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When tracking upload progress with sessions, the values of 2 INI settings are needed to determine the key in $_SESSION of the upload progress data. What are the INI settings? (Choose 2)

A. session.upload_progress.file

B. session.upload_progress.key

C. session.upload_progress.prefix

D. session.upload_progress.freq

E. session.upload_progress.name

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

Which of the following filtering techniques prevents all cross-site scripting (XSS) vulnerabilities?

A. Strip all occurrences of the string