Advanced Java Online Test - 2

1. What is the use of Flushable interface?

Flushes this stream and starts reading again

Flushes this stream and throws FlushException

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

Flushes this connection and closes it

2. Which version of java added Flushable interface?

java SE 8

java SE 6

java SE 7

java SE 5

3. What is the difference between AutoCloseable and Closeable?

Closeable throws Exception; AutoCloseable throws IOException

Closeable is an interface and AutoCloseable is a concrete class

Closeable is a concept; AutoCloseable is an implementation

Closeable throws IOException; AutoCloseable throws Exception

4. Autocloseable was introduced in which Java version?

java SE 7

java SE 4

java SE 8

java SE 6

5. Which of the below is a child interface of Autocloseable?

Cloneable

Auto

Closeable

6. What is the alternative of using finally to close resource?

try block

throw Exception

catch block

autocloseable interface to be implemented

7. What will be the output of the following Java code snippet?

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

Runtime Error

IOException

Compilation Error

Runs successfully

8. It is a good practise to not throw which exception in close() method of autocloseable?

CloseException

CustomException

IOException

InterruptedException

9. AutoCloseable and Flushable are part of which package?

Autocloseable and Flushable java.lang

Autocloseable java.io; Flushable java.lang

Autocloseable java.lang; Flushable java.io

Autocloseable and Flushable java.io

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

False

True