Salesforce JavaScript-Developer-I Test Engine Practice Test Questions, Exam Dumps
100% Free JavaScript-Developer-I Daily Practice Exam With 224 Questions
NEW QUESTION # 80
Given the following code:
document.body.addEventListener(' click ', (event) => {
if (/* CODE REPLACEMENT HERE */) {
console.log('button clicked!');
)
});
Which replacement for the conditional statement on line 02 allows a developer to correctly determine that a button on page is clicked?
- A. e.nodeTarget ==this
- B. event.target.nodeName == 'BUTTON'
- C. Event.clicked
- D. button.addEventListener('click')
Answer: B
NEW QUESTION # 81
Refer to the code below:
Line 05 causes an error.
What are the values of greeting and salutation once code completes?
- A. Greeting is Goodbye and salutation is Hello, Hello.
- B. Greeting is Hello and salutation is Hello, Hello.
- C. Greeting is Hello and salutation is I say hello.
- D. Greeting is Goodbye and salutation is I say Hello.
Answer: B
NEW QUESTION # 82
Refer to the code below:
let sayHello = () => {
console.log ('Hello, world!');
};
Which code executes sayHello once, two minutes from now?
- A. setInterval(sayHello, 12000);
- B. setTimeout(sayHello(), 12000);
- C. setTimeout(sayHello, 12000);
- D. delay(sayHello, 12000);
Answer: C
NEW QUESTION # 83
Refer to the following code:
What is the output of line 11?
- A. ["foo:1", "bar:2"]
- B. ["bar", "foo"]
- C. [1,2]
- D. ["foo", "bar"]
Answer: D
NEW QUESTION # 84
A developer writes the code below to return a message to a user attempting to register a new username. If the username is available, a variable named nag is declared and assigned a value on line 03.
What is the value of msg when getAvailableabilityMessage ("newUserName") is executed and get Availability ("newUserName") returns true?
- A. undefined
- B. "msg is not defined"
- C. "User-name available"
- D. "newUserName"
Answer: C
NEW QUESTION # 85
Teams at Universal Containers (UC) work on multiple JavaScript projects at the same time.
UC is thinking about reusability and how each team can benefit from the work of others.
Going open-source or public is not an option at this time.
Which option is available to UC with npm?
- A. Private packages can be scored, and scopes can be associated to a private
registries. - B. Private registries are not supported by npm, but packages can be installed via git.
- C. Private registries are not supported by npm, but packages can be installed via URL.
- D. Private packages are not supported, but they can use another package manager like
yarn.
Answer: A
NEW QUESTION # 86
Refer to the code below:
What is result of the code block?
- A. An error is thrown.
- B. The console logs only 'flag',
- C. The console logs flag' and then an error is thrown.
- D. The console logs 'flag' and another flag',
Answer: C
NEW QUESTION # 87
There is a new requirement for a developer to implement a currPrice method that will return the current price of the item or sales..
What is the output when executing the code above
- A. 50
80
50
72 - B. 50
80
72 - C. 50
80
Uncaught Reference Error:this,discount is undefined
72 - D. 50
Uncaught TypeError: saleItem,desrcription is not a function
50
80
Answer: A
NEW QUESTION # 88
Refer to thefollowing code that imports a module named utils:
import (foo, bar) from '/path/Utils.js';
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers
- A. const foo = () => { return 'foo' ; }const bar = () => { return 'bar' ; }export { bar, foo }
- B. const foo = () => { return 'foo';}const bar = () => {return 'bar'; }Export default foo, bar;
- C. // FooUtils.js and BarUtils.js existImport (foo) from '/path/FooUtils.js';Import (boo) from '
/path/NarUtils.js'; - D. Export default class {foo() { return 'foo' ; }bar() { return 'bar' ; }}
Answer: A,D
NEW QUESTION # 89
Referto 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, tony);
- B. leo.roar = () => { console.log('They\'re pretty good!'); );
- C. Object.assign (leo. Tiger);
- D. leo.prototype.roar = ( ) =>( console.log('They\'re pretty good!'); };
Answer: A,B
NEW QUESTION # 90
Refer to the following code that performs a basic mathematical operation on a provided input:
function calculate(num) {
Return (num +10) / 3;
}
How should line 02 be written to ensure that x evaluates to 6 in the line below?
