The Secret Of Salesforce JavaScript-Developer-I Free Samples

NEW QUESTION 1
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:

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

• A. The line 02 assertion passes.
• B. The line 02 assertion fails
• C. The line 05 assertion passes.
• D. The line 05 assertion fails.

Answer: AD

NEW QUESTION 2
The developer has a function that prints “Hello” to an input name. To test this, thedeveloper created a function that returns “World”. However the following snippet does not print “ Hello World”.

What can the developer do to change the code to print “Hello World” ?

• A. Changeline 7 to ) () ;
• B. Change line 2 to console.log(‘Hello’ , name() );
• C. Change line 9 to sayHello(world) ();
• D. Change line 5 to function world ( ) {

Answer: B

NEW QUESTION 3
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

NEW QUESTION 4
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 typeBoolean ?
Choose 2 answers:

• A. Boolean(var1 && var2)
• B. var1 && var2
• C. var1.toBoolean() && var2toBoolean()
• D. Boolean(var1) && Boolean(var2)

Answer: AD

NEW QUESTION 5
A developer wants to create an object from a function in the browser using the code below:
Function Monster() { this.name =‘hello’ }; Const z = Monster();
What happens due to lack of the new keyword on line 02?

• A. The z variable is assigned the correct object.
• B. The z variable is assigned the correct object but this.name remains undefined.
• C. Window.name is assigned to ‘hello’ and the variable z remains undefined.
• D. Window.m is assigned the correct object.

Answer: C

NEW QUESTION 6
Given the code below:

What should a developer insert at line 15 to output the following message using the method ?
> SNEGeneziz is loading a cartridgegame: Super Monic 3x Force . . .

• A. Console16bit.prototype.load(gamename) = function() {
• B. Console16bit.prototype.load = function(gamename) {
• C. Console16bit = Object.create(GameConsole.prototype).load = function (gamename) {
• D. Console16bit.prototype.load(gamename) {

Answer: B

NEW QUESTION 7
Refer to HTML below:
<p> The current status of an Order: <span id =”status”> In Progress </span> </p>.
Which JavaScript statement changes the text ‘In Progress’ to ‘Completed’ ?

• A. document.getElementById(“status”).Value = ’Completed’ ;
• B. document.getElementById(“#status”).innerHTML = ’Completed’ ;
• C. document.getElementById(“status”).innerHTML = ’Completed’ ;
• D. document.getElementById(“.status”).innerHTML = ’Completed’ ;

Answer: C

NEW QUESTION 8
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(‘Thetruck ${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 =plate;
• B. super(plate);
• C. This.plate =plate;
• D. Vehicle.plate = plate;

Answer: B

NEW QUESTION 9
A developer implements and calls the following code when an application state change occurs: Const onStateChange =innerPageState) => {
window.history.pushState(newPageState, ‘ ’, null);
}
If the back button is clicked after this method is executed, what can a developer expect?

• A. A navigate event is fired with a state property that details the previous application state.
• B. The page is navigated away from and the previous page in the browser’s history is loaded.
• C. The page reloads and all Javascript is reinitialized.
• D. A popstate event is fired with a state property that details the application’s last state.

Answer: B

NEW QUESTION 10
Refer to code below:
Function muFunction(reassign){
Let x = 1;
var y = 1;
if( reassign ) {
Let x= 2;
Var y = 2;
console.log(x);
console.log(y);}
console.log(x);
console.log(y);}
What isdisplayed when myFunction(true) is called?

• A. 2 2 1 1
• B. 2 2 undefined undefined
• C. 2 2 1 2
• D. 2 2 2 2

Answer: C

NEW QUESTION 11
Which statement accurately describes an aspect of promises?

• A. Arguments for the callback function passed to .then() are optional.
• B. In a.then() function, returning results is not necessary since callbacks will catch the result of a previous promise.
• C. .then() cannot be added after a catch.
• D. .then() manipulates and returns the original promise.

Answer: A

NEW QUESTION 12
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 thatx evaluates to 6 in the line below? Let x = calculate (8);

• A. Return Number((num +10) /3 );
• B. Return (Number (num +10 ) / 3;
• C. Return Integer(num +10) /3;
• D. Return Number(num + 10) / 3;

Answer: B

NEW QUESTION 13
Refer to the following code:

What is returned by the function call on line 13?

• A. Undefined
• B. Line 13 throws an error.
• C. ‘Undefined values!’
• D. ‘Null value!’

Answer: A

NEW QUESTION 14
A developer has two ways to write a function: Option A:
function Monster() { This.growl = () => { Console.log (“Grr!”);
}
}
Option B:
function Monster() {}; Monster.prototype.growl =() => { console.log(“Grr!”);
}
After deciding on an option, the developer creates 1000 monster objects. How many growl methods are created with Option AOption B?

• A. 1 growl method is created for Option
• B. 1000 growl methods are created for Option B.
• C. 1000 growl method is created for Option
• D. 1 growl methods are created for Option B.
• E. 1000 growl methods are created regardless of which option is used.
• F. 1 growl method is created regardless of which option is used.

Answer: B

NEW QUESTION 15
Giventhe code below:
const copy = JSON.stringify([ new String(‘ false ’), new Bollean( false ), undefined ]); What is the value of copy?

• A. -- [ \”false\” , { } ]-
• B. -- [ false, { } ]-
• C. -- [ \”false\” , false, undefined ]-
• D. -- [ \”false\” ,false, null ]-

Answer: D

NEW QUESTION 16
Refer to code below:
Const objBook = { Title: ‘Javascript’,
};
Object.preventExtensions(objBook); ConstnewObjBook = objBook; newObjectBook.author = ‘Robert’;
What are the values of objBook and newObjBook respectively ?

• A. [title: “javaScript”] [title: “javaScript”]
• B. {author: “Robert”, title: “javaScript} Undefined
• C. {author: “Robert”, title: “javaScript}{author: “Robert”, title: “javaScript}
• D. {author: “Robert”}{author: “Robert”, title: “javaScript}

Answer: A

NEW QUESTION 17
Universal Containers recently launched its new landing page to host a crowd-funding
campaign. The page uses an external library to display some third-party ads. Once the page is fully loaded, it creates more than 50 new HTML items placed randomly inside the DOM, like the one in the code below:

All the elements includes the same ad-library-item class, They are hidden by default, and they are randomly displayed while the user navigates through the page.

• A. Use the DOM inspector to prevent the load event to be fired.
• B. Use the browser to execute a script that removes all the element containing the class ad-library-item.
• C. Use the DOM inspector to remove all the elements containing the class ad-library-item.
• D. Use the browser console to execute a script that prevents the load event to be fired.

Answer: B

NEW QUESTION 18
......