Zend Zend Certifications 200-550 Questions & Answers

• Question 101:

  What is the output of the following code?

  try {

  class MyException extends Exception {};

  try {

  throw new MyException;

  }

  catch (Exception $e) {

  echo "1:";

  throw $e;

  }

  catch (MyException $e) {

  echo "2:";

  throw $e;

  }

  }

  catch (Exception $e) {

  echo get_class($e);

  }

  A. A parser error, try cannot be followed by multiple catch

  B. 1:

  C. 2:

  D. 1:Exception

  E. 1:MyException

  F. 2:MyException

  G. MyException

  Correct Answer: E

• Question 102:

  Which of the following statements is NOT correct?

  A. Only methods can have type hints

  B. Typehints can be optional

  C. Typehints can be references

  Correct Answer: A

• Question 103:

  Which of the following statements is correct?

  A. Interfaces can extend only one interface

  B. Interfaces can extend more than one interface

  C. Interfaces can inherit a method from different interfaces

  D. Interfaces can redeclare inherited methods

  Correct Answer: B

• Question 104:

  Which of the following statements about exceptions is correct? (Choose 2)

  A. you can only throw classes derived from Exception

  B. a try block can have multiple catch blocks

  C. a try block must not be followed by a catch block

  D. try blocks cannot contain nested try blocks

  Correct Answer: AB

• Question 105:

  What is the result of the following code?

  define('PI', 3.14); class T { const PI = PI; } class Math { const PI = T::PI; } echo Math::PI;

  A. Parse error

  B. 3.14

  C. PI

  D. T::PI

  Correct Answer: B

• Question 106:

  Given the following code, what is correct?

  function f(stdClass and$x = NULL) { $x = 42; }

  $z = new stdClass; f($z); var_dump($z);

  A. Error: Typehints cannot be NULL

  B. Error: Typehints cannot be references

  C. Result is NULL

  D. Result is object of type stdClass

  E. Result is 42

  Correct Answer: E

• Question 107:

  Which of the following statements is NOT true?

  A. Class constants are public

  B. Class constants are being inherited

  C. Class constants can omit initialization (default to NULL)

  D. Class constants can be initialized by const

  Correct Answer: C

• Question 108:

  What is the result of the following code?

  class T { const A = 42 + 1; } echo T::A;

  A. 42

  B. 43

  C. Parse error

  Correct Answer: C

• Question 109:

  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()

  Correct Answer: BE

• Question 110:

  Which of these statements about PDO is NOT true?

  A. PDO has built-in support for Large Objects (LOBs).

  B. Placeholders within PDO prepared statements need to be named.

  C. When something goes wrong, PDO can throw an instance of its own exception class.

  D. PDO does not emulate missing database features.

  Correct Answer: B