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NEW QUESTION # 104
A developer wants to use a module called DataPrettyPrint. This module exports one default functioncalled printDate ().
How can a developer import and use the printDate() function?
Answer: C
NEW QUESTION # 105
Refer to the HTML below:
Which JavaScript statement results in changing " The Lion."?
Answer: C
NEW QUESTION # 106
A developer is setting up a Node.js server and is creating a script at the root of the source code, index.js, that will start the server when executed. The developer declares a variable that needs the folder location that the code executes from.
Which global variable can be used in the script?
Answer: C
Explanation:
In Node.js:
* __filename is the absolute path to the current file (including file name).
* __dirname is the absolute path to the directory that contains the current file.
* window.location is a browser-only global, not available in Node.js.
* this.path is not a standard Node.js global for path information.
The requirement is:
"the folder location that the code executes from."
That is exactly what __dirname provides.
So the correct choice is __dirname.
Concepts: Node.js globals, __filename, __dirname, Node vs browser environment.
NEW QUESTION # 107
Refer to the code below:
01 function myFunction(reassign) {
02 let x = 1;
03 var y = 1;
04
05 if (reassign) {
06 let x = 2;
07 var y = 2;
08 console.log(x);
09 console.log(y);
10 }
11
12 console.log(x);
13 console.log(y);
14 }
What is displayed when myFunction(true) is called?
Answer: D
Explanation:
This question tests understanding of let (block scope) and var (function scope) in JavaScript.
* Initial declarations in the function:
let x = 1; // line 2
var y = 1; // line 3
Here:
* x is declared with let, so it is block-scoped to the function body.
* y is declared with var, so it is function-scoped to the entire function.
* Inside the if (reassign) block (and since reassign is true, we enter it):
if (reassign) {
let x = 2; // line 6
var y = 2; // line 7
console.log(x); // line 8
console.log(y); // line 9
}
Detailed behavior:
* let x = 2; on line 6 creates a new block-scoped variable x that exists only inside the if block. It does not change the outer x declared on line 2.
* var y = 2; on line 7 declares y with var again, but var is function-scoped. This effectively reassigns the same y defined on line 3 for the entire function. After this line, y is 2 everywhere in the function.
Now, inside the if block:
* console.log(x); (line 8) logs the inner block-scoped x, which is 2.
* console.log(y); (line 9) logs y, which is the function-scoped y that was set to 2.
So the first two outputs are:
* 2
* 2
* After the if block, execution continues:
console.log(x); // line 12
console.log(y); // line 13
Outside the if block:
* The block-scoped let x = 2; no longer exists; it was only visible inside the if block.
* The outer let x = 1; (line 2) is still in scope and has not been changed.
Thus:
* console.log(x); (line 12) logs the outer x, which is still 1.
* console.log(y); (line 13) logs y which, due to var y = 2; inside the if, is now 2 for the whole function.
Therefore, when myFunction(true) is called, the output in order is:
* 2 (inner x in if)
* 2 (function-scoped y after reassignment)
* 1 (outer x after if)
* 2 (function-scoped y remains 2)
This corresponds to:
The answer: B (2 2 1 2)
JavaScript knowledge / study guide reference concepts:
* let declarations and block scope
* var declarations and function scope
* Shadowing of variables with let inside a block
* Re-declaration and reassignment of var within a function
* Execution order of statements and console output
NEW QUESTION # 108
A developer creates a simple webpage with an input field. When a user enters text in the input field and clicks the button, the actual value of the field must be displayed in the console.
Here is the HTML file content:
<input type =" text" value="Hello" name ="input">
<button type ="button" >Display </button>
The developer wrote the javascript code below:
Const button = document.querySelector('button');
button.addEvenListener('click', () => (
Const input = document.querySelector('input');
console.log(input.getAttribute('value'));
When the user clicks the button, the output is always "Hello".
What needs to be done make this code work as expected?
Answer: D
NEW QUESTION # 109
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