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NEW QUESTION # 20
Refer to the following code:
Which statement should be added to line 09 for the code to display 'The boat has a capacity of 10 people?
Answer: D
NEW QUESTION # 21
Refer to the code below:
01 let o = {
02 get js() {
03 let city1 = String( ' St. Louis ' );
04 let city2 = String( ' New York ' );
05
06 return {
07 firstCity: city1.toLowerCase(),
08 secondCity: city2.toLowerCase(),
09 }
10 }
11 }
What value can a developer expect when referencing o.js.secondCity?
Answer: C
Explanation:
1. Getter Functions in JavaScript
In JavaScript, when an object uses the get keyword, it defines a getter method . Accessing a getter property executes the function and returns its value. Thus:
o.js
does not return the getter function; instead, it executes the function located at:
get js() { ... }
and returns the object inside the return block.
2. Behavior of String() and toLowerCase()
Inside the getter:
let city1 = String( ' St. Louis ' );
let city2 = String( ' New York ' );
String() creates a string value.
Then, the returned object is constructed as:
{
firstCity: city1.toLowerCase(),
secondCity: city2.toLowerCase(),
}
The method toLowerCase() is a standard JavaScript string method that returns a new string with all alphabetic characters converted to lowercase .
Therefore:
city2.toLowerCase()
returns:
' new york '
3. Referencing the Property
When the developer writes:
o.js.secondCity
the following happens:
* The getter js runs and returns an object.
* The returned object includes the property:
secondCity: ' new york '
* Accessing .secondCity retrieves the lowercase string ' new york ' .
Therefore, the correct value is ' new york ' .
Why the Other Options Are Incorrect
A). undefined - incorrect because the property secondCity clearly exists in the returned object.
B). An error - incorrect because no invalid operations occur; all methods and properties are valid.
C). ' New York ' - incorrect because toLowerCase() transforms the string to lowercase.
JavaScript Knowledge References (Text-Based)
* Getter methods using the get keyword return computed values when accessed.
* JavaScript String values support the toLowerCase() method, which returns a lowercase version of the original string.
* Accessing nested properties like o.js.secondCity triggers the getter, returning the constructed object.
NEW QUESTION # 22
A developer wrote the following code:
01 let X = object.value;
02
03 try {
04handleObjectValue(X);
05 } catch (error) {
06 handleError(error);
07 }
Thedeveloper has a getNextValue function to execute after handleObjectValue(), but does not want to execute getNextValue() if an error occurs.
How can the developer change the code to ensure this behavior?
Answer: C
NEW QUESTION # 23
Refer to the code below:
What is the value of result after the code executes?
Answer: C
NEW QUESTION # 24
Refer to the following array:
Let arr1 = [1, 2, 3, 4, 5];
Which two lines of codes result in a second array, arr2, being created such that arr2 is not a reference to arr1? Choose 2 answers
Answer: A,B
NEW QUESTION # 25
......
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