Java interview questions: - 16 most asked important questions on Input and Output (I/O).

Following are the sets of 16 most asked  Java interview questions by the interviewer during the interview.

• What is the difference between the Reader/Writer class hierarchy and the InputStream/OutputStream class hierarchy?
• What is the purpose of the File class?
• What an I/O filter?
• What is the difference between the File and RandomAccessFile classes?
• What is Serialization and deserialization?
• What is the difference between Serializalble and Externalizable interface?
• Which methods of Serializable interface should I implement?
• What is the purpose of the Runtime class?
• What is the purpose of the System class?
• What is the Properties class?
• How many methods in the Externalizable interface?
• What class allows you to read objects directly from a stream?
• What happens to the static fields of a class during serialization?
• How do I connect a Reader to an InputStream?
• How many types of IOStream are present?
• What is the use of non blocking IO?

Also see the following interesting video on Inheritance between beans and Spring: -

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