When you create a Streams instance, you must specify a name for the new instance that satisfies which requirement?
A. The name can not start with an alphabetic character.
B. The name must contain a dash (-), an underscore (_), or a period (.).
C. The name must be unique among the instances defined by the instance owner.
D. The name must be unique among all instances defined by all instance owners.
正解:C
質問 2:
What is a Streams toolkit?
A. A package of compiled and standalone Streams applications.
B. A package of SPL types, functions, and operators.
C. A description of valid port configurations, parameters, and attribute values for a primitive operator.
D. A set of plug-ins, compilers, and editors for developing SPL applications.
正解:B
質問 3:
What are the permitted trigger polices for a sliding window?
A. time, date, and punct
B. count, time, and delta
C. count, time, and date
D. count, time, date, and punct
正解:B
質問 4:
When a tumbling window is full, how will it behave?
A. It will execute the operator behavior and flush all stored tuples before starting over from scratch.
B. It will execute the operator behavior and expel the oldest tuples before processing the next tuple.
C. It will expel the oldest tuples, execute the operator behavior, and flush all processed tuples before starting from scratch.
D. It will expel triggered tuples, execute the operator behavior, and flush unprocessed tuples before starting from the end.
正解:A
質問 5:
Which statement is TRUE?
A. A stream can contain at most a single tuple.
B. A stream can contain many tuples of one type.
C. A stream can contain many tuples of many different types.
D. A stream can contain a tuple of an undefined type.
正解:B