BTW, DOWNLOAD part of RealValidExam JS-Dev-101 dumps from Cloud Storage: https://drive.google.com/open?id=1QR4CU3xpVkofKPkG0kn-q6P2cr0RHNH-
Giving its customers real and updated Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101) questions is RealValidExam's major objective. Another great advantage is the money-back promise according to terms and conditions. Download and start using our Salesforce JS-Dev-101 Valid Dumps to pass the JS-Dev-101 certification exam on your first try.
| Topic | Details |
|---|---|
| Topic 1 |
|
| Topic 2 |
|
| Topic 3 |
|
| Topic 4 |
|
| Topic 5 |
|
>> Test JS-Dev-101 Pass4sure <<
Our company has successfully launched the new version of our JS-Dev-101 exam tool. Perhaps you are deeply bothered by preparing the exam, perhaps you have wanted to give it up. Now, you can totally feel relaxed with the assistance of our JS-Dev-101 Study Guide. Our JS-Dev-101 exam dumps are definitely more reliable and excellent than other exam tool. What is more, the passing rate of our JS-Dev-101 study materials is the highest in the market.
NEW QUESTION # 30
Refer to the following code (correcting the missing template literal backticks):
let codeName = 'Bond';
let sampleText = `The name is ${codeName}, Jim ${codeName}`;
A developer is trying to determine if a certain substring is part of a string.
Which three code statements return true?
Answer: B,C,E
Explanation:
First, compute sampleText:
let codeName = 'Bond';
let sampleText = `The name is ${codeName}, Jim ${codeName}`;
The template literal evaluates to:
"The name is Bond, Jim Bond"
Now evaluate each statement:
Option A: sampleText.includes('Jim');
String.prototype.includes(substring) returns true if substring occurs anywhere in the string.
sampleText clearly contains "Jim" ("The name is Bond, Jim Bond").
So this returns true.
Option B: sampleText.includes('The', 1);
includes(searchString, position) starts searching from the given position index.
"The name is Bond, Jim Bond" has "The" starting at index 0.
Starting search at index 1 means "The" at index 0 is not considered, and there is no second "The".
So this returns false.
Option C: sampleText.includes('Jim', 4);
"Jim" appears after "The name is Bond, " which is longer than 4 characters; the index of "Jim" is well past 4.
So when searching from index 4, "Jim" is still found.
This returns true.
Option D: sampleText.indexOf('Bond') !== -1;
String.prototype.indexOf(substring) returns:
-1 if the substring is not found,
Otherwise, the starting index of the first occurrence.
"Bond" appears twice in "The name is Bond, Jim Bond".
So sampleText.indexOf('Bond') is some non-negative index (for the first occurrence).
Therefore indexOf('Bond') !== -1 is true.
Option E: sampleText.substring('Jim');
substring expects numeric indexes: substring(startIndex, endIndex?).
If given a string "Jim" as the argument, JavaScript coerces it to a number:
Number('Jim') → NaN
NaN for startIndex is treated as 0.
So sampleText.substring('Jim') is effectively sampleText.substring(0), which returns the full string "The name is Bond, Jim Bond".
This is a string, not a boolean. The question asks "which code statements return true?" This statement returns a string, not the boolean value true.
Thus, the three statements that actually return true (boolean) are:
Answe r: A, C, D
Study Guide / Concept Reference (no links):
Template literals and ${} interpolation
String.prototype.includes(searchString, position?)
String.prototype.indexOf(substring) and checking for !== -1
String.prototype.substring(start, end?) and argument coercion
Boolean vs non-boolean return types in string methods
NEW QUESTION # 31
Given the code below:
Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?
Answer: D
NEW QUESTION # 32
HTML:
<p> The current status of an Order: <span id="status"> In Progress </span> </p> Which JavaScript statement changes 'In Progress' to 'Completed'?
Answer: A
Explanation:
To select an element by ID, JavaScript uses:
document.getElementById("status")
The ID must be passed without any selector prefixes (no dot, no hash).
Then, to update the text inside:
element.innerHTML = 'Completed';
Why the others are wrong:
A uses ".status" which would match a CSS class, not an ID.
B incorrectly prepends #, which is used in CSS selectors but not in getElementById.
D attempts to use .Value with capital V, which is incorrect for DOM text; .value only applies to form elements.
Thus, option C is correct.
JavaScript Knowledge Reference (text-only)
getElementById takes a raw ID string with no prefixes.
innerHTML updates an element's displayed HTML content.
NEW QUESTION # 33
A class was written to represent items for purchase in an online store, and a second class representing items that are on sale at a discounted price. The constructor sets the name to the first value passed in. There is a new requirement for a developer to implement a description method that will return a brief description for Item and SaleItem.
01 let regItem = new Item('Scarf', 55);
02 let saleItem = new SaleItem('Shirt', 80, .1);
03 Item.prototype.description = function() { return 'This is a ' + this.name; }
04 console.log(regItem.description());
05 console.log(saleItem.description());
06
07 SaleItem.prototype.description = function() { return 'This is a discounted ' + this.name; } What is the output when executing the code above?
Answer: B
Explanation:
Comprehensive and Detailed
Assuming SaleItem inherits from Item via prototype (e.g. SaleItem.prototype = Object.create(Item.prototype)):
Lines 01-02: create regItem and saleItem.
Line 03: define Item.prototype.description.
Now both regItem and saleItem (via inheritance) have a description method from Item.prototype.
Line 04: regItem.description() → 'This is a Scarf'.
Line 05: saleItem.description() → 'This is a Shirt' (same method, but this.name is 'Shirt').
Line 07: SaleItem.prototype.description = ... overrides description only for SaleItem instances going forward.
If we imagine calling regItem.description() and saleItem.description() again after line 07:
regItem.description() still uses Item.prototype.description → 'This is a Scarf'.
saleItem.description() now uses SaleItem.prototype.description → 'This is a discounted Shirt'.
Those four lines correspond to option B.
________________________________________
NEW QUESTION # 34
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
Answer: A
NEW QUESTION # 35
......
In the era of rapid development in the IT industry, we have to look at those IT people with new eyes. They use their high-end technology to create many convenient place for us. And save a lot of manpower and material resources for the state and enterprises. And even reached unimaginable effect. Of course, their income must be very high. Do you want to be the kind of person? Do you envy them? Or you are also IT person, but you do not get this kind of success. Do not worry, RealValidExam's Salesforce JS-Dev-101 Exam Material can help you to get what you want. To select RealValidExam is equivalent to choose a success.
JS-Dev-101 Valid Test Review: https://www.realvalidexam.com/JS-Dev-101-real-exam-dumps.html
What's more, part of that RealValidExam JS-Dev-101 dumps now are free: https://drive.google.com/open?id=1QR4CU3xpVkofKPkG0kn-q6P2cr0RHNH-