Which of the following statements is true?

Consider 3 PHP files that are called asynchronously via XmlHttpRequest:

Which of the following statements is true? (Choose two.)
A . The total execution time for all 3 requests will be the maximum of the longest sleep() call
B . The requests may be processed out of order
C . The requests are guaranteed to be executed in order
D . Concurrent requests will be blocked until the session lock is released

View Answer

Answer: A