OCP Oracle Certified Professional Java SE 17 Developer Practice Tests

Chapter 5Working with Arrays and Collections

THE OCP EXAM TOPICS COVERED IN THIS PRACTICE TEST INCLUDE THE FOLLOWING:

• Working with Arrays and Collections
  • Create Java arrays, List, Set, Map, and Deque collections, and add, remove, update, retrieve and sort their elements

1. What is the output of the following?

   List<String> museums = new ArrayList<>(1);
   museums.add("Natural History");
   museums.add("Science");
   museums.add("Art");
   museums.remove(2);
   System.out.println(museums);
   

   1. [Natural History, Science]
   2. [Natural History, Art, Science]
   3. The code does not compile.
   4. The code compiles but throws an exception at runtime.
2. How many of the following are legal declarations?

   []String lions = new String[];
   String[] tigers = new String[1] {"tiger"}; ...