Zend Zend Certified 200-550 Questions & Answers

• Question 211:

  What is the output of the following code?

  echo "22" + "0.2", 23 . 1;

  A. 220.2231

  B. 22.2231

  C. 22.2,231

  D. 56.2

  Correct Answer: B

• Question 212:

  What is the output of the following code?

  $first = "second"; $second = "first"; echo $$$first;

  A. "first"

  B. "second"

  C. an empty string

  D. an error

  Correct Answer: B

• Question 213:

  Which of the following code snippets DO NOT write the exact content of the file "source.txt" to "target.txt"? (Choose 2)

  A. file_put_contents("target.txt", fopen("source.txt", "r"));

  B. file_put_contents("target.txt", readfile("source.txt"));

  C. file_put_contents("target.txt", join(file("source.txt"), "\n"));

  D. file_put_contents("target.txt", file_get_contents("source.txt"));

  E. $handle = fopen("target.txt", "w+"); fwrite($handle, file_get_contents("source.txt")); fclose($handle);

  Correct Answer: BC

• Question 214:

  What is the output of the following code?

  echo "1" + 2 * "0x02";

  A. 1

  B. 3

  C. 5

  D. 20

  E. 7

  Correct Answer: C

• Question 215:

  What is the result of the following bitwise operation in PHP?

  1 ^ 2

  A. 1

  B. 3

  C. 2

  D. 4

  E. -1

  Correct Answer: B

• Question 216:

  What super-global should be used to access information about uploaded files via a POST request?

  A. $_SERVER

  B. $_ENV

  C. $_POST

  D. $_FILES

  E. $_GET

  Correct Answer: D

• Question 217:

  What is the difference between "print" and "echo"?

  A. There is no difference.

  B. Print has a return value, echo does not

  C. Echo has a return value, print does not

  D. Print buffers the output, while echo does not

  E. None of the above

  Correct Answer: B

• Question 218:

  Which of the following are valid identifiers? (Choose 3)

  A. function 4You() { }

  B. function _4You() { }

  C. function object() { }

  D. $1 = "Hello";

  E. $_1 = "Hello World";

  Correct Answer: BCE

• Question 219:

  What is "instanceof" an example of?

  A. a boolean

  B. an operator

  C. a function

  D. a language construct

  E. a class magic

  Correct Answer: B

• Question 220:

  Which of the following may be used in conjunction with CASE inside a SWITCH statement?

  A. A scalar

  B. An expression

  C. A boolean

  D. All of the above

  Correct Answer: D