1: public class _C { 2: private static int $; 3: public static void main(String[] main) { 4: String a_b; 5: System.out.print($); 6: System.out.print(a_b); 7: } }
❌ A. Compiler error on line 1. ❌ B. Compiler error on line 2. ❌ C. Compiler error on line 4. ❌ D. Compiler error on line 5. ✅ E. Compiler error on line 6. ❌ F. 0null ❌ G. nullnull
Explanation: Option E is correct because local variables require assignment before referencing them. Option D is incorrect because class and instance variables have default values and allow referencing. a_b defaults to a null value. Options A, B, and C are incorrect because identifiers may begin with a letter, underscore, or dollar sign. Options F and G are incorrect because the code does not compile. If a_b was an instance variable, the code would compile and output 0null
1: public class _C { 2: private static int $; 3: public static void main(String[] main) { 4: String a_b; 5: System.out.print($); 6: System.out.print(a_b); 7: } }
❌ A. Compiler error on line 1. ❌ B. Compiler error on line 2. ❌ C. Compiler error on line 4. ❌ D. Compiler error on line 5. ✅ E. Compiler error on line 6. ❌ F. 0null ❌ G. nullnull
Explanation: Option E is correct because local variables require assignment before referencing them. Option D is incorrect because class and instance variables have default values and allow referencing. a_b defaults to a null value. Options A, B, and C are incorrect because identifiers may begin with a letter, underscore, or dollar sign. Options F and G are incorrect because the code does not compile. If a_b was an instance variable, the code would compile and output 0null
BY Explanations “Top Java Quiz Questions”
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