Best Preparations of JavaScript-Developer-I Exam 2024 Salesforce Developer Unlimited 223 Questions
Focus on JavaScript-Developer-I All-in-One Exam Guide For Quick Preparation.
NEW QUESTION # 48
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(Infinity);
console.assert ( res === ' ' ) - B. let res = fizzbuzz(15);
console.assert ( res === ' fizzbuzz ' ) - C. let res = fizzbuzz(5);
console.assert ( res === ' ' ); - D. let res = fizzbuzz(3);
console.assert ( res === ' buzz ' )
Answer: A,B,D
NEW QUESTION # 49
Refer to the code below:
Which assertion accurately tests the above code?
- A. Console, assert ( await functionalUnderTest (true) , 'not ok' )
- B. Console, assert ( await functionalUnderTest (true) , 'not ok) )
- C. Console, assert (functionalUnderTest (true) , 'ok')
- D. Console, assert ( await functionalUnderTest (true) , 'ok
Answer: C
NEW QUESTION # 50
A developer is leading the creating of a new browser application that will server a single page application. The team wants to use a new web framework Minialist.js. The lead developer wants to advocate for a more seasoned wen framework that already has a community around it.
Which two frameworks should the load developer advocate for?
- A. Express
- B. Angular
- C. Koa
- D. Vue
Answer: A,B
NEW QUESTION # 51
Given two expressions var1 and var2, what are two valid ways to return the logical AND of the two expression and ensure it is data type Boolean? Choose 2 answers
- A. Boolean (var1) && Boolean (var2)
- B. Boolean (var1 && var2)
- C. Var1 && var2
- D. Var1. Toboolean ( ) && var2, to Boolean ( )
Answer: B,D
NEW QUESTION # 52
Refer to the code snippet:
What is the value of array after the code executes?
- A. 1, 2, 3, 4, 5, 4
- B. 1, 2, 3, 4, 5, 4, 4
- C. 1, 2, 3, 4, 4, 5, 4
- D. 1, 2, 3, 5
Answer: D
NEW QUESTION # 53
Refer to the code below:
let car1 = new Promise((_ ,reject)=> setTimeout(reject,2000,"Car1 crashed in")); let car2 = new Promise(resolve => setTimeout(resolve,1500,"Car2 completed")); let car3 = new Promise(resolve => setTimeout(resolve,3000,"Car3 completed")); Promise.race([car1,car2,car3])
.then(value=>{
let result = `${value} the race.`;
}).catch(err=>{
console.log('Race is cancelled.',err);
});
What is the value of result when promise.race execues?
- A. Car2 completed the race.
Answer: A
NEW QUESTION # 54
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. The command fails, because version 130 is not found
- C. 1.3.5
- D. 1.4.0
Answer: C
NEW QUESTION # 55
Refer to the following object.
How can a developer access the fullName property for dog?
- A. Dog.fullName
- B. Dog, function, fullName
- C. Dog, get, fullName
- D. Dog.fullName ( )
Answer: A
NEW QUESTION # 56
Refer to the code below:
When does promise. Finally on line 08 get called?
- A. When resolved or rejected
- B. When resolved
- C. When rejected
- D. When resolved and settled
Answer: A
NEW QUESTION # 57
A developer wants to iterate through an array of objects and count the objects and count the objects whose property value, name, starts with the letter N.
Const arrObj = [{"name" : "Zach"} , {"name" : "Kate"},{"name" : "Alise"},{"name" : "Bob"},{"name" :
"Natham"},{"name" : "nathaniel"}
Refer to the code snippet below:
01 arrObj.reduce(( acc, curr) => {
02 //missing line 02
02 //missing line 03
04 ). 0);
Which missing lines 02 and 03 return the correct count?
- A. Const sum = curr.startsWith('N') ? 1: 0;
Return acc +sum - B. Const sum = curr.name.startsWith('N') ? 1: 0;
Return acc +sum - C. Const sum = curr.startsWIth('N') ? 1: 0;
Return curr+ sum - D. Const sum = curr.name.startsWIth('N') ? 1: 0;
Return curr+ sum
Answer: B
NEW QUESTION # 58
Refer to the code below:
Line 05 causes an error.
What are the values of greeting and salutation once code completes?
- A. Greeting is Hello and salutation is I say hello.
- B. Greeting is Hello and salutation is Hello, Hello.
- C. Greeting is Goodbye and salutation is Hello, Hello.
- D. Greeting is Goodbye and salutation is I say Hello.
Answer: B
NEW QUESTION # 59
Cloud Kicks has a class to represent items for sale in an online store, as shown below:
Class Item{
constructor (name, price){
this.name = name;
this.price = price;
}
formattedPrice(){
return 's' + String(this.price);}}
A new business requirement comes in that requests a ClothingItem class that should have all of
the properties and methods of the Item class but will also have properties that are specific to
clothes.
Which line of code properly declares the clothingItem class such that it inherits from
Item?
- A. Class ClothingItem extends Item {
- B. Class ClothingItem super Item {
- C. Class ClothingItem {
- D. Class ClothingItem implements Item{
Answer: A
NEW QUESTION # 60
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.trace()
- C. console. timeLog ()
- D. console.timeStamp ()
Answer: C
NEW QUESTION # 61
Refer to the code declarations below:
Which three expressions return the string JavaScript?
Choose 3 answers
- A. $(str1) $ (str2} ';
- B. Str1 + str2;
- C. Str1.concat (str2);
- D. Str1.join (str2);
- E. Concat (str1, str2);
Answer: A,B,C
NEW QUESTION # 62
Given the following code:
What is the output of line 02?
- A. "undefined" 0
- B. "x-
- C. "null"
- D. 'object"
Answer: D
NEW QUESTION # 63
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