[Feb 22, 2026] Lesson Brilliant PDF for the JavaScript-Developer-I Tests Free Updated Today [Q128-Q146]

Q128. Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as [1, 2]?
Choose 3 answer

Q129. Which three browser specific APIs are available for developers to persist data between page loads ?
Choose 3 answers

Q130. A developer wants to use a try…catch statement to catch any error that countSheep () may throw and pass it to a handleError () function.
What is the correct implementation of the try…catch?
A)

B)

C)

D)

Q131. A developer is trying to handle an error within a function.
Which code segment shows the correct approach to handle an error without propagating it elsewhere?
A)

B)

C)

D)

Q132. Refer to the code below:
Let str = ‘javascript’;
Str[0] = ‘J’;
Str[4] = ‘S’;
After changing the string index values, the value of str is ‘javascript’. What is the reason
for this value:

Q133. Refer to the code below:
01 const server = require(‘server’);
02 /* Insert code here */
A developer imports a library that creates a web server. Theimported library uses events and callbacks to start the servers Whichcode should be inserted at the line 03 to set up an event and start the web server ?

Q134. Refer to the code below.

After changing the string index values, the of atr is Javascript”. What is the reason for this value?

Q135.

Which code change should be done for the console to log the following when ‘Click me!’ is clicked’
> Row log
> Table log

Q136. A developer is trying to handle an error within a function.
Which code segment shows the correct approach to handle an error without propagating it elsewhere?

Q137. Which two console logs output NaN?
Choose 2 answers | |

Q138. 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?

Q139. Refer to the following object:
const cat ={
firstName: ‘Fancy’,
lastName: ‘ Whiskers’,
Get fullName() {
return this.firstName + ‘ ‘ + this.lastName;
}
};
How can a developer access the fullName property for cat?

Q140. 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?

Q141. A team that works on a big project uses npm to deal with the project’s dependencies.
A developer added a dependency to manipulated dates and pushed the updates to the remote repository. The rest of the team complains that the dependency does not get download when they execute npm install.
Which two reason could be possible explanation for this?

Q142. developer wants to use a module named universalContainersLib and them call functions
from it.
How should a developer import every function from the module and then call the fuctions foo
and bar ?

Q143. Given the code below:

What is logged to the console?

Q144. Refer to the following code that performs a basic mathematical operation on a provided
input:
function calculate(num) {
Return (num +10) / 3;
}
How should line 02 be written to ensure that x evaluates to 6 in the line below?
Let x = calculate (8);

Q145. Given the code below:

What is logged to the console’

Q146. 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?