Zend Zend Certifications 200-550 Questions & Answers

• Question 181:

  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]'.

  Correct Answer: D

• Question 182:

  Which MIME type is always sent by a client if a JPEG file is uploaded via HTTP?

  A. image/jpeg

  B. image/jpg

  C. image/pjpeg

  D. Depends on the client system

  Correct Answer: D

• Question 183:

  Your application uses PHP to accept and process file uploads. It fails to upload a file that is 5 MB in size, although upload_max_filesize is set to "10M". Which of the following configurations could be responsible for this outcome? (Choose 2)

  A. The PHP configuration option post_max_size is set to a value that is too small

  B. The web server is using an incorrect encoding as part of the HTTP response sent to the client

  C. The browser uses an incorrect encoding as part of the HTTP request sent to the server

  D. The hidden form field MAX_FILE_SIZE was set to a value that is too small

  E. PHP cannot process file uploads larger than 4 MB

  Correct Answer: AD

• Question 184:

  Which of the following is used to find all PHP files under a certain directory?

  A. PHPIterator

  B. RecursiveTreeIterator

  C. RecursiveDirectoryIterator

  D. SplTempFileObject

  Correct Answer: C

• Question 185:

  What information can be used to reliably determine the type of an uploaded file?

  A. MIME type

  B. File name extension

  C. Contents of the file

  Correct Answer: C

• Question 186:

  SimpleXML provides the ability to iterate over items in an XML document, as well as access items within it as if they were object properties. When creating your own classes to access data, implementing which of the following would NOT achieve this goal?

  A. __toString

  B. Iterator

  C. __get/__set

  D. ArrayAccess

  Correct Answer: A

• Question 187:

  Consider the following code. What change must be made to the class for the code to work as written?

  class Magic {

  protected $v = array("a" => 1, "b" => 2, "c" => 3);

  public function __get($v) {

  return $this->v[$v];

  }

  }

  $m = new Magic();

  $m->d[] = 4;

  echo $m->d[0];

  A. Nothing, this code works just fine.

  B. Add __set method doing $this->v[$var] = $val

  C. Rewrite __get as: public function __get(and$v)

  D. Rewrite __get as: public function and__get($v)

  E. Make __get method static

  Correct Answer: D

• Question 188:

  How should class MyObject be defined for the following code to work properly? Assume $array is an array and MyObject is a user-defined class.

  $obj = new MyObject(); array_walk($array, $obj);

  A. MyObject should extend class Closure

  B. MyObject should implement interface Callable

  C. MyObject should implement method __call

  D. MyObject should implement method __invoke

  Correct Answer: D

• Question 189:

  Which of the following tasks can be achieved by using magic methods? (Choose 3)

  A. Initializing or uninitializing object data

  B. Creating a new stream wrapper

  C. Creating an iterable object

  D. Processing access to undefined methods or properties

  E. Overloading operators like +, *, etc.

  F. Converting objects to string representation

  Correct Answer: ADF

• Question 190:

  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

  Correct Answer: B