Why do we need singleton pattern?


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More Design Patterns Interview Questions

Explain the singleton, facade, or handle class design pattern?

2 Answers   ABC,


What is mvp design pattern?

0 Answers  


What is architecture and what is design?

0 Answers  


What are creational design patterns?

0 Answers  


Why is it important to use systems analysis and design methodologies when building a system? Why not just build the system in whatever way appears to be “quick and easy”? What value is provided by using an “engineering” approach?

1 Answers   DBU, KSV College, Sampson, University of Ibadan,






Shall we use abstract classes or interfaces in policy / strategy design pattern?

0 Answers  


Contact a small, medium, and a large contract program within your organization. Interview the Technical Director or Project Engineer to identify the following information: a. Request the individual to graphically depict their development strategy? b. What factors drove them to choose the implementation strategy? c. What were some of the lessons learned from developing and implementing the strategy that would influence their approach next time? d. How was the V & V strategy implemented?

0 Answers  


Why have we declared the instance reference volatile?

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What are the advantages of asynchronous architectures?

1 Answers   Microsoft,


Quartus II software version 6.0 is available for which operating systems (OS)?

0 Answers  


In what cases are synchronous architectures more appropriate than asynchronous architectures?

1 Answers   Wipro,


When should design patterns be used?

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