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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The STAR Market, as is implied by the name, is heavily geared toward smaller innovative tech companies, in particular those engaged in strategically important fields, such as biopharmaceuticals, 5G technology, semiconductors, and new energy. The STAR Market currently has 340 listed securities. The STAR Market is seen as important for China’s high-tech and emerging industries, providing a space for smaller companies to raise capital in China. This is especially significant for technology companies that may be viewed with suspicion on overseas stock exchanges.
How to Use Bitcoin?
n the U.S. people generally use Bitcoin as an alternative investment, helping diversify a portfolio apart from stocks and bonds. You can also use Bitcoin to make purchases, but the number of vendors that accept the cryptocurrency is still limited. Big companies that accept Bitcoin include Overstock, AT&T and Twitch. You may also find that some small local retailers or certain websites take Bitcoin, but you’ll have to do some digging. That said, PayPal has announced that it will enable cryptocurrency as a funding source for purchases this year, financing purchases by automatically converting crypto holdings to fiat currency for users. “They have 346 million users and they’re connected to 26 million merchants,” says Spencer Montgomery, founder of Uinta Crypto Consulting. “It’s huge.”
