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NEW QUESTION 124
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?
- A. Let arr1 = arr.map((num) => ( num *2)).filterBy((val) => ( val >15 ));
- B. Let arr1 = arr.map((num) => num*2). Filter (( val) => val > 15);
- C. Let arr1 = arr.filter(( val) => ( return val > 15 )) .map (( num) => ( return num *2 ))
- D. Let arr1 = arr.mapBy (( num) => ( return num *2 )) .filterBy (( val ) => return val > 15 )) ;
Answer: B
NEW QUESTION 125
Refer to the code below:
const car = {
price:100,
getPrice:function(){
return this.price;
}
};
const customCar = Object.create(car);
customCar.price = 70;
delete customCar.price;const result = customCar.getPrice();
What is the value of result after the code executes?
- A. undefined
- B. 0
- C. 1
- D. null
Answer: C
NEW QUESTION 126
Refer to the following array:
Let arr1 = [ 1, 2, 3, 4, 5 ];
Which two lines of code result in a second array, arr2 being created such that arr2 is not
a reference to arr1?
- A. Let arr2 = arr1;
- B. Let arr2 = arr1.slice(0, 5);
- C. Let arr2 = arr1.sort();
- D. Let arr2 = Array.from(arr1);
Answer: B,D
NEW QUESTION 127
Which two console logs output NaN?
Choose 2 answers | |
- A. console.loeg(10 / 'five');
- B. console.log(parseInt ' ("two')) ;
- C. console.log(10 / Number('5) ) ;
- D. console.log(10 / 0);
Answer: B,C
NEW QUESTION 128
Refer to the code below?
Let searchString = ' look for this ';
Which two options remove the whitespace from the beginning of searchString?
Choose 2 answers
- A. searchString.trimStart();
- B. searchString.replace(/*\s\s*/, '');
- C. searchString.trimEnd();
- D. trimStart(searchString);
Answer: A,B
NEW QUESTION 129
Cloud Kicks has a class to represent item for sale in an online store, as shown below:
A new business requirement comes in that request a clothingitem class, that should have all of the properties and methods of the item class, but will also have properties that are specific top clothes.
Which line of code properly declares the clothingitem class such that it inherits from item?
- A. Class clothingitem extends item (
- B. Class Clothingitem (
- C. Class clothing item super item (
- D. Class clothingitem implements item (
Answer: A
NEW QUESTION 130
Refer to the code below:
Which statement allows a developer to cancel the scheduled timed function?
- A. removeTimeout (timeFunction) ;
- B. ClearTimeout (timerId) ;
- C. ClearTimeout (timeFunction);
- D. removeTimeout (timerId) ;
Answer: A
NEW QUESTION 131
A developer creates a generic function to log custom messages in the console. To do this,
the function below is implemented.
01 function logStatus(status){
02 console./*Answer goes here*/{'Item status is: %s', status};
03 }
Which three console logging methods allow the use of string substitution in line 02?
- A. Error
- B. Log
- C. Assert
- D. Message
- E. Info
Answer: B,C,E
NEW QUESTION 132
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 A Option B?
- A. 1000 growl method is created for Option A. 1 growl methods are created for Option B.
- B. 1000 growl methods are created regardless of which option is used.
- C. 1 growl method is created for Option A. 1000 growl methods are created for Option B.
- D. 1 growl method is created regardless of which option is used.
Answer: A
NEW QUESTION 133
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
- A. let res = fizzbuzz(15);
console.assert ( res === ' fizzbuzz ' ) - B. let res = fizzbuzz(5);
console.assert ( res === ' ' ); - C. let res = fizzbuzz(Infinity);
console.assert ( res === ' ' ) - D. let res = fizzbuzz(3);
console.assert ( res === ' buzz ' )
Answer: A,C,D
NEW QUESTION 134
Given the expressions var1 and var2, what are two valid ways to return the concatenation of the two expressions and ensure it is string? Choose 2 answers
- A. string.concat (var1 +var2)
- B. var1.toString ( ) var2.toString ( )
- C. var1 + var2
- D. String (var1) .concat (var2)
Answer: A,B
NEW QUESTION 135
Refer to the code below:
Why does the function bar have access to variable =?
- A. Outer function's scope
- B. Inner function's scope
- C. Hoisting
- D. Prototype chain
Answer: B
NEW QUESTION 136
A developer is creating a simple webpage with a button. When a user clicks 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 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 04, use button. removeEventlistener ('click', listen );
- B. On line 02, use event.first to test if it is the first execution.
- C. On line 04, use event .stopPropagetion ( );
- D. On line 06, ad an option called once to button. addEventlistener ( ).
Answer: A,D
NEW QUESTION 137
Refer to the following code that imports a module named Utills,
Which two implementations of Utill, je 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 (foo, bar) - B. Export default class (
Foo ( ) ( return 'foo ,; )
Bar ( ) ( return ;bar ; ) - C. //FooUtill.js and barUtils, js exist
Import (foo) from ,/Path/footUtils.js,:
Export (foo, bar) - D. Const foo = ( ) => ( return 'foo; ; )
Const bar => => { return 'bar ';}
Export default foo, bar;
Answer: B
NEW QUESTION 138
Refer to the code below:
Let foodMenu1 = ['pizza', 'burger', 'French fries'];
Let finalMenu = foodMenu1;
finalMenu.push('Garlic bread');
What is the value of foodMenu1 after the code executes?
- A. [ 'Garlic bread']
- B. [ 'pizza','Burger', 'French fires']
- C. [ 'Garlic bread' , 'pizza','Burger', 'French fires' ]
- D. [ 'pizza','Burger', 'French fires', 'Garlic bread']
Answer: B
NEW QUESTION 139
Universal Containers (UC) just launched a new landing page, but users complain that the website is slow. A developer found some functions any that might cause this problem. To verify this, the developer decides to execute everything and log the time each of these three suspicious functions consumes.
Which function can the developer use to obtain the time spent by every one of the three functions?
- A. console.getTime ()
- B. console. timeLog ()
- C. console.trace()
- D. console.timeStamp ()
Answer: B
NEW QUESTION 140
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?
- A. Object. filebase ( )
- B. Object. real ( )
- C. Object const ( )
- D. Object. Lock ( )
Answer: A
NEW QUESTION 141
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