JavaScript Basics Knowledge Test

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1. 1

   What is the correct syntax to print a message to the console in JavaScript?

   A console.print('Hello World') B console.log('Hello World') C print.console('Hello World')
2. 2

   Which company developed JavaScript?

   A Netscape B Microsoft C Google
3. 3

   What is the use of isNaN function in JavaScript?

   A To check if a value is a number B To verify if a value is a string C To check if a value is not a number
4. 4

   In JavaScript, which operator is used to compare both value and type?

   A === B == C =
5. 5

   How do you create a function in JavaScript?

   A function myFunction() = {} B function myFunction() {} C myFunction() = function {}
6. 6

   Which of the following is a proper way to define a variable in ES6?

   A let x = 10; B const var x = 10; C variable x = 10;
7. 7

   What does the 'this' keyword refer to in JavaScript?

   A The function object B The current object C The parent object
8. 8

   Which of the following is the correct way to implement a comment in JavaScript?

   A <!-- This is a comment --> B ' This is a comment C // This is a comment
9. 9

   Which method is used to round a number to the nearest integer in JavaScript?

   A Math.round() B Math.floor() C Math.ceil()
10. 10

    How can you add an element to the end of an array in JavaScript?

    A array.insert('element') B array.addLast('element') C array.push('element')