zend 200-550 practice test

What is the output of the following code?
echo "22" + "0.2", 23 . 1;

• A. 220.2231
• B. 22.2231
• C. 22.2,231
• D. 56.2

What is the output of the following code?
$first = "second";
$second = "first";
echo $$$first;

• A. "first"
• B. "second"
• C. an empty string
• D. an error

What is the output of the following code?
$first = "second";
$second = "first";
echo $$$first;

• A. "first"
• B. "second"
• C. an empty string
• D. an error

Which of the following code snippets DO NOT write the exact content of the file "source.txt" to
"target.txt"? (Choose 2)

• A. file_put_contents("target.txt", fopen("source.txt", "r"));
• B. file_put_contents("target.txt", readfile("source.txt"));
• C. file_put_contents("target.txt", join(file("source.txt"), "\n"));
• D. file_put_contents("target.txt", file_get_contents("source.txt")); E: $handle = fopen("target.txt", "w+"); fwrite($handle, file_get_contents("source.txt")); fclose($handle);

What is the recommended method of copying data between two opened files?

• A. copy($source_file, $destination_file);
• B. copy($destination_file, $source_file);
• C. stream_copy_to_stream($source_file, $destination_file);
• D. stream_copy_to_stream($destination_file, $source_file); E: stream_bucket_prepend($source_file, $destination_file);

Which of the following will set a 10 seconds read timeout for a stream?

• A. ini_set("default_socket_timeout", 10);
• B. stream_read_timeout($stream, 10);
• C. Specify the timeout as the 5th parameter to the fsockopen() function used to open a stream
• D. stream_set_timeout($stream, 10); E: None of the above

What function allows resizing of PHP's file write buffer?

• A. ob_start()
• B. set_write_buffer()
• C. stream_set_write_buffer()
• D. Change the output_buffering INI setting via ini_set() function

What does the __FILE__ constant contain?

• A. The filename of the current script.
• B. The full path to the current script.
• C. The URL of the request made.
• D. The path to the main script.

What can prevent PHP from being able to open a file on the hard drive (Choose 2)?

• A. File system permissions
• B. File is outside of open_basedir
• C. File is inside the /tmp directory.
• D. PHP is running in CGI mode.

What purpose do namespaces fulfill?

• A. Encapsulation
• B. Alternative to classes
• C. Improved performance
• D. All of the above