### Question:
ServerBlob extends UnicastExportable implements RemoteBlob { public ServerBlob(Blob blob, Exporter exporter) throws RemoteException { super(exporter); this.blob = blob; } ServerBlob(Blob blob, Exporter exporter); @Override URI getId(); @Override URI getCanonicalId(); @Override boolean exists(); @Override long getSize(); @Override void delete(); @Override RemoteBlob moveTo(URI other, Map<String, String> hints); @Override RemoteInputStream openInputStream(); @Override RemoteOutputStream openOutputStream(long estimatedSize, boolean overwrite);  }### Answer:
@Test public void testServerBlob() { assertTrue(sb.getExported() instanceof RemoteBlob); }