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  Tutorial: Java Interview Questions - Page 11

Question: What class allows you to read objects directly from a stream? Answer: The ObjectInputStream class supports the reading of objects from input streams.

Tutorial Details:

Question: How are this() and super() used with constructors?
Answer: this() is used to invoke a constructor of the same class. super() is used to invoke a superclass constructor.

Question: How is it possible for two String objects with identical values not to be equal under the == operator?
Answer: The == operator compares two objects to determine if they are the same object in memory. It is possible for two String objects to have the same value, but located indifferent areas of memory.

Question: What an I/O filter?
Answer: An I/O filter is an object that reads from one stream and writes to another, usually altering the data in some way as it is passed from one stream to another.


 

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