Download JNTUA MCA 2019 May Reg-Supply 5th Sem 9F00505c Design Patterns Question Paper

Download JNTU Anantapur (JNTU Anantapur) Master of Computer Applications (MCA) 2019 May Reg-Supply 5th Sem 9F00505c Design Patterns Previous Question Paper

Code: 9F00505c

MCA V Semester Supplementary Examinations May 2019
DESIGN PATTERNS
(For 2009, 2010, 2011, 2012 (LC), 2013, 2014, 2015 & 2016 admitted batches only)

Time: 3 hours Max. Marks: 60

Answer any FIVE questions
All questions carry equal marks
*****
1 (a) Draw the interaction diagram for the ?SpellCheck? object. Using Smalltalk MVC code.
(b) Explain the step-by-step approach for effectively applying an appropriate design pattern while
solving object-oriented applications.

2 (a) Define a ?Command? class with single abstract method called ?Compute?. Create subclasses
called ?Add?, ?Subtract?. Using aggregation show the relationship between these commands in a
?Calculator?.
(b) Explain about various ?Look-and-Feel? methods in user interface design.

3 (a) Discuss about the participants and collaborations of builder pattern.
(b) Which are the situations that support an object that can be used as a prototype?

4 (a) When do we need bridge pattern? List out consequences of its implementation.
(b) Explain the design steps involved in using adapter pattern.

5 (a) Make a brief note on storage savings and issues related to flyweight pattern.
(b) Design a fa?ade class called ?Programming Environment? that defines operations such as
inspectObject and inspectClass for accessing the browsers.

6 (a) Suppose the following grammar defines the regular expressions:
Expression ::= literal | sequence | repetition |
?(? expression?)?
Sequence ::= expression ?&? expression
Repetition ::= expression ?*?
Literal ::= ?a? | ?b? |?c?| ?{ ?a? | ?b? | ?c?| ?}*
Using interpreter pattern implement the classes required for the above grammar rules.
(b) Explain the iterator pattern for solving set of repeated tasks.

7 (a) Design a panel that generates user responses using observer pattern.
(b) List out the advantages, disadvantages and features of memento pattern.

8 (a) Using visitor pattern, schematically explain the user interactions in a site.
(b) Apply the principles of state transitions for a online registration application.

*****

FirstRanker.com - FirstRanker's Choice