Let x = calculate (8);
- A. Return Integer(num +10) /3;
- B. Return Number((num +10) /3 );
- C. Return Number(num + 10) / 3;
- D. Return (Number (num +10 ) / 3;
Answer: D
NEW QUESTION # 91
Refer to the following array:
Letarr = [ 1,2, 3, 4, 5];
Which three options result in x evaluating as [3, 4, 5] ?
Choose 3 answers.
- A. Let x= arr.slice(2);
- B. Let x= arr.filter (( a) => (a<2));
- C. Letx= arr.filter((a) => ( return a>2 ));
- D. Let x= arr.splice(2,3);
- E. Let x = arr.slice(2,3);
Answer: A,C,D
NEW QUESTION # 92
At Universal Containers, every team has its own way of copyingJavaScript objects. The code snippet shows an Implementation from one team:
What is the output of the code execution?
- A. SyntaxError: Unexpected token in JSON
- B. Hello Dan
- C. Hello Dan Doe
- D. Hello John Doe
Answer: A
NEW QUESTION # 93
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. The test passes:
A different developer made changes to the behavior of sum3 to instead sum all of the number present In the array.
Which two results occur when running the test on the updated sum3 function?
Choose 2 answers
- A. The line 02 assertion passes.
- B. The line 05 assertion passes.
- C. The line 05 assertion fails.
- D. The line 02 assertion fails.
Answer: A,C
NEW QUESTION # 94
Which option is true about the strict mode in imported modules?
- A. Imported modules are in strict model whether you declare them as such or not.
- B. You can only reference notStrict () functions from the imported module.
- C. Add the statement use strict = false, before any other statements In the module to enable not-strict mode.
- D. Add the statement use non-strict; before any other statement in the module to enable not strict mode.
Answer: B
NEW QUESTION # 95
A developer writes the code below to return a message to a user attempting to register a new username. If the username is available, a variable named nag is declared and assigned a value on line 03.
What is the value of msg when getAvailableabilityMessage ("newUserName") is executed and get Availability ("newUserName") returns true?
- A. undefined
- B. "msg is not defined"
- C. "User-name available"
- D. "newUserName"
Answer: C
NEW QUESTION # 96
A developer copied a JavaScript object:
How does the developer access dan's forstName,lastName? Choose 2 answers
- A. dan,name ( )
- B. dan, firstName = dan.lastName
- C. dan,firstname ( ) + dan, lastName ( )
- D. dan,name
Answer: A,B
NEW QUESTION # 97
A developer at Universal Containers is creating their new landing page based on HTML, CSS, and JavaScript. The website includes multiple external resources that are loaded when the page is opened.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage Is loaded and there Is no need to wait for the resources to be available.
Which statement should be used to call personalizeWebsiteContent based on the above business requirement?
- A. windows,addEventListener('onload', personalizeWebsiteContent);
- B. windows,addEventListener('load', personalizeWebsiteContent);
- C. windows,addEventListener('DOMContent Loaded ', personalizeWebsiteContent);
- D. windows,addEventListener('onDOMCContentLoaded', personalizeWebsiteContent);
Answer: B
NEW QUESTION # 98
......
Salesforce JavaScript-Developer-I exam covers a wide range of topics, including data modeling, Apex programming, JavaScript development, Visualforce development, and Lightning Component development. Candidates must demonstrate their proficiency in each of these areas to pass the exam. JavaScript-Developer-I exam also tests the candidate's ability to design and develop custom applications using Salesforce tools and technologies.
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