer to HTML below:

The current status of an Order: In Progress

. Which JavaScript statement changes the text �In Progress� to �Completed�?
1. document.getElementById(�status�).Value = �Completed� ;
2. document.getElementById(�#status�).innerHTML = �Completed� ;
3. document.getElementById(�status�).innerHTML = �Completed� ;
4. document.getElementById(�.status�).innerHTML = �Completed� ;
Answer: C
Question: 14
The developer wants to test the array shown: const arr = Array(5).fill(0)
Which two tests are the most accurate for this array? Choose 2 answers:
1. console.assert( arr.length === 5 );
2. arr.forEach(elem => console.assert(elem === 0)) ;
3. console.assert(arr[0] === 0 && arr[ arr.length] === 0);
4. console.assert (arr.length >0);
Answer: A,B
Question: 15
Refer to the code below:
Line 05 causes an error.
What are the values of greeting and salutation once code completes?
1. Greeting is Hello and salutation is Hello, Hello.
2. Greeting is Goodbye and salutation is Hello, Hello.
3. Greeting is Goodbye and salutation is I say Hello.
4. Greeting is Hello and salutation is I say hello.
Answer: A
Question: 16
Which two console logs outputs NaN? Choose 2 answers
1. console.log(10/ Number(�5�));
2. console.log(parseInt(�two�));
3. console.log(10/ ��five);
4. console.log(10/0);
Answer: B,C
Question: 17
A developer wants to leverage a module to print a price in pretty format, and has imported a method as shown below: Import printPrice from �/path/PricePrettyPrint.js�;
Based on the code, what must be true about the printPrice function of the PricePrettyPrint module for this import to work?
1. printPrice must be be a named export
2. printPrice must be an all export
3. printPrice must be the default export
4. printPrice must be a multi exportc
Answer: C
Question: 18
The developer wants to test this code:
Const toNumber =(strOrNum) => strOrNum;
Which two tests are most accurate for this code? Choose 2 answers
1. console.assert(toNumber(�2�) === 2);
2. console.assert(Number.isNaN(toNumber()));
3. console.assert(toNumber(�-3�) < 0);
4. console.assert(toNumber () === NaN);
Answer: A,C
Question: 19
A developer creates an object where its properties should be immutable and prevent properties from being added or modified.
Which method should be used to execute this business requirement?
1. Object.const()
2. Object.eval()
3. Object.lock()
4. Object.freeze()
Answer: D
Question: 20
Refer to HTML below:

This card is smaller.

The width and height of this card is determined by its contents.

