21⟩ In object-oriented approach, objects are a) Identical b) Discrete c) Both Identical And Discrete d) None
b) Discrete
OOAD
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“OOAD Interview Questions and Answers will guide that Object-oriented analysis and design (OOAD) is a software engineering approach that models a system as a group of interacting objects. Each object represents some entity of interest in the system being modeled, and is characterized by its class, its state (data elements), and its behavior. So learn OOAD with the help of this OOAD Interview Questions with Answers guide”
63 OOAD Questions And Answers
22⟩ A ______________ is a physical or replaceable part of a system that conforms to and provides the realization of set of interfaces. a) node b) object c) interface d) component
d) component
23⟩ A use case diagram is used to model __________ of a system. a) structure b) behavior c) organization d) none
b) behavior
24⟩ The architecture of a software-intensive system can be described by ____ views. a) three b) five c) nine d) none
b) five
25⟩ In a class, a private operation is shown by a) + b) # c) * d) none
d) none
26⟩ Why does the function arguments are called as signatures?
The arguments distinguish functions with the same name
(functional polymorphism). The name alone does not
necessarily identify a unique function. However, the name
and its arguments (signatures) will uniquely identify a
function.
In real life we see suppose, in class there are two guys
with same name, but they can be easily identified by
their signatures. The same concept is applied here.
ex:
class person
{
public:
char getsex();
void setsex(char);
void setsex(int);
};
In the above example we see that there is a function setsex
() with same name but with different signature.
27⟩ Which is not an attribute of an object? a) behavior b) state c) time d) space
c) time
28⟩ Why should project managers complete hard problems first in an OOSAD project?
The query actually holds good in general for every situation in life. It is one of the principles of good time management.
The idea is to tackle hard (and important) problems first. This, if resolved - will pep up your confidence to deal with other not so hard issues. Also, this could have cascading effect on other issues that may get resolved on its own.
I would rather stress on "important" than "hard" issues. If a "hard" problem is not coming in the way of your deliverables (means it is not important) - keep it aside. There is no need to spend a lot of time on it.
29⟩ UML is not a language for a) visualization b) documentation c) simplification d) construction
c) simplification
30⟩ Can link and Association applied interchangeably?
No, You cannot apply the link and Association interchangeably. Since link is used represent the relationship between the two objects.
But Association is used represent the relationship between the two classes.
link :: student:Abhilash course:MCA
Association:: student course
31⟩ Differentiate Aggregation and containment?
Aggregation is the relationship between the whole and a part. We can add/subtract some properties in the part (slave) side. It won't affect the whole part.
Best example is Car, which contains the wheels and some extra parts. Even though the parts are not there we can call it as car.
But, in the case of containment the whole part is affected when the part within that got affected. The human body is an apt example for this relationship. When the whole body dies the parts (heart etc) are died.
32⟩ Why generalization is very strong?
Even though Generalization satisfies Structural, Interface, Behaviour properties. It is mathematically very strong, as it is Antisymmetric and Transitive.
Antisymmetric: employee is a person, but not all persons are employees. Mathematically all As’ are B, but all Bs’ not A.
Transitive: A=>B, B=>c then A=>c.
A. Salesman.
B. Employee.
C. Person.
Note: All the other relationships satisfy all the properties like Structural properties, Interface properties, Behaviour properties.
33⟩ Why is planning too much up front a mistake in an OOSAD?
You cant plan only for the current phase of the project as
your future activities are still coarse granular. To have
good plannig you need to have fine granularity w.r.t the
tasks to get clear WBS
34⟩ How to represent the interaction between the modeling elements?
Model element is just a notation to represent (Graphically) the entities that exist in the problem domain. e.g. for modeling element is class notation, object notation etc.
Relationships are used to represent the interaction between the modeling elements.
The following are the Relationships.
Association: Its' just a semantic connection two classes.
e.g.:
Aggregation: Its' the relationship between two classes which are related in the fashion that master and slave. The master takes full rights than the slave. Since the slave works under the master. It is represented as line with diamond in the master area.
ex:
car contains wheels, etc.
car
Containment: This relationship is applied when the part contained with in the whole part, dies when the whole part dies.
It is represented as darked diamond at the whole part.
example:
class A{
//some code
};
class B
{
A aa; // an object of class A;
// some code for class B;
};
In the above example we see that an object of class A is instantiated with in the class B. so the object class A dies when the object class B dies.we can represnt it in diagram like this.
Generalization: This relationship used when we want represents a class, which captures the common states of objects of different classes. It is represented as arrow line pointed at the class, which has captured the common states.
Dependency: It is the relationship between dependent and independent classes. Any change in the independent class will affect the states of t
35⟩ What do you meant by static and dynamic modeling?
Static modeling is used to specify structure of the objects that exist in the problem domain. These are expressed using class, object and USECASE diagrams.
But Dynamic modeling refers representing the object interactions during runtime. It is represented by sequence, activity, collaboration and statechart diagrams.
36⟩ A ________ is a contract or an obligation of a class. a) constraint b) note c) responsibility d) none
c) responsibility
37⟩ _________ relationship is used to model an inheritance. a) specialization b) generalization c) dependency d) none
b) generalization
38⟩ A relationship between use cases and collaboration can be viewed as ____________ relationship. a) association b) generalization c) link d) realization
d) realization
39⟩ A ________ is a condition or situation during the life of an object during which it satisfies some condition, performs some activity, or waits for some events. a) class b) state c) activity d) specification
b) state
40⟩ In the description of a class, a protected operation is shown by a) + b) # c) - d) none
b) #
