What is the value of clothes[0]:
JavaScript Fundamentals Quiz
Test your knowledge of JavaScript concepts with this engaging quiz! Whether you're a beginner or trying to brush up on your skills, this quiz covers a variety of topics including arrays, fun
Prepare yourself with:
- 6 challenging questions
- Multiple choice format
- Instant feedback on your answers
const clothes = ['jacket', 't-shirt'];
clothes.length = 0;
clothes[0]; // => ???
'jacket'
' '
Undefined
[]
1. What is the value of numbers?
const length = 4;
const numbers = [];
for (var I = 0; I < length; i++);{
numbers.push(i + 1);
}
numbers; // => ???
5
10
[]
Which code will display the value 5?
Console.log(sum(2,3));
Console.log(sum(2)(3));
Both
What will the following code output?
const arr = [10, 12, 15, 21];
for (var I = 0; I < arr.length; i++) {
setTimeout(function() {
console.log('Index: ' + I + ', element: ' + arr[i]); },
3000);
}
Index: 3, element: 15
Index: 4, element: 21
Index: 4, element: undefined(printed 4 times)
What should be the set value of background-size property such that image will stretch to cover entire content area?
100% 100%
Cover
Contain
100%
What will be the output of variable x,y,z ?
var x=10;
var y=x++;
var z=++x;
console.log(x,y,z)
var y=x++;
var z=++x;
console.log(x,y,z)
10,12,10
10,10,12
12,10,12
10,12,12
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