Which expression outputs the screen width of the element with the ID card-01?
1. document.getElementById(� card-01 �).getBoundingClientRest().width
2. document.getElementById(� card-01 �).style.width
3. document.getElementById(� card-01 �).width
4. document.getElementById(� card-01 �).innerHTM
5. lenght*e
Answer: A
Question: 21
A developer wrote 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 or 5.
Which two test cases will properly test scenarios for the fizzbuzz function? Choose 2 answers
1. let res = fizzbuzz(5); console.assert ( res === � � );
2. let res = fizzbuzz(15); console.assert ( res === � fizzbuzz � )
3. let res = fizzbuzz(Infinity); console.assert ( res === � � )
4. let res = fizzbuzz(3); console.assert ( res === � buzz � )
Answer: B,C,D
Question: 22
Question: 23
Question: 24
Why would a developer specify a package.jason as a developed forge instead of a dependency?
1. It is required by the application in production.
2. It is only needed for local development and testing.
3. Other required packages depend on it for development.
4. It should be bundled when the package is published.
Answer: B
Question: 25
Which three options show valid methods for creating a fat arrow function? Choose 3 answers
1. x => ( console.log(� executed �) ; )
2. [ ] => ( console.log(� executed �)
3. ( ) => ( console.log(� executed �)
4. X,y,z => ( console.log(� executed �)
5. (x,y,z) => ( console.log(� executed �)
Answer: A,E
Question: 26
Refer to the code below:
Let inArray =[ [ 1, 2 ] , [ 3, 4, 5 ] ];
Which two statements result in the array [1, 2, 3, 4, 5]? Choose 2 answers
1. [ ]. Concat.apply ([ ], inArray);
2. [ ]. Concat (� inArray);
3. [ ]. concat.apply(inArray, [ ]);
4. [ ]. concat ( [ �.inArray ] );
Answer: A,B Question: 27 Given code below:
setTimeout (() => ( console.log(1);
). 0);
console.log(2);
New Promise ((resolve, reject )) = > ( setTimeout(() => ( reject(console.log(3));
). 1000);
)).catch(() => ( console.log(4);
));
console.log(5);
What is logged to the console? A. 2 1 4 3 5
B. 2 5 1 3 4
C. 1 2 4 3 5
D. 1 2 5 3 4
Answer: B
Question: 28
Refer to code below: Let a =�a�;
Let b;
// b = a; console.log(b);
What is displayed when the code executes?
1. Reference Error: b is not defined
2. A
3. Undefined
4. Null
Answer: C
In the browser, the window object is often used to assign variables that require the broadest scope in an application Node.js application does not have access to the window object by default.
Which two methods are used to address this? Choose 2 answers
1. Use the document object instead of the window object.
2. Assign variables to the global object.
3. Create a new window object in the root file.
4. Assign variables to module.exports and require them as needed.
Answer: B
Question: 31
A developer has a web server running with Node.js. The command to start the web server is node server.js. The web 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?
1. NODE_DEBUG=true node server.js
2. DEBUG=http, https node server.js
3. NODE_DEBUG=http,https node server.js
4. DEBUG=true node server.js
Answer: D
Question: 32
Question: 33
A developer needs to test this function: 01 const sum3 = (arr) => (
1. if (!arr.length) return 0,
2. if (arr.length === 1) return arr[0],
3. if (arr.length === 2) return arr[0] + arr[1], 05 return arr[0] + arr[1] + arr[2],
06 );
Which two assert statements are valid tests for the function? Choose 2 answers
1. console.assert(sum3(1, �2�)) == 12);
2. console.assert(sum3(0)) == 0);
3. console.assert(sum3(-3, 2 )) == -1);
4. console.assert(sum3(�hello�, 2, 3, 4)) === NaN);
Answer: A,C
Question: 34
Question: 35
Refer to the code below: Let textValue = �1984�;
Which code assignment shows a correct way to convert this string to an integer?
1. let numberValue = Number(textValue);
2. Let numberValue = (Number)textValue;
3. Let numberValue = textValue.toInteger();
4. Let numberValue = Integer(textValue);
Answer: A
Question: 36
Given two expressions var1 and var2 .
What are two valid ways to return the logical AND of the two expressions and ensure it is data type Boolean? Choose 2 answers:
1. Boolean(var1 && var2)
2. var1 && var2
3. var1.toBoolean() && var2toBoolean()
4. Boolean(var1) && Boolean(var2)
Answer: A,D
Question: 37
Question: 38
Question: 39
Refer to the code below?
Let searchString = � look for this �;
