Zend 200-550 Online Practice Questions and Exam Preparation

Zend 200-550 Online Questions & Answers

• Question 31:

  Given a DateTime object that is set to the first second of the year 2014, which of the following samples will correctly return a date in the format '2014-01-01 00:00:01'?

  A. $datetime->format('%Y-%m-%d %h:%i:%s')
  B. $datetime->format('%Y-%m-%d %h:%i:%s', array('year', 'month', 'day', 'hour', 'minute', 'second'))
  C. $datetime->format('Y-m-d H:i:s')
  D. $date = date('Y-m-d H:i:s', $datetime);
  C. $datetime->format('Y-m-d H:i:s')

• Question 32:

  How many times will the function counter() be executed in the following code?

  function counter($start, and$stop)

  {

  if ($stop > $start)

  {

  return;

  }

  counter($start--, ++$stop);

  }

  $start = 5;

  $stop = 2;

  counter($start, $stop);

  A. 3
  B. 4
  C. 5
  D. 6
  C. 5

• Question 33:

  What will an opcode cache ALWAYS automatically improve?

  A. Running time of a loop in a PHP script
  B. Efficiency of HTML markup generated by a PHP script
  C. Execution speed of a PHP script
  D. Memory footprint of a PHP script
  E. None of the above
  E. None of the above

• Question 34:

  An unbuffered database query will: (Choose 2)

  A. Return the first data faster
  B. Return all data faster
  C. Free connection faster for others scripts to use
  D. Use less memory
  A. Return the first data faster
  D. Use less memory

• Question 35:

  In order to create an object storage where each object would be stored only once, you may use which of the following? (Choose 2)

  A. SplFixedArray
  B. SplObjectStorage
  C. SplString
  D. spl_object_hash
  E. spl_same_object
  B. SplObjectStorage
  D. spl_object_hash

• Question 36:

  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();

  B. 1
  C. 2
  D. 3
  D. 3

• Question 37:

  Consider the following table data and PHP code. 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);

  $cmd = "SELECT * FROM users WHERE id = :id";

  $stmt = $pdo->prepare($cmd);

  $id = 3;

  $stmt->bindParam('id', $id);

  $stmt->execute();

  $stmt->bindColumn(3, $result);

  $row = $stmt->fetch(PDO::FETCH_BOUND);

  A. The database will return no rows.
  B. The value of $row will be an array.
  C. The value of $result will be empty.
  D. The value of $result will be '[email protected]'.
  D. The value of $result will be '[email protected]'.

• Question 38:

  You need to escape special characters to use user input inside a regular expression. Which functions would you use? (Choose 2)

  A. addslashes()
  B. htmlentities()
  C. preg_quote()
  D. regex_quote()
  E. quote_meta()
  C. preg_quote()
  E. quote_meta()

• Question 39:

  What is the method used to execute XPath queries in the SimpleXML extension?

  A. xpathQuery()
  B. xpath()
  C. simpleXMLXpath()
  D. query()
  E. evaluate()
  B. xpath()

• Question 40:

  What is the output of the following code?

  for ($i = 0; $i < 1.02; $i += 0.17) {

  $a[$i] = $i;

  }

  echo count($a);

  B. 1
  C. 2
  D. 6
  E. 7
  B. 1