Download JNTUH MCA 5th Sem R13 2019 April-May 815BF Design Patterns Question Paper

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 5th Sem (Fifth Semester) Regulation-R13 2019 April-May 815BF Design Patterns Previous Question Paper

R13

Code No: 815BF

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA V Semester Examinations, April/May - 2019

DESIGN PATTERNS

Time: 3 Hours















Max. Marks: 60

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
8 marks and may have a, b, c as sub questions.



PART - A



















5 ? 4 Marks = 20

1.a) How to select a design pattern? Explain.











[4]

b) What are design problems in Lexi's design? Explain.







[4]

c) What are known uses of Proxy and Decorator?









[4]

d) Describe implementation of Cursor.











[4]

e) Write brief discussion on behavioral patterns.









[4]



PART - B



















5 ? 8 Marks = 40



2.a)

Explain the following phrases: i) Programming to an interface not an implementation
ii) Favor object composition over class inheritance.

b)

How design patterns solve design problems?









[4+4]

OR

3.a)

Explain the catalog of design patterns.

b)

Discuss about design patterns in Smalltalk MVC with example.



[4+4]



4.a)

Describe structures of Builder and Prototype.

b)

Discuss about user operations in Lexi's design.









[4+4]

OR

5.a)

Explain motivations of Abstract Factory and Factory Method.

b)

Discuss about supporting multiple window systems.







[4+4]


6.a)

Describe motivations of Proxy and Decorator.

b)

Write and explain the sample code of Flyweight.







[4+4]

OR

7.a)

What are advantages of Bridge pattern? Explain about its implementation.

b)

Briefly explain about Facade pattern.











[4+4]


8.a)

Discuss about implementation of Iterator.

b)

Explain in detail about Command pattern.









[4+4]

OR

9.a)

Describe structures of Memento and Mediator.

b)

Write and explain about sample code of Interpreter.







[4+4]


10.a) Explain about motivation and implementation of Strategy.
b) Discuss in detail about Template Method.









[4+4]

OR

11.

Write history of design patterns. What to expect from design patterns? Explain. [8]



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