Java OCA OCP Practice Question 696

Question

What is the output of the following? 

20:  List<Character> chars = new ArrayList<>(); 
21:  chars.add('a'); 
22:  chars.add('b'); 
23:  chars.set(1, 'c'); 
24:  chars.remove(0); 
25:  System.out.print(chars.size() + " " + chars.contains('b'));
  • A. 1 false
  • B. 1 true
  • C. 2 false
  • D. 2 true


A.

Note

Lines 20-22 create an ArrayList with two elements.

Line 23 replaces the second one with a new value.

Now chars is [a, c].

Then line 24 removes the first element, making it just [c].

Option A is correct because there is only one element, but it is not the value b.




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