Javascript Basics

1/25 What is the result of "w3docs" variable?

var w3docs;

if (10 > 4) {

  w3docs = true;

} else {

  w3docs = 55;

}

true
55
undefined

2/25 Which of the following is the correct syntax to redirect a URL using JavaScript?
- document.location='http://www.w3docs.com';
- navigator.location='http://www.w3docs.com';
- window.location='http://www.w3docs.com';
- browser.location='http://www.w3docs.com';
3/25 How do you declare a new date in JavaScript?
- var date = Date();
- var date = date('now');
- var date = new Date();
- var date = date().current();
4/25 Which array method sorts the elements of an array?
- sort()
- changeOrder(order)
- order()
- None of the above metjods
5/25 Which of the following events occurs when the user clicks on an HTML element?
- onchange
- onmouseover
- onmouseclick
- onclick
- onmouseup
6/25 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";
7/25 Which of the following is used to identify the array?
- ===
- typeof
- isarrayType()
- ==
8/25 Which are closures?
- Variables
- Objects
- Functions
- All of the above options
9/25 What will be the output of the following statement?
```
let total = eval("10*10+8");
```
- 10*10+8
- 108 as an integer value
- 108 as a string
- Exception is thrown
10/25 JavaScript is not a case-sensitive language.
- True
- False
11/25 Which of the following is used for assigning a value to a variable?
- *
- =
- -
- x
12/25 What is the purpose of the 'const' keyword in JavaScript?
- To declare a variable that might change later
- To declare a constant variable whose value cannot be changed
- To create a new function
- To define a conditional statement
- To import a module
13/25 Which method converts a JSON string into a JavaScript object?
- JSON.parse()
- JSON.stringify()
- Object.parse()
- String.parseJSON()
- JSON.toObject()
14/25 What does 'this' refer to in a JavaScript method?
- The global object
- The function itself
- The object that called the method
- The document object
15/25 What method is used to round a number to the nearest integer in JavaScript?
- Math.round()
- Math.floor()
- Math.ceil()
- Number.round()
16/25 Which method is used to serialize an object into a JSON string in JavaScript?
- JSON.stringify()
- JSON.parse()
- Object.toString()
- Stringify.object()
17/25 How do you declare a class named 'Car' in JavaScript?
- class Car {}
- function Car() {}
- new Class(Car)
- createClass('Car')
18/25 What is the default scope of a variable declared with 'var' in JavaScript?
- Local scope
- Block scope
- Global scope
- Function scope
19/25 How do you define an async function in JavaScript?
- function async() {}
- async function() {}
- function() async {}
- async() function {}
20/25 Which JavaScript method is used to remove the last element from an array and return that element?
- pop()
- push()
- last()
- removeLast()
21/25 What is the use of 'break' in JavaScript?
- To stop the execution of a loop
- To break the code into multiple lines
- To exit a function
- To pause the debugger
22/25 What will 'console.log(1 + '2' + '3')' output in JavaScript?
- '6'
- '123'
- '15'
- An error
23/25 What is the output of 'console.log(0.1 + 0.2 === 0.3)' in JavaScript?
- true
- false
- undefined
- error
24/25 How can you convert the string '3.14' to a number in JavaScript?
- Number('3.14')
- parseNum('3.14')
- int('3.14')
- parseFloat('3.14')
25/25 Which JavaScript property is used to write a message to the console?
- document.write()
- console.log()
- window.print()
- alert()
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Javascript Basics

1/25 What is the result of "w3docs" variable?

2/25 Which of the following is the correct syntax to redirect a URL using JavaScript?

3/25 How do you declare a new date in JavaScript?

4/25 Which array method sorts the elements of an array?

5/25 Which of the following events occurs when the user clicks on an HTML element?

6/25 Which of the following is the correct way to write an array?

7/25 Which of the following is used to identify the array?

8/25 Which are closures?

9/25 What will be the output of the following statement?

10/25 JavaScript is not a case-sensitive language.

11/25 Which of the following is used for assigning a value to a variable?

12/25 What is the purpose of the 'const' keyword in JavaScript?

13/25 Which method converts a JSON string into a JavaScript object?

14/25 What does 'this' refer to in a JavaScript method?

15/25 What method is used to round a number to the nearest integer in JavaScript?

16/25 Which method is used to serialize an object into a JSON string in JavaScript?

17/25 How do you declare a class named 'Car' in JavaScript?

18/25 What is the default scope of a variable declared with 'var' in JavaScript?

19/25 How do you define an async function in JavaScript?

20/25 Which JavaScript method is used to remove the last element from an array and return that element?

21/25 What is the use of 'break' in JavaScript?

22/25 What will 'console.log(1 + '2' + '3')' output in JavaScript?

23/25 What is the output of 'console.log(0.1 + 0.2 === 0.3)' in JavaScript?

24/25 How can you convert the string '3.14' to a number in JavaScript?

25/25 Which JavaScript property is used to write a message to the console?