NEW QUESTION 1
A developer has a formatName function that takes two arguments, firstName and lastName and returns a string. They want to schedule the
function to run once after five seconds.
What is the correct syntax to schedule this function?

• A. setTimeout (formatName(), 5000, "John", "BDoe");
• B. setTimeout (formatName('John', ‘'Doe'), 5000);
• C. setTimout(() => { formatName("John', 'Doe') }, 5000);
• D. setTimeout ('formatName', 5000, 'John", "Doe');

Answer: D

NEW QUESTION 2
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 3
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. Hello Dan Doe
• B. Hello John DOe
• C. TypeError: dan.name is not a function
• D. TypeError: Assignment to constant variable.

Answer: C

NEW QUESTION 4
Refer to the following array: Let arr = [ 1,2, 3, 4, 5];
Which three options result in x evaluating as [3, 4, 5] ? Choose 3 answers.

• A. Let x= arr.filter (( a) => (a<2));
• B. Let x=arr.splice(2,3);
• C. Let x= arr.slice(2);
• D. Let x= arr.filter((a) => ( return a>2 ));
• E. Let x = arr.slice(2,3);

Answer: BCD

NEW QUESTION 5
What is the result of the code block?

• A. The console logs only ‘flag’.
• B. The console logs ‘flag’ and another flag.
• C. An error is thrown.
• D. The console logs ‘flag’ and then an error isthrown.

Answer: D

NEW QUESTION 6
A developer wrote the following codeto 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 thearray.

Which two results occur when running this test on the updated sum3 function? Choose 2 answers

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

Answer: BD

NEW QUESTION 7
Which three actions can be using the JavaScript browser console? Choose 3 answers:

• A. View and change DOM the page.
• B. Display a report showing the performance of a page.
• C. Run code that is not related to page.
• D. view , change, and debug the JavaScript code of the page.
• E. View and change security cookies.

Answer: ACD

NEW QUESTION 8
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 9
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, 4, 4, 5, 4]
• C. [1, 2, 3, 5]
• D. [1, 2, 3, 4, 5, 4]

Answer: B

NEW QUESTION 10
Refer to the code below:

Why does the function bar have access to variable a ?

• A. Inner function’s scope
• B. Hoisting
• C. Outer function’s scope
• D. Prototype chain

Answer: C

NEW QUESTION 11
Refer to the code snippet:

A developer writes this code to return a message to userattempting to register a new username. If the username is available, variable.
What is the return value of msg hen getAvailabilityMessage (“newUserName” ) is executed and getAvailability(“newUserName”) returns false?

• A. “Username available”
• B. “newUserName”
• C. “Msg is not defined”
• D. undefined

Answer: D

NEW QUESTION 12
Refer to the code below:

What is the output of this function when called with an empty array?

• A. Returns 0
• B. Throws an error
• C. Returns 10
• D. Returns NaN

Answer: C

NEW QUESTION 13
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 14
Refer to the code below: FunctionPerson(firstName, lastName, eyecolor) { this.firstName =firstName;
this.lastName = lastName;
this.eyeColor = eyeColor;
}
Person.job = ‘Developer’;
const myFather = new Person(‘John’, ‘Doe’); console.log(myFather.job);
What is the output after the codeexecutes?

• A. ReferenceError: eyeColor is not defined
• B. ReferenceError: assignment to undeclared variable “Person”
• C. Developer
• D. Undefined

Answer: D

NEW QUESTION 15
Refer to the code below: Function changeValue(obj) { Obj.value =obj.value/2;
}
Const objA = (value: 10);
Const objB = objA; changeValue(objB); Const result = objA.value;
What is the value of result after the code executes?

• A. 10
• B. Nan
• C. 5
• D. Undefined

Answer: C

NEW QUESTION 16
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 and settled
• C. WHen resolved
• D. When resolved or rejected

Answer: D

NEW QUESTION 17
A developer is creating a simple webpage with a button. When a userclicks this button for the first time, a message is displayed.
The developer wrote the JavaScript code below, but something is missing. The message gets displayed every time a user clicks the button, instead of just the first time.

Which two code lines make this code work as required? Choose 2 answers

• A. On line 02, use event.first to test if it is the first execution.
• B. On line 04, useevent.stopPropagation ( ),
• C. On line 04, use button.removeEventListener(‘ click” , listen);
• D. On line 06, add an option called once to button.addEventListener().

Answer: CD

NEW QUESTION 18
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