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Q71. What is the output of the following code?
class C { public $x = 1;
function construct() { ++$this->x; } function invoke() { return ++$this->x; }
function toString() { return (string) --$this->x; }
}
$obj = new C(); echo $obj();
A. 0
B. 1
C. 2
D. 3
Answer: D
Q72. What will be the output value of the following code?
$array = array(1,2,3);
while (list(,$v) = each($array)); var_dump(current($array));
A. bool(false)
B. int(3)
C. int(1)
D. NULL
E. Array
Answer: A
Q73. 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, $destination_file);
Answer: C
Q74. What function allows resizing of PHP's file write buffer?
A. ob_start()
B. set_write_buffer()
C. stream_set_write_buffer()
D. Change the output_buffering INI setting via ini_set() function
Answer: C
Q75. Which of the following is NOT a valid function declaration?
A. function x ($x1 = array())
B. function x (A $x1)
C. function x (A $x1 = null)
D. function x ($x1 = $x2)
Answer: D
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Q76. From your PHP application, how can you send the same header twice, but with different values?
A. Set the second argument of the header() function to false
B. PHP does that automatically
C. You may only send a particular type of header once
D. Use the header_add() function
Answer: A
Q77. What is the output of this code?
$world = 'world'
echo <<<'TEXT' hello $world TEXT;
A. hello world
B. hello $world
C. PHP Parser error
Answer: C
Q78. CORRECT TEXT
What is the name of the key in $_FILES['name'] that contains the number of bytes of the uploaded file?
Answer: size
Q79. Which of the following is true about stream contexts? (Choose 2)
A. A context can modify or enhance the behavior of a stream
B. A context indicates what session the stream is part of
C. A context is a set of parameters and stream wrapper specific options
D. Contexts are created with new Stream_Context();
Answer: A,C
Q80. What is cached by an opcode cache?
A. Compiled PHP code
B. Native PHP extensions
C. Data sent to the client
D. Data received from the database
Answer: A