Which two options remove the whitespace from the beginning of searchString? Choose 2 answers
1. searchString.trimEnd();
2. searchString.trimStart();
3. trimStart(searchString);
4. searchString.replace(/*ss*/, ��);
Answer: B,D
Refer to the code below:
Which value can a developer expect when referencing country,capital,city String?
1. �London�
2. undefined
3. An error
4. �NaN�
Answer: D
Question: 42
Question: 43
developer is trying to convince management that their team will benefit from using Node.js for a backend server that they are going to create. The server will be a web server that handles API requests from a website that the team has already built using HTML, CSS, and JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager? Choose 3 answers:
1. Installs with its own package manager to install and manage third-party libraries.
2. Ensures stability with one major release every few years.
3. Performs a static analysis on code before execution to look for runtime errors.
4. Executes server-side JavaScript code to avoid learning a new language.
5. User non blocking functionality for performant request handling .
Answer: A,C,E
Question: 44
Question: 45
Question: 46
Question: 47
True + 3 + �100� + null A. 104
1. 4100
2. �3100null�
3. �4100null�
Answer: D
Question: 48
Refer to code below:
Let productSKU = �8675309� ;
A developer has a requirement to generate SKU numbers that are always 19 characters lon, starting with �sku�, and padded with zeros.
Which statement assigns the values sku 0000000008675309?
1. productSKU = productSK
2. padStart (19. �0�).padstart(�sku�);
3. productSKU = productSK
4. padEnd (16. �0�).padstart(�sku�);
5. productSKU = productSK
6. padEnd (16. �0�).padstart(19, �sku�);
7. productSKU = productSK
8. padStart (16. �0�).padstart(19, �sku�);
Answer: D
Question: 49
Question: 50
Question: 51
Question: 52
Question: 53
Refer of the string below: Const str = �sa;esforce�=;
Which two statement result in the word �Sale�? Choose 2 answers
1. str, substring (0,5) ;
2. str, substr(0,5) ;
3. str, substring(1,5) ;
4. str, substr(1,5) ;
Answer: A,B
Question: 54
Question: 55
Universal Containers (UC) notices that its application that allows users to search for accounts makes a network request each time a key is pressed. This results in too many requests for the server to handle.
Address this problem, UC decides to implement a debounce function on string change handler. What are three key steps to implement this debounce function? Choose 3 answers:
1. If there is an existing setTimeout and the search string change, allow the existing setTimeout to finish, and do not
enqueue a new setTimeout.
2. When the search string changes, enqueue the request within a setTimeout.
3. Ensure that the network request has the property debounce set to true.
4. If there is an existing setTimeout and the search string changes, cancel the existing setTimeout using the persisted timerId and replace it with a new setTimeout.
5. Store the timeId of the setTimeout last enqueued by the search string change handle.
Answer: A,B,C
Question: 56
What are two unique features of functions defined with a fat arrow as compared to normal function definition? Choose 2 answers
1. The function generated its own this making it useful for separating the function�s scope from its enclosing scope.
2. The function receives an argument that is always in scope, called parent This, which is the enclosing lexical scope.
3. If the function has a single expression in the function body, the expression will be evaluated and implicit returned.
4. The function uses the this from the enclosing scope.
Answer: A,C
Question: 57
Refer to the code below:
After running this code, which result is displayed on the console?
1. > true > false
2. > 5 >undefined C. > 5 > -1
D. > 5 > 0
Answer: B
Question: 58
Which three browser specific APIs are available for developers to persist data between page loads? Choose 3 answers
1. IIFEs
2. indexedDB
3. Global variables
4. Cookies
5. localStorage.
Answer: A,B,E
Question: 59
Which statement phrases successfully?
1. JSO
2. parse ( � foo � );
3. JSO
4. parse ( � foo � );
5. JSO
6. parse( � � foo � � );
7. JSO
8. parse(� � foo � �);
Answer: D
Question: 60
Which statement parses successfully?
1. JSO
2. parse (""foo"�);
3. JSO
4. parse (""foo�");
5. JSO
6. parse ("foo");
7. JSO
8. parse ("foo");
Answer: A
Question: 61
Given HTML below:

