How can you access an element with a specific id in HTML using JavaScript?
Anonymous Quiz
16%
document.querySelector(".example")
6%
document.getElementsByClassName("example")
3%
document.getElementsByTagName("example")
75%
document.getElementById("example")
Find errors in the code.
Given an array of numbers. Remove numbers from it that have two or more zeros.
Difficulty: Hard๐ค
Given an array of numbers. Remove numbers from it that have two or more zeros.
Difficulty: Hard๐ค
let numbers = [102, 304, 500, 1002, 20, 404, 80, 7];
function hasTwoOrMoreZeros(num) {
return (num.toString().match(/0/g) && []).length > 2;
}
let filteredNumbers = numbers.filter(num => !hasTwoOrMoreZeros(num));
console.log(filteredNumbers);
Which statement is used to execute a function in JavaScript?
Anonymous Quiz
13%
call
22%
run
59%
function
6%
execute
Find error in the code.
Difficulty: Easy๐
Difficulty: Easy๐
function addNumbers(a, b) {
return a + b;
}
let result = addNumbers(5, '10');
console.log('ะ ะตะทัะปััะฐั: ' + result);What is the correct HTML for referring to an external style sheet?
Anonymous Quiz
15%
<style src="styles.css"></style>
66%
<link rel="stylesheet" href="styles.css">
7%
<stylesheet href="styles.css"></stylesheet>
12%
<link href="styles.css" type="text/css">
JavaScript Task
Given an array of numbers. Increase each number in the array by 10 percent.
Difficulty: Easy๐
Given an array of numbers. Increase each number in the array by 10 percent.
Difficulty: Easy๐
let numbers = [100, 200, 300, 400, 500];
What does the "DOM" stand for in JavaScript?
Anonymous Quiz
74%
Document Object Model
8%
Data Object Model
15%
Dynamic Object Model
3%
Document Order Model
โค1
Which of the following is the correct way to center a block element horizontally using margins?
Anonymous Quiz
11%
margin: 0;
51%
margin: 0 auto;
23%
margin: 0 50%;
14%
margin: auto 0;
Which HTML5 element represents a self-contained piece of content that could be distributed independently?
Anonymous Quiz
26%
<div>
20%
<section>
17%
<container>
37%
<article>
What will this code output? Spot the bug.
Difficulty: Hard๐ค
Difficulty: Hard๐ค
for (var i = 0; i < 5; i++) {
setTimeout(function() {
console.log(i);
}, 1000);
}Which HTML tag is used to define an unordered list?
Anonymous Quiz
73%
<ul>
9%
<li>
5%
<ol>
14%
<dl>
What does the flex-shrink property do in CSS Flexbox?
Anonymous Quiz
22%
It controls the growth of a flex item when there's extra space.
52%
It controls the shrinkage of a flex item when there's not enough space.
9%
It sets the width of a flex item.
17%
It aligns items in a flex container.
What is true about a variable declared with "const" in JavaScript?
Anonymous Quiz
41%
The variable must be initialized at the time of declaration.
41%
The value of the variable can never change.
14%
The reference of an object or array declared with const can change.
5%
const variables are function-scoped.
How can you select the element with the id 'example' in CSS?
Anonymous Quiz
26%
.example
8%
example
62%
5%
*example
What will this code output to the console?
Difficulty: Easy ๐
Difficulty: Easy ๐
function add(a, b) {
return a * b;
}
const result = add(5,'2');
console.log(result);What is the purpose of the data-* attribute in HTML?
Anonymous Quiz
20%
To specify CSS styles
23%
To define default values for form fields
20%
To link to external resources
37%
To store custom data private to the page or application