public class WaterBottle { private String brand; private boolean empty; public static void main(String[] args) { WaterBottle wb = new WaterBottle(); System.out.print("Empty = " + wb.empty); System.out.print(", Brand = " + wb.brand); } }
❌ A. Line 6 generates a compiler error. ❌ B. Line 7 generates a compiler error. ❌ C. There is no output. ✅ D. Empty = false, Brand = null ❌ E. Empty = false, Brand = ❌ F. Empty = null, Brand = null
Explanation: Boolean fields initialize to false and references initialize to null, so empty is false and brand is null. Brand = null is output.
public class WaterBottle { private String brand; private boolean empty; public static void main(String[] args) { WaterBottle wb = new WaterBottle(); System.out.print("Empty = " + wb.empty); System.out.print(", Brand = " + wb.brand); } }
❌ A. Line 6 generates a compiler error. ❌ B. Line 7 generates a compiler error. ❌ C. There is no output. ✅ D. Empty = false, Brand = null ❌ E. Empty = false, Brand = ❌ F. Empty = null, Brand = null
Explanation: Boolean fields initialize to false and references initialize to null, so empty is false and brand is null. Brand = null is output.
BY Explanations “Top Java Quiz Questions”
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Heading into today, shares of the digital pinboard and shopping tool company had lost 17.41% over the past month, lagging the Computer and Technology sector's loss of 5.38% and the S&P 500's gain of 0.71% in that time.
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