JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
MCA V Semester Examinations, April/May - 2019
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DESIGN PATTERNS
Time: 3 Hours
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Max. Marks: 60
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Note: This question paper contains two parts A and B.
Part A is compulsory which carries 20 marks. Answer all questions in Part A. Part B
consists of 5 Units. Answer any one full question from each unit. Each question carries
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8 marks and may have a, b, c as sub questions.PART - A
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5 ? 4 Marks = 20
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1.a) How to select a design pattern? Explain.
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[4]
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b) What are design problems in Lexi's design? Explain.--- Content provided by FirstRanker.com ---
[4]
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c) What are known uses of Proxy and Decorator?--- Content provided by FirstRanker.com ---
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[4]d) Describe implementation of Cursor.
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[4]
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e) Write brief discussion on behavioral patterns.
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[4]
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PART - B--- Content provided by FirstRanker.com ---
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5 ? 8 Marks = 402.a)
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Explain the following phrases: i) Programming to an interface not an implementation
ii) Favor object composition over class inheritance.
b)
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How design patterns solve design problems?
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[4+4]
OR
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3.a)Explain the catalog of design patterns.
b)
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Discuss about design patterns in Smalltalk MVC with example.
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[4+4]4.a)
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Describe structures of Builder and Prototype.
b)
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Discuss about user operations in Lexi's design.--- Content provided by FirstRanker.com ---
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[4+4]OR
5.a)
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Explain motivations of Abstract Factory and Factory Method.
b)
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Discuss about supporting multiple window systems.--- Content provided by FirstRanker.com ---
[4+4]
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6.a)
Describe motivations of Proxy and Decorator.
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b)Write and explain the sample code of Flyweight.
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[4+4]OR
7.a)
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What are advantages of Bridge pattern? Explain about its implementation.
b)
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Briefly explain about Facade pattern.--- Content provided by FirstRanker.com ---
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[4+4]
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8.a)Discuss about implementation of Iterator.
b)
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Explain in detail about Command pattern.
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[4+4]
OR
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9.a)Describe structures of Memento and Mediator.
b)
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Write and explain about sample code of Interpreter.
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[4+4]
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10.a) Explain about motivation and implementation of Strategy.
b) Discuss in detail about Template Method.
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[4+4]
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OR11.
Write history of design patterns. What to expect from design patterns? Explain. [8]
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