26. What is the output of below snippet?
    

    try (InputStream is = ...) 
    {
        // do stuff with is...
    } 
    catch (IOException e) 
    {
        // handle exception
    }
    

1. 1. Runs successfully

   
   
   

   2. Compilation Error

   
   
   

   3. IOException

   
   
   

   4. Runtime Error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Using java 7 and above, AutoCloseable objects can be opened in the try-block (within the ()) and will be automatically closed instead of using the finally block.

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27. What is the difference between AutoCloseable and Closeable?

1. 1. Closeable throws Exception; AutoCloseable throws IOException

   
   
   

   2. Closeable is a concept; AutoCloseable is an implementation

   
   
   

   3. Closeable throws IOException; AutoCloseable throws Exception

   
   
   

   4. Closeable is an interface and AutoCloseable is a concrete class

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Closeable extends AutoCloseable and both are interfaces. Closeable throws IOException and AutoCloseable throws Exception.

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28. What is the use of Flushable interface?

1. 1. Flushes this stream and starts reading again

   
   
   

   2. Flushes this stream by writing any buffered output to the underlying stream

   
   
   

   3. Flushes this stream and throws FlushException

   
   
   

   4. Flushes this connection and closes it

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   Flushable interface provides flush() method which Flushes this stream by writing any buffered output to the underlying stream.

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29. Which version of java added Flushable interface?

1. 1. java SE 6

   
   
   

   2. java SE 8

   
   
   

   3. java SE 5

   
   
   

   4. java SE 7

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Flushable and Closeable interface are added in java SE 5.

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30. Does close() implicitly flush() the stream.

1. 1. False

   
   
   

   2. True

   
   
   

   3. NA

   
   
   

   4. NA

   
   
   

   5. NA

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   close() closes the stream but it flushes it first.

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