Universal Container

Applied Shipping

Burlington Textiles

Which statement adds the priority = account CSS class to the universal COntainers row?
1. Document .querySelector(�#row-uc�).classes.push(�priority-account�);
2. Document .queryElementById(�row-uc�).addclass(�priority-account�);
3. Document .querySelector(�#row-uc�).classList.add(�priority-account�);
4. Document .querySelectorALL(�#row-uc�).classList.add(�priority-account�);
Answer: B
Question: 62
Question: 63
Which option is a core Node,js module?
1. Path
2. Ios
3. Memory
4. locate
Answer: A
Question: 64
Which three actions can be using the JavaScript browser console? Choose 3 answers:
1. View and change DOM the page.
2. Display a report showing the performance of a page.
3. Run code that is not related to page.
4. view, change, and debug the JavaScript code of the page.
5. View and change security cookies.
Answer: A,C,D
Question: 65
Question: 66
A Developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of
the first three number in the array, The test passes:
Let res = sum2([1, 2, 3 ]) ; console.assert(res === 6 ); Res = sum3([ 1, 2, 3, 4]);
console.assert(res=== 6);
A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array. The test passes:
Which two results occur when running the test on the updated sum3 function? Choose 2 answers
1. The line 02 assertion passes.
2. The line 02 assertion fails
3. The line 05 assertion passes.
4. The line 05 assertion fails.
Answer: A,D
Question: 67
developer wants to use a module named universalContainersLib and them call functions from it.
How should a developer import every function from the module and then call the fuctions foo and bar?
1. import * ad lib from �/path/universalContainersLib.js�; lib.foo();
lib.bar();
2. import (foo, bar) from �/path/universalContainersLib.js�; foo();
bar();
3. import all from �/path/universalContaineraLib.js�; universalContainersLib.foo(); universalContainersLib.bar();
4. import * from �/path/universalContaineraLib.js�; universalContainersLib.foo(); universalContainersLib.bar();
Answer: A
Question: 68
Question: 69
Question: 70
Question: 71
Which javascript methods can be used to serialize an object into a string and deserialize a JSON string into an object, respectively?
1. JSO
2. stringify and JSO
3. parse
4. JSO
5. serialize and JSO
6. deserialize
7. JSO
8. encode and JSO
. decode
. JSO
. parse and JSO
. deserialize
Answer: A
Question: 72
A developer is wondering whether to use, Promise.then or Promise.catch, especially when a Promise throws an error? Which two promises are rejected?
Which 2 are correct?
1. Promise.reject(�cool error here�).then(error => console.error(error));
2. Promise.reject(�cool error here�).catch(error => console.error(error));
3. New Promise((resolve, reject) => (throw �cool error here�}).catch(error => console.error(error)) ;
4. New Promise(() => (throw �cool error here�}).then(null, error => console.error(error)));
Answer: B,C
Question: 73
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?
1. > true > false
2. > 5 >undefined C. > 5 > -1
D. > 5 > 0
Answer: B
Question: 74
Question: 75
Question: 76
The developer wants to test the array shown: const arr = Array(5).fill(0)
Which two tests are the most accurate for this array? Choose 2 answers:
1. console.assert( arr.length === 5 );
2. arr.forEach(elem => console.assert(elem === 0)) ;
3. console.assert(arr[0] === 0 && arr[ arr.length] === 0);
4. console.assert (arr.length >0);
Answer: A,B
Question: 77
Why would a developer specify a package.jason as a developed forge instead of a dependency?
1. It is required by the application in production.
2. It is only needed for local development and testing.
3. Other required packages depend on it for development.
4. It should be bundled when the package is published.
Answer: B
Question: 78
Question: 79
developer is trying to convince management that their team will benefit from using Node.js for a backend server that they are going to create. The server will be a web server that handles API requests from a website that the team has already built using HTML, CSS, and JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager? Choose 3 answers:
1. I nstalls with its own package manager to install and manage third-party libraries.
2. Ensures stability with one major release every few years.
3. Performs a static analysis on code before execution to look for runtime errors.
4. Executes server-side JavaScript code to avoid learning a new language.
5. User non blocking functionality for performant request handling.
Answer: A,C,E
Question: 80
Question: 81
Question: 82
Refer to the expression below: Let x = (�1� + 2) == (6 * 2);
How should this expression be modified to ensure that evaluates to false? A. Let x = (�1� + � 2�) == ( 6 * 2);
B. Let x = (�1� + 2) == ( 6 * 2);
C. Let x = (1 + 2) == ( �6� / 2);
D. Let x = (1 + 2 ) == ( 6 / 2);
Answer: B
Question: 83
Question: 84
