Ajax takes advantage of ________ scripting to make applications more responsive.

Question

Ajax takes advantage of ________ scripting to make applications more responsive.
a) server-side
b) PHP
c) client-side
d) XML

Ajax applications respond to user actions by making ________ requests to a web server.
a) synchronous
b) asynchronous
c) contiguous
d) asymmetric

When an XMLHttpRequest object receives a response from the server, it invokes a ________, which usually performs a ________ to display the retreived data.
a) recursive function, browser reload
b) anonymous function, browser redirect
c) callback function, partial page update
d) delayed function, database query

If the code in a try block causes an exception, execution passes to ________.
a) the next line of the try block
b) the next function
c) the corresponding catch block
d) the corresponding error block

The XMLHttpRequest object parses an XML response into a DOM tree and stores it in the ________ property.
a) response
b) responseXML
c) xmlData
d) responseTree

JavaScript was primarily designed to run in which tier of a three-tier web application?
a) user interface (top) tier
b) business logic (middle) tier
c) information (bottom) tier
d) None of the above.

Which tier typically contains a relational database?
a) user interface (top) tier
b) business logic (middle) tier
c) information (bottom) tier
d) None of the above.

SQL is a ________.
a) relational database
b) non-relational database
c) language for creating database queries and manipulating data
d) personal relational database

Each table column in a relational detabase represents a different ________.
a) data attribute
b) primary key
c) record
d) result set

There is a(n) ________ relationship between a primary key and its corresponding foreign key.
a) one-to-one
b) one-to-many
c) many-to-one
d) inverse

The following SQL query:

   SELECT * FROM TableName

a) generates an error.
b) selects all rows from the table TableName.
c) selects all columns from the table TableName.
d) selects all rows and columns from the table TableName.

The ________ SQL statement is used to change existing data in a table.
a) EDIT
b) UPDATE
c) CHANGE
d) MODIFY

MySQL functions on the ________ platform.
a) Windows
b) Linux
c) UNIX
d) All of the above

Which of the following are PHP data types?
a) integers, strings and text
b) integers, floating point numbers and text
c) integers, floating point numbers and strings
d) integers, strings and text

Arrays must be indexed with which of the following data types?
a) integers only
b) either an integer or a string
c) an integer, string, or floating point number
d) either an integer or a floating point number

Which of the following can be used to compare strings?
a) ==
b) !=
c) <=
d) All of the above.

GET and POST data sent to a PHP script are accessible using the ________ and ________ superglobal arrays.
a) $GET, $POST
b) $GETDATA, $POSTDATA
c) $CLIENT, $SERVER
d) $_GET, $_POST

A cookie that lasts only until the browser is closed is called a ________ cookie.
a) session
b) persistent
c) temporary
d) timed

Explanation / Answer

1) c) Client Side

Ajax takes advantage of client-side scripting to make applications more responsive.

2) b) Asynchronous

Ajax applications respond to user actions by making asynchronous requests to a web server.

3) c) Callback function, partial page update

  When an XMLHttpRequest object receives a response from the server, it invokes a callback function , which usually performs a partial page update  to display the retreived data.

4) c) The corresponding catch block

  If the code in a try block causes an exception, execution passes to the corresponding catch block

5) b) responseXML

  The XMLHttpRequest object parses an XML response into a DOM tree and stores it in the responseXML property.

6) a) User interface (top) tier

  JavaScript was primarily designed to run in user interface (top) tier of a three-tier web application.

7) c) Information (bottom) tier

  Information (bottom) tier typically contains a relational database.

8) c) Language for creating database queries and manipulating data

SQL (Structured Query Language) is a language for creating database queries and manipulating data .

9) a) Data attribute

Each table column in a relational detabase represents a different data attribute .

10) b) one-to-many

There is an one-to-many relationship between a primary key and its corresponding foreign key.

11) d) selects all rows and columns from the table TableName.

The following SQL query:

SELECT * FROM TableName selects all rows and columns from the table TableName.

12) b) UPDATE

The UPDATE SQL statement is used to change existing data in a table.

13) d) All of the above

  MySQL functions on the Windows, LINUX, UNIX (All of the above) platforms.

14) c) integers, floating point numbers and strings

  Integers, floating point numbers and strings are PHP data types.

15) a) integers only

Arrays must be indexed with integer data types.

16) d) All of the above.

  ==, !=, <= (All of the above) can be used to compare strings.

17) d) $_GET, $_POST

GET and POST data sent to a PHP script are accessible using the $_GET and $_POST superglobal arrays.

18) a) session

A cookie that lasts only until the browser is closed is called a session cookie.

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