Given: ``java public class App { public static void main(String[] args) { Boolean[] bool = new Boolean[2]; bool[0] = new Boolean(Boolean.parseBoolean("true")); bool[1] = new Boolean(null)…

Question

public class App {
 public static void main(String[] args) {
 Boolean[] bool = new Boolean[2];
 bool[0] = new Boolean(Boolean.parseBoolean("true"));
 bool[1] = new Boolean(null);
 System.out.println(bool[0] + " " + bool[1]);
 }
}

Options

• ATrue false
• BTrue null
• CCompilation fails
• DA NullPointerException is thrown at runtime

• A
  74% (26)
• B
  3% (1)
• C
  9% (3)
• D
  14% (5)

Explanation

Boolean.parseBoolean("true") returns the primitive true, so bool[0] wraps to true. Crucially, new Boolean(null) calls the Boolean(String) constructor, which internally treats any non-"true" string-including null-as false, so bool[1] wraps to false, printing true false (option A's capital "T" is just answer-choice formatting).

B is wrong because bool[1] holds a Boolean object wrapping false, not a null reference-the array was declared Boolean[] but the slot was assigned a real object.

C is wrong because the code compiles; new Boolean(String) is deprecated in modern Java but not a compile error.

D is wrong because no NPE occurs-new Boolean(null) is perfectly valid and simply evaluates to false rather than throwing.

Memory tip: Think of Boolean.parseBoolean() as "anything that isn't the word true (case-insensitive) becomes false"-nulls, empty strings, and garbage all silently return false, never an exception.

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