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A servlet wishes to indicate that it is unable to initialize at the present time, but that the initialization might succeed at some future time. Which is true?

This cannot be expressed. A servlet either initializes correctly or fails.

This expression is not necessary. If a servlet fails to initialize, the container will try again later each time a request is received that attempts to invoke that servlet.

The servlet should delay until it is ready to complete initialization successfully.

The servlet should throw an UnavailableException

The servlet should throw a servletException

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