NPTEL Software Engineering Quiz B

How is inheritance useful?

• a. It prevents inherited properties from being lost

• b. It minimizes the amount of code which has to be written

• c. It creates elegant tree structures in the class model

• d. It divides objects up into useful classes

Consider the sentence: A book has one or more pages. Which of the following best characterizes the relationship between the Book class and the Page class?

• a. Inheritance

• b. Specialization

• c. Association

• d. Composition

Which one of the following characteristics of a class implies that the same message can be interpreted by it differently?

• a. Encapsulation

• b. Polymorphism

• c. Information Hiding

• d. Inheritance

Which one of the following is true of encapsulation?

• a. Encapsulation helps in reuse since it is not necessary for the developers to know how an off-the-shelf software component works internally.

• b. Encapsulation means that software components can work more efficiently.

• c. Encapsulation means that there is no need for software developers to document their work.

• d. Encapsulation hinders reuse.

Which one of the following best characterizes a sequence diagram?

• a. A call graph illustrating all possible sequences of calls between class method members

• b. A time-line illustrating a typical sequence of calls between object methods

• c. A time-line illustrating the changes in inheritance and instantiation relationships between classes and objects over time

• d. A tree illustrating inheritance relationship between classes

Which of the following UML diagrams should you use when allocating use-case behavior to classes?

• a. sequence and communication diagrams

• b. use-case and activity diagrams

• c. sequence and activity diagrams

• d. class and composite structure diagrams

Consider the following sentence: “A square is a polygon”. From an analysis of the sentence, identify the relations between the two classes Square and Polygon that can be inferred from the sentence.

• a. Inheritance

• b. Association

• c. Aggregation

• d. Composition

Consider the following sentence: “100 paisa are one rupee”. From an analysis of the sentence, identify the relation between the two classes Paisa and Rupee that can be inferred from the sentence.

• a. Inheritance

• b. Association

• c. Aggregation

• d. Composition

Consider the following sentence: “Students live in hostels”. From an analysis of the sentence, identify the relation between the two classes Student and Hostel that can be inferred from the sentence.

• a. Inheritance

• b. Association

• c. Aggregation

• d. Composition

A collaboration diagram depicts which one of the following types of information?

• a. The decision structure among the classes

• b. The looping structure

• c. The attribute values of the objects

• d. Structural information such as class association