Page 1
JavaScript Certification Test Latest
Questions and Correct Answers
Which of the following escape sequences will print the
backslash character?
Ans: \\
Which of the following characters matches the start of a line
in a regular expression
Ans: ^
What is the main role of JavaScript in an AJAX transaction?
Ans: To request XML or plain text data from a web
server
Which property is used to add CSS styles to elements in a
Web Page?
Ans: HTMLElement.style
What is a bug in the JavaScript code?
Ans: An error in the code
Which of the following is not a valid property?
, Page 2
Ans: coords.timestamp
What readyState value specifies that the response header has
been received, but the message body is yet to be received?
Ans: 3
Which of the following casting rules is incorrect when
concatenating? (true is a Boolean value)
Ans: 9 + true equals "9true"
Which of the following statements is true of semicolons in
JavaScript?
Ans: Semicolons are essential while combining separate
statements in a line
Which statement is false in reference of XSS attacks?
Ans: They cannot be performed through emails or mail
clients
Sarah has created a JavaScript library, and now she wants to
include it in her document. Which of the following statements
follows the correct syntax to link the library in her document?
Ans: <script type="text/javascript"
src="library.js"></script>
, Page 3
Which of the following information is not a part of the cookie
header?
Ans: expires = date
Which of the following is not true of JavaScript plug-in?
Ans: Plug-ins cannot be used without the library they
depend upon; Every pre-made script is a library
How can a cookie be deleted using JavaScript?
Ans: By setting a passed expiration date
Which event is triggered on the <select> element when the
selection is modified?
Ans: onchange
Which of the following methods will remove all the data from
the storage?
Ans: localStorage.clear();
Which of the following initializes the HTTP request in an
AJAX transaction?
Ans: The open() method
JavaScript Certification Test Latest
Questions and Correct Answers
Which of the following escape sequences will print the
backslash character?
Ans: \\
Which of the following characters matches the start of a line
in a regular expression
Ans: ^
What is the main role of JavaScript in an AJAX transaction?
Ans: To request XML or plain text data from a web
server
Which property is used to add CSS styles to elements in a
Web Page?
Ans: HTMLElement.style
What is a bug in the JavaScript code?
Ans: An error in the code
Which of the following is not a valid property?
, Page 2
Ans: coords.timestamp
What readyState value specifies that the response header has
been received, but the message body is yet to be received?
Ans: 3
Which of the following casting rules is incorrect when
concatenating? (true is a Boolean value)
Ans: 9 + true equals "9true"
Which of the following statements is true of semicolons in
JavaScript?
Ans: Semicolons are essential while combining separate
statements in a line
Which statement is false in reference of XSS attacks?
Ans: They cannot be performed through emails or mail
clients
Sarah has created a JavaScript library, and now she wants to
include it in her document. Which of the following statements
follows the correct syntax to link the library in her document?
Ans: <script type="text/javascript"
src="library.js"></script>
, Page 3
Which of the following information is not a part of the cookie
header?
Ans: expires = date
Which of the following is not true of JavaScript plug-in?
Ans: Plug-ins cannot be used without the library they
depend upon; Every pre-made script is a library
How can a cookie be deleted using JavaScript?
Ans: By setting a passed expiration date
Which event is triggered on the <select> element when the
selection is modified?
Ans: onchange
Which of the following methods will remove all the data from
the storage?
Ans: localStorage.clear();
Which of the following initializes the HTTP request in an
AJAX transaction?
Ans: The open() method
