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NEW QUESTION: 1
A computer user, Joe, was surfing for information on a news site when he reported a screen flicker and then a pop-up appeared on his screen stating the computer was infected with a virus. Joe noticed the title of the pop-up was not from his installed antivirus. Which of the following BEST describes this infection?
A. Worm
B. Social engineering
C. Malware
D. Spyware
Answer: C

NEW QUESTION: 2
Scenario:

A. Option D
B. Option A
C. Option C
D. Option B
Answer: A

NEW QUESTION: 3
Which two statements are true?
A. To be implemented properly, factories rely on the private keyword.
B. Implementing a DAO often includes the use of factory.
C. Factories are an example of the OO principle "program to an interface."
D. One step in implementing a factory is to add references from all the classes that the factory will merge.
E. Using factory prevents your replication from being tightly coupled with a specific Singleton
Answer: B,C
Explanation:
A: The DAO design pattern completely hides the data access implementation from its clients. The interfaces given to client does not changes when the underlying data source mechanism changes. this is the capability which allows the DAO to adopt different access scheme without affecting to business logic or its clients. generally it acts as a adapter between its components and database. The DAO design pattern consists of some factory classes, DAO interfaces and some DAO classes to implement those interfaces.
C: The essence of the Factory method Pattern is to "Define an interface for creating an object, but let the classes which implement the interface decide which class to instantiate. The Factory method lets a class defer instantiation to subclasses."
Note:The factory method pattern is an object-oriented design pattern to implement the concept of factories. Like other creational patterns, it deals with the problem of creating objects (products) without specifying the exact class of object that will be created. The creation of an object often requires complex processes not appropriate to include within a composing object. The object's creation may lead to a significant duplication of code, may require information not accessible to the composing object, may not provide a sufficient level of abstraction, or may otherwise not be part of the composing object's concerns. The factory method design pattern handles these problems by defining a separate method for creating the objects, whichsubclasses can then override to specify the derived type of product that will be created. Some of the processes required in the creation of an object include determining which object to create, managing the lifetime of the object, and managing specialized build-up and tear-down concerns of the object.

NEW QUESTION: 4
What kind of relationship is an extension in UML 2.0?
A. generalization
B. reification
C. dependency
D. association
Answer: D