Exam 1z0-819 topic 1 question 132 discussion

answer: BDG A. wrong there is no Arrays.of B. correct UnmodifiableList C. not correct C. is not correct List.of disallow null elements IN general unlike sets, lists typically allow duplicate elements. For example ArrayList D. correct static <K,​V> Map<K,​V> of​(K k1, V v1) from Java 11 E. wrong static <E> List<E> of​(E e1, E e2) F. wrong A collection that contains no duplicate elements G. correct static <E> Set<E> of​(E e1, E e2)

BDG is correct

Tested: BDG.

Not tested but a bit obvious

BDG. C throws a NullPointerException and F throws a IllegalArgumentException

B. var loc = List.of("UK", "US"); D. var loc = Map.of("UK", 1, "US", 2); G. var loc = Set.of("UK", "US"); List.of, Map.of, and Set.of are all valid methods for creating unmodifiable collections of their respective types. The other options are invalid because: A. Arrays.of is not a valid method. C. List.of does not allow null elements. E. ArrayList.of is not a valid method. F. Set.of does not allow duplicate elements.