A test has a dependency on database.query. During the test the dependency is replaced with an object called database with the method, query, that returns an array. The developer needs to verify how many times the method was called and the arguments used each time.
Which two test approaches describe the requirement? Choose 2 answers
1. Integration
2. Black box
3. White box
4. Mocking
Answer: C,D
Question: 85
In the browser, the window object is often used to assign variables that require the broadest scope in an application Node.js application does not have access to the window object by default.
Which two methods are used to address this? Choose 2 answers
1. Use the document object instead of the window object.
2. Assign variables to the global object.
3. Create a new window object in the root file.
4. Assign variables to module.exports and require them as needed.
Answer: B
Question: 86
Question: 87
Question: 88
Question: 89
Given the following code:
Let x =(�15� + 10)*2;
What is the value of a? A. 3020
1. 1520
2. 50
3. 35
Answer: A
Question: 90
Which option is a core Node,js module?
1. Path
2. Ios
3. Memory
4. locate
Answer: A
Question: 91
developer removes the HTML class attribute from the checkout button, so now it is simply:
.
There is a test to verify the existence of the checkout button, however it looks for a button with class= �blue�. The test fails because no such button is found.
Which type of test category describes this test?
1. True positive
2. True negative
3. False positive
4. False negative
Answer: D
Question: 92
Which option is a core Node,js module?
1. Path
2. Ios
3. Memory
4. locate
Answer: A
Question: 93
Question: 94
Question: 95
A developer needs to test this function: 01 const sum3 = (arr) => (
1. if (!arr.length) return 0,
2. if (arr.length === 1) return arr[0],
3. if (arr.length === 2) return arr[0] + arr[1], 05 return arr[0] + arr[1] + arr[2],
06 );
Which two assert statements are valid tests for the function? Choose 2 answers
1. console.assert(sum3(1, �2�)) == 12);
2. console.assert(sum3(0)) == 0);
3. console.assert(sum3(-3, 2 )) == -1);
4. console.assert(sum3(�hello�, 2, 3, 4)) === NaN);
Answer: A,C
Question: 96
Question: 97
A developer creates an object where its properties should be immutable and prevent properties from being added or modified.
Which method should be used to execute this business requirement?
1. Object.const()
2. Object.eval()
3. Object.lock()
4. Object.freeze()
Answer: D
Question: 98
Question: 99
Question: 100
Question: 101
Question: 102
Question: 103
Question: 104
Refer to the code:
Given the code above, which three properties are set pet1? Choose 3 answers:
1. Name
2. canTalk
3. Type
4. Owner
5. Size
Answer: B,C,E
Question: 105
Question: 106
Which option is a core Node,js module?
1. Path
2. Ios
3. Memory
4. locate
Answer: A
Question: 107
Question: 108
Which three statements are true about promises? Choose 3 answers
1. The executor of a new Promise runs automatically.
2. A Promise has a .then() method.
3. A fulfilled or rejected promise will not change states .
4. A settled promise can become resolved.
5. A pending promise can become fulfilled, settled, or rejected.
Answer: B,C,E
Question: 109
developer has a web server running with Node.js. The command to start the web server is node server,js. The web server started having latency issues. Instead of a one second turn around 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?
1. DEBUG = http, https node server.js
2. NODE_DEBUG =http, https node server.js
3. DEBUG =true node server.js
4. NODE_DEBUG =true node server.js
Answer: C
Question: 110
In which situation should a developer include a try .. catch block around their function call?
1. The function has an error that should not be silenced.
2. The function results in an out of memory issue.
3. The function might raise a runtime error that needs to be handled.
4. The function contains scheduled code.
Answer: C
Question: 111
A developer has the following array of student test grades: Let arr = [ 7, 8, 5, 8, 9 ];
The Teacher wants to double each score and then see an array of the students who scored more than 15 points.
How should the developer implement the request?
1. Let arr1 = arr.filter(( val) => ( return val > 15 )) .map (( num) => ( return num *2 ))
2. Let arr1 = arr.mapBy (( num) => ( return num *2 )) .filterBy (( val ) => return val > 15 )) ;
3. Let arr1 = arr.map((num) => num*2). Filter (( val) => val > 15);
4. Let arr1 = arr.map((num) => ( num *2)).filterBy((val) => ( val >15 ));
Answer: C
Question: 112
Which statement accurately describes the behaviour of the async/ await keyworks?
1. The associated class contains some asynchronous functions.
2. The associated function will always return a promise
3. The associated function can only be called via asynchronous methods
4. The associated sometimes returns a promise.
Answer: B
Question: 113
Works in both the browser and Node.js Which meet the requirements?
1. assert (number % 2 === 0);
2. console.error(number % 2 === 0);
3. console.debug(number % 2 === 0);
4. console.assert(number % 2 === 0);
Answer: B

