Javascript Certification #5

Question 1

Consider the following code block. What will be the output of this code block?

Accepted Answer

undefined

Question 2

Which of the following is not true of the <canvas> element?

Accepted Answer

It has drawing capabilities of its own.

Question 3

Which HTML element serves as a container for graphics on a Web page?

Accepted Answer

Question 4

Which of the following hierarchical dot notations is an invalid reference?

Accepted Answer

document.history

Question 5

Which of the following is true of the getElementById() method?

Accepted Answer

Returns first element in the document with the specified id.

Question 6

Which of the following characters is used by jQuery as a reference to itself?

Accepted Answer

$

Question 7

Which form object is used to mask the value entered by a user?

Accepted Answer

password

Question 8

Consider the following code block. What will be the output of this code snippet?

Accepted Answer

10

Question 9

Which of the following constitutes an XSS attack?

Accepted Answer

A hyperlink that carries malicious content

Question 10

Which of the following is a disadvantage associated with the use of JavaScript frameworks?

Accepted Answer

JavaScript frameworks are large in size.

Question 11

Which of the following technologies is not based on JavaScript?

Accepted Answer

Java

Question 12

Which of the following error types are the hardest to debug?

Accepted Answer

Logic

Question 13

Which method can be used to increase option elements in a select statement?

Accepted Answer

add()

Question 14

Which of the following statements will execute only if the conditions A and B are true?

Accepted Answer

if (A && B)

Question 15

Why does Array.sort() produce unreliable results when elements of an array are numbers?

Accepted Answer

sort() treats numbers as strings and sorts them accordingly.

Question 16

Which event handler executes code when the value of an element is modified from the default?

Accepted Answer

onchange

Question 17

Which of the following is true of the variables declared using let and const?

Accepted Answer

const initialized at declaration, let initialized anywhere.

Question 18

Which of the following statements will select elements that have multiple classes?

Accepted Answer

document.getElementsByClassName("class1 class2 ")

Question 19

Which of the following languages is not a scripting language?

Accepted Answer

Java

Question 20

Consider the following statement, and identify the type of error in the block (if any).

Accepted Answer

Run-time

Question 21

Which of the following items will be accessible even after a browser is closed?

Accepted Answer

CIW

Questions 21