Javascript Basics

1/25 Inside which element do you put JavaScript?
- <var>
- <script>
- <section>
- <code>

2/25 What is the result of "w3docs" variable?

var w3docs;

if (10 > 4) {

  w3docs = true;

} else {

  w3docs = 55;

}

true
55
undefined

3/25 How do you open a new window with JavaScript?
- window.open(...);
- window.new(...);
- open(new window());
- window.open_new(...);
4/25 How do you get cookies in JavaScript?
- window.cookies
- location.cookies
- document.cookie
- document.cookies
5/25 How do you get the DOM element with id in JavaScript?
- window.getElementById(...)
- document.getElementById(...)
- page.getElementById(...)
- document.innerHTML.getElementById(...)
6/25 How do you create a new function in JavaScript?
- new.function() {}
- function myFunction() {}
- function:myFunction() {}
- function = myFunction() {}

7/25 Which is undefined variable?

var1 = "12";

if (var2) {

  delete var2;

} else if (var1) {

  delete var1;

}

None
both
only var1
only var2

8/25 Which of the following is the correct way to write an array?
- let fruits = new Array(1:"apple",2:"peach",3:"banana");
- let fruits = new Array:1=(" apple ")2=("peach")3=("banana");
- let fruits = new Array("apple ","peach","banana");
- let fruits = new Array="apple","peach","banana";
9/25 Which of the following is the correct way to write “Welcome to W3docs” on the web page?
- document.write(“Welcome to W3docs”);
- system.out.println(“Welcome to W3docs”);
- print(“Welcome to W3docs”);
- response.write(“Welcome to W3docs”);
10/25 Which of the following is used to identify the array?
- ===
- typeof
- isarrayType()
- ==
11/25 What is called the functions with no return value?
- Static function
- Method
- Procedures
- Dynamic function
12/25 What should be done for lexical scoping implementation?
- Getting the object
- Referencing the current scope chain
- Dereferencing the current scope chain
- None of the above options
13/25 Which of the following options is right for dynamic scoping?
- Variables can be declared outside the scope
- Variables cannot be declared outside the scope
- Variables must be declared outside the scope
- None of the mentioned
14/25 How do you create a Promise in JavaScript?
- new Promise()
- Promise.create()
- createPromise()
- Promise()
15/25 What does 'this' refer to in a JavaScript method?
- The global object
- The function itself
- The object that called the method
- The document object
16/25 What method is used to round a number to the nearest integer in JavaScript?
- Math.round()
- Math.floor()
- Math.ceil()
- Number.round()
17/25 Which operator is used to compare both the value and the type?
- ==
- ===
- !=
- !==
18/25 Which JavaScript method is used to iterate over all properties of an object?
- Object.forEach()
- for...in
- Object.loop()
- forEach()
19/25 What is the purpose of the 'reduce' method in JavaScript?
- To reduce the size of an array
- To execute a reducer function on each element of the array, resulting in a single output value
- To filter out elements from an array
- To count the number of elements in an array
20/25 Which method in an array adds new elements to the end of an array?
- push()
- pop()
- shift()
- unshift()
21/25 How do you define an async function in JavaScript?
- function async() {}
- async function() {}
- function() async {}
- async() function {}
22/25 Which JavaScript method is used to remove the last element from an array and return that element?
- pop()
- push()
- last()
- removeLast()
23/25 Which method is used to add one or more elements to the beginning of an array?
- unshift()
- shift()
- push()
- prepend()
24/25 What method is used to transform a string into an integer in JavaScript?
- int.parse()
- Number.parseInt()
- parseInt()
- Math.parseInt()
25/25 What does the 'map' method do in JavaScript?
- Maps a value to a key in an object
- Creates a new array with the results of calling a function for every array element
- Applies a function against an accumulator and each element in the array (from left to right)
- Searches for elements in an array that match a condition
To get the result of the quiz, please provide your email address (optional)..

It seems you haven't answered any questions yet. Please provide your answers to proceed.

Javascript Basics

1/25 Inside which element do you put JavaScript?

2/25 What is the result of "w3docs" variable?

3/25 How do you open a new window with JavaScript?

4/25 How do you get cookies in JavaScript?

5/25 How do you get the DOM element with id in JavaScript?

6/25 How do you create a new function in JavaScript?

7/25 Which is undefined variable?

8/25 Which of the following is the correct way to write an array?

9/25 Which of the following is the correct way to write “Welcome to W3docs” on the web page?

10/25 Which of the following is used to identify the array?

11/25 What is called the functions with no return value?

12/25 What should be done for lexical scoping implementation?

13/25 Which of the following options is right for dynamic scoping?

14/25 How do you create a Promise in JavaScript?

15/25 What does 'this' refer to in a JavaScript method?

16/25 What method is used to round a number to the nearest integer in JavaScript?

17/25 Which operator is used to compare both the value and the type?

18/25 Which JavaScript method is used to iterate over all properties of an object?

19/25 What is the purpose of the 'reduce' method in JavaScript?

20/25 Which method in an array adds new elements to the end of an array?

21/25 How do you define an async function in JavaScript?

22/25 Which JavaScript method is used to remove the last element from an array and return that element?

23/25 Which method is used to add one or more elements to the beginning of an array?

24/25 What method is used to transform a string into an integer in JavaScript?

25/25 What does the 'map' method do in JavaScript?