Dependable JavaScript-Developer-I Exam Dumps to Become Salesforce Certified
Get Ready with JavaScript-Developer-I Exam Dumps (2026)
Salesforce JavaScript-Developer-I exam is a multiple-choice exam that consists of 60 questions. The time limit for the exam is 105 minutes, and candidates must score at least 68% to pass. JavaScript-Developer-I exam is available in English, Japanese, and Spanish, and it is proctored online.
NEW QUESTION # 88
Universal Container (UC) notices that its application allows users to search for account makes a network request each time a key is pressed. This results in too many request for the server to handle.
O address this problem, UC decides to implement a deboune function on the search string change handler. Choose 3 answers
- A. When the search string changes, enqueue the request within a setTimeout.
- B. If there is an existing settimeout and the search string changes, allow the existing setTimeout to finish, and do not enqueue a settimeout.
- C. If the there is an existing setTimeout and the search string changes, cancel the existing setTimeout using the persisted timeout replace it with a new setTimeout.
- D. Store the timeId of the setTimeout last enqueued by the search string change handler.
- E. Ensure that the network request has the property debounce set to true,
Answer: A,C,E
NEW QUESTION # 89
A team that works on a big project uses npm to deal with the project's dependencies.
A developer added a dependency to manipulated dates and pushed the updates to the remote repository. The rest of the team complains that the dependency does not get download when they execute npm install.
Which two reason could be possible explanation for this?
- A. The developer added the dependency as a dev dependency, and NOOK_ENV is set to production.
- B. The developer added the dependency as a dev dependency, and NODK_ENV is set to production.
- C. The developer missed the option - add when adding the dependency.
- D. The developer missed the option -ssve when adding the dependency.
Answer: A,B,D
NEW QUESTION # 90
A developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.
Given the code and the information the developer has, which code logs an error at boot time with an event?
A)
B)
C)
D)
- A. Option D
- B. Option B
- C. Option C
- D. Option A
Answer: C
NEW QUESTION # 91
A developer has a server running with Node.js. the command to start the web server is node server.js. the 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?
- A. DEBUO=http, https node server,js
- B. NODE_DEBUO=http, https node server,js
- C. NODE_DEBUO=true node server,js
- D. DEBUO=true node server,js
Answer: A
NEW QUESTION # 92
Given the following code:
What will be the first four numbers logged?
- A. 0012
- B. 0112
- C. 0123
- D. 0122
Answer: B
NEW QUESTION # 93
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
NEW QUESTION # 94
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?
- A. NODE_DEBUG =http, https node server.js
- B. NODE_DEBUG =true node server.js
- C. DEBUG = http, https node server.js
- D. DEBUG =true node server.js
Answer: D
NEW QUESTION # 95
Why would a developer specify a package.jason as a developed forge instead of a dependency ?
- A. Other required packages depend on it for development.
- B. It is only needed for local development and testing.
- C. It should be bundled when the package is published.
- D. It is required by the application in production.
Answer: B
NEW QUESTION # 96
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 or rejected
- C. When resolved and settled
- D. WHen resolved
Answer: B
NEW QUESTION # 97
Which two console logs out NaN?
Choose 2 answers
- A. Console.log (10 / 0);
- B. Console.log(parseint ('two') ) ;
- C. Console.log(10 / 'five' ') ;
- D. Console.log(10 / Number ('5) );
Answer: B,C
NEW QUESTION # 98
Refer to the following array:
Let arr1 = [1, 2, 3, 4, 5];
Which two lines of codes result in a second array, arr2, being created such that arr2 is not a reference to arr1? Choose 2 answers
- A. Let arr2 = arr1 sort ();
- B. Let arr2 = arr1 .slice (0, 5);
- C. Let arr2 = arr1;
- D. Let arr2 = Array. From (arr1) ;
Answer: A,C
NEW QUESTION # 99
Universal containers (UC) just launched a new landing page, but users complain that the website is slow, A developer found some functions that cause this problem, To verify this, the developer decides to execute everything and log the time each of these suspicious function consumes.
Which function can then developer use to obtain the time spent by every one of the three functions?
- A. Console.getTime ( )
- B. Console,trace ( )
- C. Console, timestamp
- D. Console.timeLog ( )
Answer: A
NEW QUESTION # 100
The developer has a function that prints ''Hello'' to an input name. To test this, the developer created a function that returns world''.
What can the developer do to change the code to print ''Hello world''?
- A. Change line 9 to sayhello (world () ;
- B. Change line 5 to function world () (
- C. Change line 7 to ) () ;
- D. Change line 2 to console.log ( 'Hello', name () );
Answer: C
NEW QUESTION # 101
A developer is asked to fix some bugs reported by users. To do that, the developer adds a breakpoint for debugging.
Function Car (maxSpeed, color){
This.maxspeed =masSpeed;
This.color = color;
Let carSpeed = document.getElementById(' CarSpeed');
Debugger;
Let fourWheels =new Car (carSpeed.value, 'red');
When the code execution stops at the breakpoint on line 06, which two types of information are available in the browser console ?
Choose 2 answers:
- A. The information stored in the window.localStorage property
- B. The values of the carSpeed and fourWheels variables
- C. The style, event listeners and other attributes applied to the carSpeed DOM element
- D. A variable displaying the number of instances created for the Car Object.
Answer: A,C
NEW QUESTION # 102
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. leo.roar = () => { console.log('They\'re pretty good!'); );
- C. leo.prototype.roar = ( ) =>( console.log('They\'re pretty good!'); };
- D. Object.assign (leo, tony);
Answer: B,D
NEW QUESTION # 103
Refer to HTML below:
<div id ="main">
<div id = " card-00">This card is smaller.</div>
<div id = "card-01">The width and height of this card is determined by its
contents.</div>
</div>
Which expression outputs the screen width of the element with the ID card-01?
- A. document.getElementById(' card-01 ').innerHTML.lenght*e
- B. document.getElementById(' card-01 ').getBoundingClientRest().width
- C. document.getElementById(' card-01 ').width
- D. document.getElementById(' card-01 ').style.width
Answer: B
NEW QUESTION # 104
A developer writers the code below to calculate the factorial of a given number.
Function factorial(number) {
Return number + factorial(number -1);
}
factorial(3);
What is the result of executing line 04?
- A. -Infinity
- B. RuntimeError
- C. 0
- D. 1
Answer: B
NEW QUESTION # 105
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