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Building Database Applications in PHP Week 3 Practice Quiz Answer

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Sessions

Question 1) How does a web server recognize a particular web browser?

• Web link
• None of these
• Name
• Cookies

Question 2) The Web is a stateful system.

• True
• False

Question 3) The browser does not always maintain a connection to the server.

• True
• False

Question 4) Cookies can be made to last for how long?

• Minutes
• Months
• Till the session ends
• Any of these

 Question 5)If a browser is contacting a server for the very first time, the browser does not send cookies in its first request.

• True
• False

Question 6) Sessions are server controlled and are protected from the users direct access to it.

• True
• False

Question 7) session_start() is used to

• Relocate a session
• Restore an old session
• Rename a session
• Make a new session

 Question 8) session_start() can be placed anywhere in the php file.

• True
• False

Question 9) The [_____] function is used to remove a session.

• session_destroy

Question 10) $_SESSION is a

• Associative array
• All of these
• Super global variable
• Variable that stores session details

Question 11) PHP applications can make changes to the $_SESSION variable.

• True
• False

Question 12) End users can make changes to the $_SESSION variable.

• True
• False

Question 13) Generally, if there are no cookies for a web site in the browser, PHP will make a new session as soon as the user tries to access the url.

• True
• False

Question 14) When do session cookies expire?

• After two hours
• After the expire date passes
• When the browser is closed
• After the user closes a tab on their browser
• After 24 hours

Question 15) Where are non-session cookies stored?

• In the cloud on a separate memcached server 
• On the hard drive of the PHP server
• In the database on the server
• On the hard drive of the user’s computer
• In the memory of the PHP server

Question 16) What is the typical session identifier?

• A large random number chosen by the server
• The MD5 hash of the user’s email address
• The MD5 hash of the domain name of the server
• A large random number chosen by the browser
• The number of seconds since January 1, 1970

Question 17) If a browser does not support cookies, how can PHP maintain a session?

• By including the session identifier as a parameter every GET and POST request
• By using an MD5 hash of the user’s email address as the session identifier
• By using the “secure cookie” header to force the browser to set a cookie
• By using the browser’s network address as the session identifier