Java SE 7 Programmer II — Question 4

Which type of application would benefit from using the Singleton pattern?

Answer options

• A. An application that interacts with external systems in serial fashion.
• B. An application that interacts with external systems in parallel fashion.
• C. A clustered application that can support 200 concurrent users.
• D. An application that requires remote monitoring capabilities

Correct answer: A, D

Explanation

The Singleton pattern is ideal for applications that need a single instance to manage resources effectively, such as those interacting with external systems in a serial fashion, ensuring that operations are carried out one after another without conflict. Option D could also benefit from the Singleton pattern as it may require a centralized instance to handle remote monitoring, whereas options B and C do not necessitate such a pattern due to their parallel processing and scalability requirements.