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2021 Sep 200-550 download
Q121. Which of the following techniques ensures that a value submitted in a form can only be yes or no?
A. Use a select list that only lets the user choose between yes and no .
B. Use a hidden input field that has a value of yes or no .
C. Enable the safe_mode configuration directive.
D. None of the above.
Answer: D
Q122. Which methods can be used to overload object properties? (Choose 2)
A. set(), get()
B. set(), get()
C. put(), receive(), exists()
D. set(), get(), isset()
E. isset(), unset()
Answer: B,E
Q123. When uploading a file to a PHP script using the HTTP PUT method, where would the file data be found?
A. the $_FILES super-global
B. the input stream php://input
C. the $_POST super-global
D. the global variable scope
Answer: B
Q124. After performing the following operations:
$a = array('a', 'b', 'c');
$a = array_keys(array_flip($a)); What will be the value of $a?
A. array('c', 'b', 'a')
B. array(2, 1, 0)
C. array('a', 'b', 'c')
D. None of the above
Answer: C
Q125. Which of the following are NOT acceptable ways to create a secure password hash in PHP? (Choose 2)
A. md5()
B. hash_pbkdf2()
C. password_hash()
D. crypt()
E. openssl_digest()
Answer: A,E
Update 200-550 exam question:
Q126. What is the output of the following code?
class Base {
protected static function whoami() { echo "Base ";
}
public static function whoareyou() { static::whoami();
}
}
class A extends Base { public static function test() { Base::whoareyou();
self::whoareyou(); parent::whoareyou();
A. :whoareyou(); static::whoareyou();
}
public static function whoami() { echo "A ";
}
}
class B extends A {
public static function whoami() { echo "B ";
}
}
B. :test();
C. B B B B B
D. Base A Base A B
E. Base B B A B
F. Base B A A B
Answer: C
Q127. Which of the following statements about Reflection is correct?
A. Reflection is an extension that can be disabled
B. Reflection is a new extension present only in PHP 5.3+
C. Reflection only allows to reflect on built-in classes
D. Built-in classes can be reflected on command line using php --rc <classname>
Answer: D
Q128. Transactions are used to...
A. guarantee high performance
B. secure data consistency
C. secure access to the database
D. reduce the database server overhead
E. reduce code size in PHP
Answer: B
Q129. Late static binding is used in PHP to:
A. Load dynamic libraries and extensions at runtime
B. Use caller class information provided in static method call
C. Resolve undefined class names by automatically including needed files
D. Find proper method to call according to the call arguments
Answer: B
Q130. CORRECT TEXT
Your supervisor wants you to disallow PHP scripts to open remote HTTP and FTP resources using PHP's file functions. Which php.ini setting should you change accordingly?
Answer: allow_url_fopen, allow_url_fopen=off, allow_url_fopen=Off, allow_url_fopen = off, allow_url_fopen = Off