Javascript Basics

1/25 How can you detect the application name of the client’s browser?
- navigator.appName
- navigator.browserName
- browser.name
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 Which array method sorts the elements of an array?
- sort()
- changeOrder(order)
- order()
- None of the above metjods
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 Which of the following is used to identify the array?
- ===
- typeof
- isarrayType()
- ==
7/25 What will be the result of the following code snippet?
```
let stringToNum = parseInt("123ab");
```
- 123
- Exception
- 123ab
- NaN
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 Which of the following is used for assigning a value to a variable?
- *
- =
- -
- x
11/25 What will happen if the return statement doesn’t have the associated expression?
- It will throw an exception
- It will return 0
- It will return undefined
- None of the above options
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 How do you create a Promise in JavaScript?
- new Promise()
- Promise.create()
- createPromise()
- Promise()
15/25 Which of these is a correct way to declare an arrow function in JavaScript?
- function() => {}
- () => {}
- => function() {}
- () -> {}
16/25 Which event occurs when a user clicks on an HTML element in JavaScript?
- onmouseover
- onclick
- onchange
- onhover
17/25 Which operator is used to compare both the value and the type?
- ==
- ===
- !=
- !==
18/25 What is the result of 'typeof NaN' in JavaScript?
- 'number'
- 'NaN'
- 'undefined'
- 'null'
19/25 What is the event loop in JavaScript?
- A loop that handles event listeners
- The mechanism that allows JavaScript to perform non-blocking operations
- A type of for loop
- A method to loop through event properties
20/25 What is the default scope of a variable declared with 'var' in JavaScript?
- Local scope
- Block scope
- Global scope
- Function scope
21/25 What will 'console.log(1 + '2' + '3')' output in JavaScript?
- '6'
- '123'
- '15'
- An error
22/25 What is the correct syntax for creating a new Date object in JavaScript?
- var myDate = new Date();
- var myDate = Date.now();
- var myDate = createNewDate();
- var myDate = new DateObject();
23/25 What is the output of 'console.log(0.1 + 0.2 === 0.3)' in JavaScript?
- true
- false
- undefined
- error
24/25 Which of the following is a correct method to create a new array?
- var myArray = new Array();
- var myArray = [];
- var myArray = newArray();
- var myArray = Array[];
25/25 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')
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Javascript Basics

1/25 How can you detect the application name of the client’s browser?

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

3/25 Which array method sorts the elements of an array?

4/25 How do you get cookies in JavaScript?

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

6/25 Which of the following is used to identify the array?

7/25 What will be the result of the following code snippet?

8/25 Which are closures?

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

10/25 Which of the following is used for assigning a value to a variable?

11/25 What will happen if the return statement doesn’t have the associated expression?

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 How do you create a Promise in JavaScript?

15/25 Which of these is a correct way to declare an arrow function in JavaScript?

16/25 Which event occurs when a user clicks on an HTML element in JavaScript?

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

18/25 What is the result of 'typeof NaN' in JavaScript?

19/25 What is the event loop in JavaScript?

20/25 What is the default scope of a variable declared with 'var' in JavaScript?

21/25 What will 'console.log(1 + '2' + '3')' output in JavaScript?

22/25 What is the correct syntax for creating a new Date object in JavaScript?

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

24/25 Which of the following is a correct method to create a new array?

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