Zend 200-550 Online Practice Questions and Exam Preparation

Zend 200-550 Online Questions & Answers

• Question 101:

  What is the output of the following code?

  class Bar {

  private $a = 'b';

  public $c = 'd';

  }

  $x = (array) new Bar();

  echo array_key_exists('a', $x) ? 'true' : 'false';

  echo '-';

  echo array_key_exists('c', $x) ? 'true' : 'false';

  A. false-false
  B. false-true
  C. true-false
  D. true-true
  B. false-true

• Question 102:

  Transactions should be used to: (Choose 2) A. Prevent errors in case of a power outage or a failure in the SQL connection

  B. Ensure that the data is properly formatted
  C. Ensure that either all statements are performed properly, or that none of them are.
  D. Recover from user errors
  C. Ensure that either all statements are performed properly, or that none of them are.

• Question 103:

  Which of the following code snippets is correct? (Choose 2)

  A. interface Drawable {abstract function draw();}
  B. interface Point {function getX();function getY();}
  C. interface Line extends Point {function getX2();function getY2();}
  D. interface Circle implements Point {function getRadius();}
  B. interface Point {function getX();function getY();}
  C. interface Line extends Point {function getX2();function getY2();}

• Question 104:

  Consider the following table data and PHP code, and assume that the database supports transactions.

  What is the outcome?

  Table data (table name "users" with primary key "id"):

  id name email

  1 anna [email protected]

  2 betty [email protected]

  3 clara [email protected]

  5 sue [email protected]

  PHP code (assume the PDO connection is correctly established):

  $dsn = 'mysql:host=localhost;dbname=exam';

  $user = 'username';

  $pass = '********';

  $pdo = new PDO($dsn, $user, $pass);

  try {

  $pdo->exec("INSERT INTO users (id, name, email) VALUES (6, 'bill', '[email protected]')"); $pdo- >begin();

  $pdo->exec("INSERT INTO users (id, name, email) VALUES (7, 'john', '[email protected]')"); throw new Exception();

  } catch (Exception $e) {

  $pdo->rollBack();

  }

  A. The user 'bill' will be inserted, but the user 'john' will not be.
  B. Both user 'bill' and user 'john' will be inserted.
  C. Neither user 'bill' nor user 'john' will be inserted.
  D. The user 'bill' will not be inserted, but the user 'john' will be.
  A. The user 'bill' will be inserted, but the user 'john' will not be.

• Question 105:

  What content-type is required when sending an HTTP POST using JavaScript to ensure that PHP can access the data?

  A. application/x-www-form-urlencoded
  B. http/post
  C. text/html
  D. object/multipart-formdata
  A. application/x-www-form-urlencoded

• Question 106:

  Which of the following PHP values may NOT be encoded to a JavaScript literal using PHP's ext/json capabilities?

  A. 'Hello, world!'
  B. function(){ alert("Hello, world!"); }
  C. array('Hello, world!')
  D. array('message' => 'Hello, world!')
  B. function(){ alert("Hello, world!"); }

• Question 107:

  What is the output of the following code?

  function ratio ($x1 = 10, $x2)

  {

  if (isset ($x2)) {

  return $x2 / $x1;

  }

  }

  echo ratio (0);

  B. An integer overflow error
  C. A warning, because $x1 is not set
  D. A warning, because $x2 is not set
  E. A floating-point overflow error
  F. Nothing
  D. A warning, because $x2 is not set

• Question 108:

  What function can be used to retrieve an array of current options for a stream context?

  A. stream_context_get_params
  B. stream_context_get_default
  C. stream_context_get_options
  D. The 'options' element of the stream_get_meta_data return value
  C. stream_context_get_options

• Question 109:

  Which technique should be used to speed up joins without changing their results?

  A. Add indices on joined columns
  B. Add a WHERE clause
  C. Add a LIMIT clause
  D. Use an inner join
  A. Add indices on joined columns

• Question 110:

  Which options do you have in PHP to set the expiry date of a session?

  A. Set the session.duration directive in php.ini
  B. Set session cookie expiry date locally via session_set_cookie_params()
  C. Set session expiry date locally via session_cache_expire()
  D. None of the above
  D. None of the above