200-550 Online Practice Questions and Answers

Which of the following will set a 10 seconds read timeout for a stream?

A. ini_set("default_socket_timeout", 10);

B. stream_read_timeout($stream, 10);

C. Specify the timeout as the 5th parameter to the fsockopen() function used to open a stream

D. stream_set_timeout($stream, 10);

E. None of the above

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

A. PHPIterator

B. RecursiveTreeIterator

C. RecursiveDirectoryIterator

D. SplTempFileObject

Given a JSON-encoded string, which code sample correctly indicates how to decode the string to native PHP values?

A. $json = new Json($jsonValue); $value = $json->decode();

B. $value = Json::decode($jsonValue);

C. $value = json_decode($jsonValue);

D. $value = Json::fromJson($jsonValue);

Given the following code, how can we use both traits A and B in the same class? (select all that apply)

trait A {

public function hello() {

return "hello";

}

public function world() {

return "world";

}

}

trait B {

public function hello() {

return "Hello";

}

public function person($name) {

return ":$name";

}

}

A. Rename the A::hello() method to a different name using A::hello as helloA;

B. Use B::hello() instead of A 's version using B::hello insteadof A

C. Use B::hello() instead of A 's version using use B::hello

D. Rename the A::hello() method to a different name using A::hello renameto helloA;

E. None of the above (both can be used directly)

Is the following code vulnerable to SQL Injection ($mysqli is an instance of the MySQLi class)?

$age = $mysqli->real_escape_string($_GET['age']);

$name = $mysqli->real_escape_string($_GET['name']);

$query = "SELECT * FROM `table` WHERE name LIKE '$name' AND age = $age"; $results = $mysqli>query($query);

A. No, the code is fully protected from SQL Injection.

B. Yes, because the $name variable is improperly escaped.

C. Yes, because the $name variable and the $age variable is improperly escaped.

D. Yes, because the $age variable is improperly escaped.

E. Yes, because you cannot prevent SQL Injection when using MySQLi

Which of the following items in the $_SERVER superglobal are important for authenticating the client when using HTTP Basic authentication? (Choose 2)

A. PHP_AUTH_TYPE

B. PHP_AUTH_PASSWORD

C. PHP_AUTH_DIGEST

D. PHP_AUTH_PW

E. PHP_AUTH_USER

Which of the following superglobals does not necessarily contain data from the client?

A. $_POST

B. $_SESSION

C. $_GET

D. $_SERVER

Which one of the following XML declarations is NOT valid?

A.

B.

C.

D.

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()

What is the return value of the following code?

strpos("me myself and I", "m", 2)

A. 2

B. 3

C. 4

D. 0

E. 1