Killexams VCE exam Simulator 3.0.9

Download Killexams-Exam-Simulator-3.0.9.rar

Killexams has introduced Online Test Engine (OTE) that supports iPhone, iPad, Android, Windows and Mac. Javascript-Developer-I Online Testing system will helps you to study and practice using any device. Our OTE provide all features to help you memorize and practice exam mock exam while you are travelling or visiting somewhere. It is best to Practice Javascript-Developer-I exam Questions so that you can answer all the questions asked in test center. Our Test Engine uses Questions and Answers from actual Salesforce Certified JavaScript Developer I exam.

Killexams Online Test Engine Test Screen

Killexams Online Test Engine Progress Chart

Killexams Online Test Engine Test History Graph

Killexams Online Test Engine Performance History

Killexams Online Test Engine Result Details

Online Test Engine maintains performance records, performance graphs, explanations and references (if provided). Automated test preparation makes much easy to cover complete pool of questions in fastest way possible. Javascript-Developer-I Test Engine is updated on daily basis.

You will surely pass Javascript-Developer-I exam with these real questions

Mastering the Javascript-Developer-I exam requires more than just course readings. Unlock your potential with killexams.com’s premium Javascript-Developer-I practice test software, designed to enhance your expertise and deepen your understanding of the essential tips and strategies for Javascript-Developer-I exam questions. Hone your skills by practicing proven techniques through our Real exam Questions Practice Tests, ensuring you are fully prepared to excel in the authentic Javascript-Developer-I exam with confidence.

Latest 2025 Updated Javascript-Developer-I Real exam Questions

Boost Your Success with the Most Reliable Javascript-Developer-I exam Preparation! At killexams.com, we provide actual Javascript-Developer-I exam mock exam free online test in two powerful formats: Javascript-Developer-I PDF and Javascript-Developer-I VCE exam Simulator. The Javascript-Developer-I real test is significantly different from the SalesForce exam, meaning simply practicing the Javascript-Developer-I coursebook will not certain success. Why Choose Killexams? ✅ High Pass Rate (98.9%) – Our candidates consistently achieve outstanding results. ✅ 98% Similarity to Real exam – Our questions mirror the actual Javascript-Developer-I test for maximum accuracy. ✅ Flexible Study Options – obtain the Javascript-Developer-I free online test PDF on any device (iPad, iPhone, PC, Smart TV, Android) or even print Javascript-Developer-I Free PDF to create your own personalized study guide. Maximize Your Preparation While practicing helps, practice is key to success! - Use the VCE exam Simulator to test yourself under real exam conditions. - Repeated practice ensures you memorize answers and respond confidently. - Track your progress and Improve your scores before taking the actual Javascript-Developer-I exam. Pass in Just One Attempt! Don’t leave your success to chance—killexams.com gives you the edge to ace the Javascript-Developer-I exam on your first try. - obtain the SalesForce Javascript-Developer-I Real exam Questions Now! - Visit killexams.com and start your journey to certification success today!

Killexams Review | Reputation | Testimonials | Customer Feedback

I am thankful for killexams.com exam questions and Answers, which gave me the confidence to pass the Javascript-Developer-I exam. Their materials are highly recommended for anyone pursuing further certifications, as they ensured my success with clear and reliable resources.
Martha nods [2025-4-23]

I am proud to have passed my SalesForce exams with the help of Killexams.com Javascript-Developer-I practice exam and actual questions and software. Their tools were instrumental in my preparation, enabling me to study effectively and pass with confidence. I highly recommend their resources to anyone pursuing similar certifications.
Martin Hoax [2025-5-23]

I highly recommend this package to anyone planning to take the Javascript-Developer-I exam. The certification exams are difficult, and it requires a lot of work to pass them. Killexams.com does most of the heavy lifting for you. The Javascript-Developer-I exam questions I received from this website were very similar to those on the actual exam. Without these practice tests, I would have failed, and that is why many people do not pass the Javascript-Developer-I exam on their first attempt.
Martin Hoax [2025-6-2]

More Javascript-Developer-I testimonials...

Javascript-Developer-I Exam

Question: Can I expect all the questions in actual test be from killexams Javascript-Developer-I question bank?
Answer: Killexams provide up-to-date actual Javascript-Developer-I test questions that are taken from the Javascript-Developer-I test prep. These questions' answers are Checked by experts before they are included in the Javascript-Developer-I question bank.

Question: Do I need real mock exam for Javascript-Developer-I exam to pass?
Answer: Yes, You need braindump questions to pass the Javascript-Developer-I exam. Killexams take these Javascript-Developer-I exam questions from actual exam sources, that's why these Javascript-Developer-I exam questions are sufficient to read and pass the exam. Although you can use other sources also for improvement of knowledge like textbooks and other aid material these Javascript-Developer-I questions are sufficient to pass the exam.

Question: Will I be able to find Javascript-Developer-I practice test?
Answer: Yes, once registered at killexams.com you will be able to obtain up-to-date Javascript-Developer-I practice exam that will help you pass the exam with good marks. When you obtain and practice the exam questions, you will be confident and feel improvement in your knowledge.

