QUESTION 21 An arithmetic operator that works with two items in an expression is

Question

QUESTION 21

An arithmetic operator that works with two items in an expression is called a ____ operator.

binary

unary

secondary

logical

5 points   

QUESTION 22

An external style sheet written in the CSS language should have the file name extension ____.

.txt

.html

.css

.cs

5 points   

QUESTION 23

External files containing JavaScript commands and functions always have the file extension ____.

“.java”

“.jsc”

“.txt”

“.js”

5 points   

QUESTION 24

If you add an item to an array but do not define it, it will have a ____ value.

-1

0

1

null

5 points   

QUESTION 25

In JavaScript, the ____ is used to combine two text strings into a single string.

backslash ( )

underscore character ( _ )

ampersand character ( & )

plus symbol ( + )

5 points   

QUESTION 26

In ____-side programming, the program that is used to modify the contents and structure of Web pages is run on each user’s own computer.

applet

script

server

client

5 points   

QUESTION 27

In a(n) ____ statement, different commands are run based upon different possible values of a variable.

If...Else

For loop

If

Switch

5 points   

QUESTION 28

The HTML ____ element is used to access an external script file.

<script file=“url”></script>

<script href=“mime-href” src=“url”></script>

<script type=“mime-type” src=“url”></script>

<script scope=“mime-scope” href=“url”></script>

5 points   

QUESTION 29

The ____ event handler is called when the user has pressed a key.

onkeypress

onclick

onkeydown

onkey

5 points   

QUESTION 30

The ____ expression is equivalent to the expression x = x + 1;

x++;

x = x;

x = 1;

x = ++;

a.

binary

b.

unary

c.

secondary

d.

logical

Explanation / Answer

21 Answer. a) Binary operator. because unary operator works with one item in an expression, A secondary operator is a person(s) associated with a construction activity whose operational control is limited to: 1. the employment of other operators. or 2. the ability to approve or disapprove changes to the construction plans and specifications whereas logical operators can be applied between two or more expressions which involves two or more items in each expression.

So the answer is Binary Operator i.e., option: a

22) Answer: c) .css

because .txt is extension of notepad files, .html is extension of static webpages, and .cs is extension of c# files.

23) Answer: d) .js

.java is extension of java files. .jsc is extension of java script config file and .txt is text file

24) Answer: b) 0

25) Answer: d) plus symbol(+)

26) Answer: b) script.

27) Answer: b) For loop

28) Answer: c) <script type= "mime-type" src="url"></script>

29) Answer: a) onkeypress.

30) Answer: a) x++;

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