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NEW QUESTION # 40
Refer to the code below:
Const pi = 3.1415326,
What is the data type of pi?
Answer: D
NEW QUESTION # 41
A developer is trying to convince management that their team will benefit from using Node.js for a backend server that they are going to create. The server will be a web server that handles API requests from a website that the team has already built using HTML, CSS, and JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager?
Answer: A,B,D
Explanation:
The correct answers are A, C, and E .
Node.js allows JavaScript to run outside the browser. That makes it useful for backend development, command-line tools, APIs, real-time applications, and server-side services.
A is correct because Node.js executes JavaScript on the server side.
A team that already knows:
HTML
CSS
JavaScript
can use JavaScript for backend development as well. This reduces the need to switch to a completely different backend language.
Example:
const http = require( ' http ' );
const server = http.createServer((req, res) = > {
res.end( ' Hello from Node.js ' );
});
server.listen(3000);
This is server-side JavaScript.
C is correct because Node.js uses a non-blocking, event-driven model.
For API servers, this is valuable because Node.js can handle many I/O operations without blocking the entire process while waiting for tasks like:
database queries
file reads
network requests
API responses
Instead of waiting synchronously, Node.js can register callbacks, promises, or async functions and continue handling other work.
E is correct because Node.js commonly installs with npm, the Node Package Manager.
npm is used to install and manage third-party libraries, such as:
Express
Socket.IO
dotenv
Jest
Axios
This makes it easier to build backend applications using reusable packages.
Now review the incorrect answers:
B is incorrect because JavaScript is not primarily a static-analysis language by default. Node.js executes JavaScript at runtime. Static checking can be added with tools such as TypeScript, ESLint, or other analyzers, but that is not an inherent Node.js benefit.
D is incorrect because Node.js does not release one major version only every few years. Its release cycle is more frequent than that, so this is not an accurate benefit statement.
Therefore, the verified answers are A, C, and E .
NEW QUESTION # 42
Refer to the code snippet:
01 let array = [1, 2, 3, 4, 4, 5, 4, 4];
02 for (let i = 0; i < array.length; i++) {
03 if (array[i] === 4) {
04 array.splice(i, 1);
05 i--;
06 }
07 }
What is the value of array after the code executes?
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
The loop removes every 4:
* Start: [1, 2, 3, 4, 4, 5, 4, 4]
* i=0 # 1 (no change)
* i=1 # 2 (no change)
* i=2 # 3 (no change)
* i=3 # 4 # splice removes index 3 # [1,2,3,4,5,4,4], then i-- # 2
* Next loop, i=3 # 4 again # splice # [1,2,3,5,4,4], i-- # 2
* i=3 # 5 (no change)
* i=4 # 4 # splice # [1,2,3,5,4] , i-- # 3
* i=4 # 4 # splice # [1,2,3,5], i-- # 3
* Next i=4, array.length is 4 # loop ends.
All 4s removed, final array: [1, 2, 3, 5].
NEW QUESTION # 43
Refer to the code below:
What is the value of result after the code executes?
Answer: A
NEW QUESTION # 44
Universal Containers recently its new landing page to host crowd-function campaign. The page uses an external library to display some third-party ads. Once the page is fully loaded, It creates more than 50 new HTML items placed randomly inside the DOM, like the one in the code below.
All the elements included the same ad-library-item class. They are hidden by default, and they are randomly displayed while the user navigation through the page.
Tired of all the ads, what can the developer do to temporarily and quickly remove them?
Answer: C
NEW QUESTION # 45
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