Question: Will I be able to find actual test Questions & Answers of Javascript-Developer-I exam?
Answer: Yes, once registered at killexams.com you will be able to obtain up-to-date Javascript-Developer-I actual test mock exam that will help you pass the exam with good marks. When you obtain and practice the exam questions, you will be confident and feel improvement in your knowledge.

Question: My killexams account was expired 1 month back, can I still extend?
Answer: Generally, you can extend your membership within a couple of days but still, our team will provide you good renewal coupon. You can always extend your exam obtain account within a short period.

References

Frequently Asked Questions about Killexams Practice Tests

I am facing issue in Installing exam Simulator, Can you help?
Exam Simulator is a simple application that can be installed in any version of Windows. It is compatible with Windows 10 down to Windows XP. If you face an issue in installing an exam simulator on your computer, you should go through the step by step guide at https://killexams.com/exam-simulator-installation.html

Does killexams VCE exam simulator works offline?
Yes, Killexams exam Simulator works offline. Killexams exam simulator also works offline. Just obtain and install on your laptop and you can go anywhere to keep your study going and preparing your exam at a tourist or healthier place. Whenever you need to re-download the exam files, you can connect your computer to the internet and obtain and go offline anytime you like. You do not need the internet all the time to study for your exam. Killexams.com provides an offline method by downloading your Javascript-Developer-I exam questions in PDF format on your mobile phone, iPad or laptop and carry them anywhere you like. You do not need to be online all the time to keep your study going.

Does Javascript-Developer-I TestPrep cover complete course?
Yes, killexams.com covers a complete Javascript-Developer-I exam course. Killexams is the best certification brainpractice questions website that provides up-to-date and 100% valid exam questions with practice tests. These VCE practice tests are very good for test practice to pass the exam on the first attempt. Killexams team keeps on updating the exam practice questions continuously. You can see all Javascript-Developer-I course-related information from the Javascript-Developer-I exam page.

Is Killexams.com Legit?

Without a doubt, Killexams is fully legit in addition to fully dependable. There are several benefits that makes killexams.com reliable and authentic. It provides up-to-date and 100 % valid actual questions including real exams questions and answers. Price is nominal as compared to almost all the services on internet. The mock exam are modified on standard basis utilizing most latest brain dumps. Killexams account make and product delivery is quite fast. Data downloading can be unlimited and also fast. Assistance is available via Livechat and E mail. These are the features that makes killexams.com a strong website that supply actual questions with real exams questions.

Other Sources

Which is the best testprep site of 2025?

Discover the ultimate exam preparation solution with Killexams.com, the leading provider of premium practice exam questions designed to help you ace your exam on the first try! Unlike other platforms offering outdated or resold content, Killexams.com delivers reliable, up-to-date, and expertly validated exam mock exam that mirror the real test. Our comprehensive dumps collection is meticulously updated daily to ensure you study the latest course material, boosting both your confidence and knowledge. Get started instantly by downloading PDF exam questions from Killexams.com and prepare efficiently with content trusted by certified professionals. For an enhanced experience, register for our Premium Version and gain instant access to your account with a username and password delivered to your email within 5-10 minutes. Enjoy unlimited access to updated mock exam through your obtain Account. Elevate your prep with our VCE practice exam Software, which simulates real exam conditions, tracks your progress, and helps you achieve 100% readiness. Sign up today at Killexams.com, take unlimited practice tests, and step confidently into your exam success!

100% Money Back Pass Guarantee

Back to List

Social Profiles

Salesforce Certified JavaScript Developer I Practice Test

Javascript-Developer-I exam Format | Course Contents | Course Outline | exam Syllabus | exam Objectives

100% Money Back Pass Guarantee

Javascript-Developer-I PDF demo Questions

Javascript-Developer-I demo Questions

Killexams VCE exam Simulator 3.0.9

You will surely pass Javascript-Developer-I exam with these real questions

Latest 2025 Updated Javascript-Developer-I Real exam Questions

Tags

Killexams Review | Reputation | Testimonials | Customer Feedback

Javascript-Developer-I Exam

References

Frequently Asked Questions about Killexams Practice Tests

Is Killexams.com Legit?

Other Sources

Which is the best testprep site of 2025?

Important Links for best testprep material

100% Money Back Pass Guarantee

Social Profiles