A developer chooses&e

题目

A developer chooses to avoid using SingleThreadModel but wants to ensure that data is updated in athread-safe manner. Which two can support this design goal?()

  • A、Store the data in a local variable.
  • B、Store the data in an instance variable.
  • C、Store the data in the HttpSession object.
  • D、Store the data in the ServletContext object.
  • E、Store the data in the ServletRequest object.
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