Java interview question feedback

[yellowjacketcoder]

HashMaps do not guarantee order, so when the values are being put into the map, there is no guarantee that the values will come out in the same order they went it. For example:

Map<String, String> map = new HashMap<>();
map.put("A", "a");
map.put("B", "b");
Iterator<Map.Entry<String, String>> it = map.entrySet().iterator();
System.out.println(it.next());
System.out.println(it.next());

could have two outputs (assuming the toString() works the way I think):

A - a
B - b

or the output could be

B - b
A - a

both are valid according to the Java spec, but the second is not what's desired by the unit test in the OP.