Given the code fragment: interface SampleClosable { public void close () throws java.io.IOException; } Which three implementations are valid?

The correct answer is A. Option A C. Option C E. Option E. A: Throwing the same exception is fine. C: Using a subclass of java.io.IOException (here java.io.FileNotFoundException) is fine E: Not using a throw clause is fine. Incorrect answers: B: Exception is not a subclass of java.io.IOException and cannot be used here. D: Not extends. S

Working with Inheritance

Question

Given the code fragment:

interface SampleClosable { public void close () throws java.io.IOException; } Which three implementations are valid?

Exhibit

Options

AOption A
BOption B
COption C
DOption D
EOption E

How the community answered

(29 responses)

A
79% (23)
B
7% (2)
D
14% (4)

Explanation

A: Throwing the same exception is fine. C: Using a subclass of java.io.IOException (here java.io.FileNotFoundException) is fine E: Not using a throw clause is fine. Incorrect answers: B: Exception is not a subclass of java.io.IOException and cannot be used here. D: Not extends. SampleCloseable cannot be the superclass of Test, a superclass must be a (An interface extends other interfaces.)

Topics

#interfaces#method overriding#exception handling#IOException

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