Available Questions About JavaScript Quizzes

1. console.log(2 + '2');

• "22"
• "4"
• 22
• 4

2. What does typeof null return in JavaScript?

• "object"
• "null"
• "undefined"
• "number"

3. Which method is used to add elements to the end of an array in JavaScript?

• pop()
• shift()
• push()
• unshift()

4. console.log([] == []);

• true
• false
• undefined
• null

5. What is the purpose of the bind() method in JavaScript?

• To create a new function with a specified this value and arguments
• To immediately invoke a function
• To define a method in an object
• To bind an event listener to an element

6. What does the this keyword refer to in a JavaScript function?

• The function itself
• The global object
• The object that owns the method
• The parent object

7. console.log(0.1 + 0.2 === 0.3);

• true
• false
• undefined
• null

8. How do you declare a variable that is not accessible outside of a function in JavaScript?

• var
• let
• const
• let

9. console.log(1 + '1' - 1);

• 11
• 1
• '1'
• 10

10. What is the purpose of the setTimeout() function in JavaScript?

• To delay the execution of a function by a specified time
• To execute a function immediately
• To set a time interval for repeating execution
• To wait for user input