True/False
Indicate whether the
statement is true or false.
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1.
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One way to preserve information following a user’s visit to a Web page is
to append a query string to the end of a URL.
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2.
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For a Web page to use the information in a query string, your JavaScript program
must first parse the string.
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3.
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Query strings permanently maintain state information.
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4.
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Hidden form fields maintain state information between Web pages, and the data
they contain are kept once the Web page that reads the hidden fields closes.
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5.
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The Web was originally designed to be read-only.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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6.
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HTTP was originally designed to be ____, which means that Web browsers stored no
persistent data about a visit to a Web site.
a. | stateless | c. | state-aware | b. | statefull | d. | state-active |
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7.
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You create hidden form fields with the ____ element.
a. | <state> | c. | <input> | b. | <information> | d. | <hidden> |
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8.
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The only attributes that you can include with a hidden form field are the name and ____ attributes.
a. | expires | c. | secure | b. | path | d. | value |
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9.
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You can use a(n) ____ to pass information, such as search criteria, from one Web
page to another.
a. | text area | c. | label | b. | query string | d. | image button |
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10.
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To pass data from one Web page to another using a query string, add a(n) ____
immediately after a URL, followed by the query string (in name=value pairs) for the information you
want to preserve.
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11.
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You separate individual name=value pairs within the query string using
____.
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12.
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The ____ property of the Location
object contains a URL’s query or search parameters.
a. | query | c. | parameters | b. | arguments | d. | search |
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13.
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To make it possible to store state information beyond the current Web page
session, Netscape created ____.
a. | cookies | c. | hidden form fields | b. | scripts | d. | query strings |
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14.
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____ cookies remain available only for the current browser session.
a. | Persistent | c. | Local | b. | Temporary | d. | Global |
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15.
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____ cookies remain available beyond the current browser session and are stored
in a text file on a client computer.
a. | Persistent | c. | Local | b. | Global | d. | Temporary |
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16.
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You use the ____ property of the Document object to create cookies in name=value pairs.
a. | query | c. | hidden | b. | state | d. | cookie |
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17.
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The cookie property is created with a required ____
attribute and four optional attributes: expires, path, domain, and secure.
a. | value | c. | name | b. | string | d. | size |
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18.
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You can use special characters in your cookies if you use ____.
a. | encoding | c. | strings | b. | Unicode | d. | URIs |
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19.
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The built-in ____ function is used in JavaScript for encoding the individual
parts of a URI.
a. | encodeCookie() | c. | encodeURIComponent() | b. | encodeURLComponent() | d. | encodeComponent() |
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20.
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When you read a cookie or other text string encoded with the encodeURIComponent() function, you must first decode
it with the ____ function.
a. | parseURI() | c. | decodeURLComponent () | b. | parseCookie() | d. | decodeURIComponent () |
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21.
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The ____ attribute of the cookie
property determines how long a cookie can remain on a client system before it is
deleted.
a. | path | c. | secure | b. | expires | d. | domain |
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22.
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The ____ attribute determines the availability of a cookie to other Web pages on
a server.
a. | domain | c. | path | b. | secure | d. | expires |
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23.
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The ____ attribute is used for sharing cookies across multiple servers in the
same domain.
a. | expires | c. | path | b. | domain | d. | secure |
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24.
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The ____ attribute indicates that a cookie can only be transmitted across a
secure Internet connection using HTTPS or another security protocol.
a. | domain | c. | path | b. | expires | d. | secure |
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25.
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____ refers to the writing of code in such a way that minimizes any intentional
or accidental security issues.
a. | Secure coding | c. | Seal coding | b. | Bulletproofing | d. | Strong coding |
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26.
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The ____ property of the Document
object changes the origin of a document to its root domain name.
a. | root | c. | environment | b. | domain | d. | path |
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Completion
Complete each
statement.
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27.
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Information about individual visits to a Web site is called
____________________.
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28.
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A special type of form element, called a(n) ____________________, is not
displayed by the Web browser and therefore allows you to hide information from users.
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29.
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A(n) ____________________ is a set of name=value pairs appended to a target
URL.
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30.
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The passed query string is assigned to the ____________________ property of the
target Web page Location object.
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31.
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____________________ are small pieces of information about a user that are
stored by a Web server in text files on the user’s computer.
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Matching
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Match each item with a statement below: a. | hidden form field | f. | toUTCString() | b. | query string | g. | path
attribute | c. | cookies | h. | SSL | d. | name
attribute | i. | secure
coding | e. | encodeURIComponent() |
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32.
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Also known as defensive coding
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33.
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Converts the Date object to a string, formatting it
in Coordinated Universal Time
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34.
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Temporarily stores data that needs to be sent to a server along with the rest
of a form, but that a user does not need to see
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35.
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Encrypts data and transfers it across a secure connection
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36.
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The only required parameter of the cookie
property
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37.
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Allows cookies to be shared across a server
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38.
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Consists of a single text string containing one or more pieces of
information
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39.
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Converts special characters in the individual parts of a URI to their
corresponding hexadecimal ASCII value, preceded by a percent sign
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40.
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Originally created for use with CGI scripts, but are now commonly used by
JavaScript and other scripting languages
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Short Answer
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41.
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Describe the advantages and disadvantages of the original stateless design of
the Web.
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42.
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What are some of the reasons for maintaining state information?
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43.
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How can you remove the question mark at the start of the query string?
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44.
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How can you convert the individual pieces of information in a query string into
array elements?
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45.
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What are some of the limitations on the use of cookies that are enforced by Web
browsers?
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46.
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How can you use special characters in your cookies?
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47.
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Why should you manually encode and decode cookies?
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48.
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Why should you delete persistent cookies that your program does not need?
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49.
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What are the steps to parse a cookie?
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50.
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What are the security areas of most concern to JavaScript programmers?
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