Which of the following is a single global function defined in the jQuery library?
jQuery()$()Queryanalysis()global()
Correct answer(s):
jQuery()
Subject
JavaScript
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Quizzes in JavaScript
Java and JavaScript are same language?
Correct answer(s):
- False
Who is the inventor or JavaScript?
Correct answer(s):
- Brendan Eich
Inside which HTML element do we put the JavaScript?
Correct answer(s):
<script>
What will be output in console:
var animals = ['Tiger', 'Lion', 'Camel', 'Cow', 'Duck']; console.log(animals.slice(2, 4));
Correct answer(s):
Array ["Camel", "Cow"]
What is going to display with this js code:
var myArray = ['a', 'b', 'c']; console.log(myArray[-1]);
Correct answer(s):
- undefined
Which of these lines of code would replace the content of a webpage with “Saaaaaakib”?
Correct answer(s):
document.body.innerHTML = "Saaaaaakib";
What sort of data type does the document variable store?
Correct answer(s):
- object
When you’re writing JS on a webpage, what is the name of the global variable that represents the DOM?
Correct answer(s):
- document
The DOM is the set of functionality that browsers provide to enable developers to access and manipulate webpages. What does DOM stand for?
Correct answer(s):
- Document Object Model
const team = [
'Mashrafi',
'Sakib',
'Mahmudullah',
'Mushfiq',
'Tamim',
'Rubel',
'Aftab',
'Razzaq',
'Rafiq'
];
const [captain, assistant, ...players] = team;
consoloe.log(players);
What is the output of consoloe.log(players); in your console?
Correct answer(s):
Array ["Mahmudullah", "Mushfiq", "Tamim", "Rubel", "Aftab", "Razzaq", "Rafiq"]
const team = [
'Mashrafi',
'Sakib',
'Mahmudullah',
'Mushfiq',
'Tamim',
'Rubel',
'Aftab',
'Razzaq',
'Rafiq'
];
const [captain, assistant, ...players] = team;
consoloe.log(captain);
What is the output of consoloe.log(captain); in your console?
Correct answer(s):
- Mashrafi
Considering the following snap of code, what is the expected result?
const gotNumber = 46;
if (gotNumber>45) {
var division = 'Second Division';
}
console.log(`Division is ${division} by number ${gotNumber}`);
Correct answer(s):
- Division is Second Division by number 46
Considering the following snap of code, what is the expected result?
const gotNumber = 46;
if (gotNumber>45) {
let division = 'Second Division';
}
console.log(`Division is ${division} by number ${gotNumber}`);
Correct answer(s):
- Error: division is not defined
Considering the following snap of code, what is the expected result?
let dogName = 'Tom';
let catName = 'Jerry';
[dogName, catName] = [catName, dogName];
console.log(`Dog name: ${dogName}`);
Correct answer(s):
- String output:
Dog name: Jerry
When used as a constructor, like new MyFunction(), the value of this will be a brand new object provided by the JavaScript runtime. If we don’t explicitly return anything from that function, this will be considered its return value.
Correct answer(s):
- true
Apply or call method can be used to override the value of this?
Correct answer(s):
- true
What does the below line do considering it as the first line in your javascript file:
(function(){
alert(this);
})();
Correct answer(s):
- I will see an alert with not null value