Javascript Interview Questions - 45 | Snaprecruit.com

Javascript Interview Questions - 45 | Snaprecruit.com

Javascript interview questions part 45

Javascript interview questions part 45

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Total Questions: 20

1. Which is the function that is called to validate a data?

Correct Answer is : none of the mentioned

2. How to find the index of a particular string?

Correct Answer is : indexOf()

3. How do you focus a particular part of the HTML page in JavaScript?

Correct Answer is : focus()

4. Which of the following is the child object of the JavaScript navigator?

Correct Answer is : Plugins

5. Which of the following are the properties of a plug-in entry?

Correct Answer is : all of the mentioned

6. What is the purpose of the mimeTypes property of a plug-in entry?

Correct Answer is : Contains MIME types

7. Which of the following is a stateless protocol?

Correct Answer is : HTTP

8. What does the value 2 of the WebSocket attribute Socket.readyState indicate?

Correct Answer is : Handshake connection

9. How many WebSocket events are available?

Correct Answer is : 4

10. Which method is used to close the WebSocket?

Correct Answer is : Socket.close()

11. How does the client and the server communicate following the rules defined by the WebSocket protocol?

Correct Answer is : Long-lived TCP Socket

12. Which of the following is not a socket property?

Correct Answer is : ready

13. Consider the following one-line code. var httpserver = new http.Server(); What does the above code do?

Correct Answer is : Create an HTTP Server

14. How can we check the subprotocol being used by the client?

Correct Answer is : protocol property

15. How will you transmit data using the connection?

Correct Answer is : Socket.send(data)

16. Which of the following is not a WebSocket event?

Correct Answer is : deny

17. Which of the following is one of the fundamental features of JavaScript?

Correct Answer is : Single-threaded

18. Which of the following functions are synchronous?

Correct Answer is : both load() and require()

19. Why shouldn’t JavaScript functions not be too long?

Correct Answer is : All of the mentioned

20. The object that looks to the thread that creates it is

Correct Answer is : Worker

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