| 8.34.Questions |
| 8.34.1. | A Hashtable requires String objects as keys(True/False). |
| 8.34.2. | Answer: hash table key |
| 8.34.3. | A Hashtable maintains object references in the order they were added(True/False). |
| 8.34.4. | Answer: hash table value reference |
| 8.34.5. | Both Vector and Hashtable use synchronized methods to avoid concurrent problems(True/False). |
| 8.34.6. | Answer: synchronization Vector and Hashtable |
| 8.34.7. | Which of the following are interfaces? [Check all correct answers] |
| 8.34.8. | Answer: collection interface and class |
| 8.34.9. | Which class is most similar to the Vector class? |
| 8.34.10. | Answer: Vector like collections |
| 8.34.11. | Which interface does Hashtable implement? |
| 8.34.12. | Answer: interface for Hashtable |
| 8.34.13. | Which of the following layout managers can be used to display nine Button objects at one time? |
| 8.34.14. | Answer: layout |
| 8.34.15. | Which of the following are valid alignment parameters for a FlowLayout? |
| 8.34.16. | Answer: flow layout |
| 8.34.17. | Which of the following layout managers does not alter the height of a component? |
| 8.34.18. | Answer: layout and component height |
| 8.34.19. | For JPanel(new GridLayout(4,4,5,8)), the horizontal space between the buttons will be five pixels(True/False). |
| 8.34.20. | Answer: GridLayout |
| 8.34.21. | For GridLayout, the order in which the Button objects are added controls their position, filling a row first, from left to right (True/False). |
| 8.34.22. | Answer: GridLayout(3) |
| 8.34.23. | Which variable in the GridBagConstraints class can use the constant named CENTER? |
| 8.34.24. | Answer: GridBagConstraints |
| 8.34.25. | Which layout manager ensure that at least a portion of each button added is displayed even when the Panel has been resized to a small size? |
| 8.34.26. | Answer: layout manager |
| 8.34.27. | Which constant names are valid positioning options in the GridBagConstraints class? |
| 8.34.28. | Answer: using GridBagConstraints |
| 8.34.29. | Which of the following classes produce immutable objects? |
| 8.34.30. | Answer: immutable objects |
| 8.34.31. | What is the result(autoboxing and parameter passing)? |
| 8.34.32. | Answer: autoboxing and parameter passing |
| 8.34.33. | What happens when you compile and run code containing the following lines? |
| 8.34.34. | Answer: autoboxing and calculation |
| 8.34.35. | What is the output(substring and file extension name)? |
| 8.34.36. | Answer: substring and file extension name |
| 8.34.37. | What is the result(String reference)? |
| 8.34.38. | Answer: String reference |