File Properties Quiz

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File Properties Quiz

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Test what you learned about Properties in the October issue of Java Technology Fundamentals.

If you add an Integer to a Properties object via the put method of Hashtable as both the key and value [props.put(anInteger, anInteger)], what happens when you try to store the Properties set to a FileOutputStream?

A.	The code won't compile
B.	The `toString` method of `Integer` is called to write both the key and value as a `String`.
C.	A `ClassCastException` is thrown because the key is not a `String`
D.	A `ClassCastException` is thrown because the value is not a `String`

Which interface does Hashtable not implement?

A. Cloneable

B. Comparable

C. Map

D. Serializable

Which of the following would sort all the elements in a Properties set, including the defaults?

A.	Create a new `TreeMap`, passing in the source `Properties` object to its constructor.
B.	Create a new `TreeMap` and to the map each key reported by `propertyNames` and its associated value.
C.	Call the `toArray` method of `Properties` and then call `Arrays.sort` on the result.
D.	Call the `sort` method of `Collections` to sort the whole `Map` (`Properties` object).

Of which of the following is Properties not a descendent class?

A. Object

B. Dictionary

C. HashMap

D. Hashtable

What options are available for working with property files that require character encoding in other than the default character set?

A.	Pass the encoding name to the `load` method of `Properties`.
B.	Pass the encoding name to the `InputStreamReader` constructor and then pass that Reader on to the `load` method of `Properties`.
C.	Pass the encoding name to the constructor call of the `Properties` object.
D.	Use the `native2ascii` tool to convert property files to other character encoding.


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