1. Scenario: You need to ensure that a class only has one instance throughout the application lifecycle, such as a configuration manager. How would you implement a Singleton pattern in Java to manage a global configuration setting?
2. Scenario: You have a class that represents a logging service, and you want to ensure there is only one instance managing all log outputs. What is a thread-safe approach to implement the Singleton pattern for a logging service in Java?
3. Scenario: Your application requires a single instance of a database connection pool. How would you use the Singleton pattern to manage a database connection pool efficiently?
4. Scenario: A caching system in your application needs to be a single instance to ensure consistency across all operations. Describe how you would apply the Singleton pattern to design a caching system.
5. Scenario: You need to control access to a shared resource across multiple threads. What techniques can be used to implement a thread-safe Singleton pattern in Java?
6. Scenario: You need a single instance of a network connection manager that handles multiple connections. How would you implement the Singleton pattern to ensure only one network connection manager instance is created?
7. Scenario: A settings manager in your application needs to be accessed globally to provide consistent configurations. Describe how you would use the Singleton pattern to implement a settings manager that can be accessed globally.
8. Scenario: You need to ensure that a class used for resource pooling (e.g., thread pool) only has a single instance. What is a common approach to implementing the Singleton pattern for a resource pool?
9. Scenario: You want to control access to a shared cache that should be initialized only once. How can you use the Singleton pattern to implement a cache that is initialized only once?
10. Scenario: Your application has a global logging service that must be used throughout the application. How would you ensure that there is only one instance of the logging service using the Singleton pattern?
11. Scenario: Your application has a single point of access for managing API keys. How would you use the Singleton pattern to manage API keys across your application?
12. Scenario: You need a single instance of a system configuration manager that ensures consistent application settings. How can you implement a thread-safe Singleton pattern to manage system configurations?
13. Scenario: Your logging framework requires a single instance to handle log file writing across multiple threads. How would you use the Singleton pattern to ensure only one instance of the logging framework is used?
14. Scenario: You need a Singleton instance for managing user sessions in a web application. How would you implement the Singleton pattern to manage user sessions effectively?
15. Scenario: Your application requires a Singleton instance to coordinate access to a shared resource, such as a printer. Describe how you would use the Singleton pattern to control access to a shared printer resource.
