| 8.30.Questions |
| 8.30.1. | What happens when you try to compile and run code containing the following lines: | | |
| 8.30.2. | Answer: Float + String | | |
| 8.30.3. | Which of the following Collections classes can return object references in the order of addition? | | |
| 8.30.4. | Answer: collection and order | | |
| 8.30.5. | Which of the following interfaces in the java.util package does java.util.Hashtable implement? | | |
| 8.30.6. | Answer: Hashtable and interface | | |
| 8.30.7. | What does Math.random() method return? | | |
| 8.30.8. | Answer: return value from Math.random() | | |
| 8.30.9. | What kind of stream is the System.out object? | | |
| 8.30.10. | Answer: System.out stream | | |
| 8.30.11. | When // XXX is reached, how many objects are eligible for GC? | | |
| 8.30.12. | Answer: garbage collection | | |
| 8.30.13. | What is the result(overloaded and var-args methods)? | | |
| 8.30.14. | Answer: overloaded and var-args methods | | |
| 8.30.15. | What is the result(array dimension)? | | |
| 8.30.16. | Answer: array dimension | | |
| 8.30.17. | What is the result(constructor)? | | |
| 8.30.18. | Answer: constructor | | |
| 8.30.19. | What is the result(final class reference)? | | |
| 8.30.20. | Answer: final class reference | | |
| 8.30.21. | What is the result(hierarchy and static init blocks)? | | |
| 8.30.22. | Answer: hierarchy and static init blocks | | |
| 8.30.23. | What is the output(enum)? | | |
| 8.30.24. | Answer: enum | | |
| 8.30.25. | What is the result(static variable)? | | |
| 8.30.26. | Answer: static variable | | |
| 8.30.27. | What is the result(autobox and widen)? | | |
| 8.30.28. | Answer: autobox and widen | | |
| 8.30.29. | Which are true about the objects created within main(), and eligible for garbage collection when line 14 is reached? | | |
| 8.30.30. | Answer: garbage collection and array objects | | |
| 8.30.31. | When 'do stuff' is reached, how many objects will be eligible for garbage collection? | | |
| 8.30.32. | Answer: ready for garbage collection | | |
| 8.30.33. | What is the result(class instance variables)? | | |
| 8.30.34. | Answer: class instance variables | | |
| 8.30.35. | What is the result(pre-increment operators)? | | |
| 8.30.36. | Answer: pre-increment operators | | |