JavaScript Mcqs Test Online

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Question 1

1. How does JavaScript store dates in a date object?

Answer

The number of days since January 1st, 1900

Answer

The number of seconds since Netscape's public stock offering.

Answer

The number of milliseconds since January 1st, 1970

Answer

None of the above

Question 2

2. Which is the correct order of precedence of Arithmetic operators?

Question 3

3. _____ JavaScript statements embedded in an HTML page can respond to user events such as mouse-clicks, form input, and page navigation?

Answer

Server-side

Answer

Client-side

Question 4

4. Which of the following attribute can hold the JavaScript version?

Answer

None of the above

Question 5

5. What are variables used for in JavaScript Programs?

Answer

Varying randomly

Answer

Causing high-school algebra flashbacks

Answer

Storing numbers, dates, or other values

Answer

None of the above

Question 6

6. __________ JavaScript is also called server-side JavaScript?

Question 7

7. Which of the following is not a valid JavaScript variable name?

Answer

_first_and_last_names

Answer

FirstAndLast

Answer

None of the above

Question 8

8. Consider the following code snippet

data.sort(function(a,b),b-a);

What does the above code do?

Answer

Sort in the alphabetical order

Answer

Sort in reverse alphabetical order

Answer

Sort in the chronological order

Answer

Sort in reverse numerical order

Question 9

9. Why so JavaScript and Java have similar name?

Answer

They both originated on the island of Java

Answer

JavaScript is a stripped-down version of Java

Answer

JavaScript's syntax is loosely based on Java's

Answer

None of the above

Question 10

10. Consider the following code snippet

let succ = function(x) x+1, yes = function() true, no = function() false;

What convenience does the above code snippet provide?

Answer

Shorthand expression

Answer

Modular behaviour

Answer

Functional behaviour

Answer

No convenience

Question 11

11. What is the correct JavaScript syntax to write "Hello World"?

Answer

System.out.println("Hello World")

Answer

println ("Hello World")

Answer

response.write("Hello World")

Answer

document.write("Hello World")

Question 12

12. ______ tag is an extension to HTML that can enclose any number of JavaScript statements?

Question 13

15. JavaScript variables are case-sensitive?

Question 14

16. What is the code to be used to trim whitespaces ?

Answer

let trimmed = for(l in lines));

Answer

let trimmed = (trim(l));

Answer

let trimmed = (l.trim() for (l in lines));

Answer

let trimmed = l.trim();

Question 15

17. Which of the following is not a valid JavaScript variable name?

Answer

None of the above

Question 16

18. The __ operator determines whether an object is an instance of another object?

Answer

instanceof

Question 17

19. The __ operator determines the type of a given object?

Answer

instanceof

Question 18

20. Which of the following can't be done with client-side JavaScript?

Answer

Sending a form's contents by email

Answer

None of the above

Answer

Storing the form's contents to a database file on the server

Answer

Validating a form

Question 19

21. What is the output of this expression? x = 2 + "2"; document.write(x)?

Answer

Syntax Error

Question 20

22. ______ JavaScript is also called client-side JavaScript?

Question 21

23. Which of the following are capabilities of functions in JavaScript?

Answer

None of the above

Answer

Return a value

Answer

Accept parameters and Return a value

Answer

Accept parameters

Question 22

24. What is the alternate name for Java script?

Answer

ECMAScript

Answer

Coffee Script

Answer

LimeScript

Question 23

25. What should appear at the very end of your JavaScript?
The <script LANGUAGE="JavaScript">tag

Answer

The

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Total Questions:	25
Time Allowed:	10 Minutes
Total Marks:	25
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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JavaScript Mcqs Test Online