Answer Posted / kishor patil

Inheritance defines the relationship is-a(also called the
superclass-subclass relationship) between a superclass and
it's subclasses. This means that an object of a subclass
is-a superclass object,and can be used wherever an object
the of superclass can be used.

For EX-Suppose person is a superclass of Teacher
class,Driver class,Engineer class.

Here we can say every Teacher is person,Every Driver is
a person,And Every Engineer is a person ,but vice -versa
not true i.e Every person can not be teacher or driver or
Engineer.


Aggregation Defines the relationship has-a(also called
whole-part relatioship)between an instance of class and
it's constituents(also called parts).Aggregation comprises
the usage of objects.

We can say that a composite object built from the
constituent objects that are its parts .


For EX- Vehical is class.

vehical has a wheel,
vehical has a engine,
vehical has a stearing ,
vehical has a gear.


means vehical has a parts like
wheel,engine ,stearing ,gear.

What is function and its uses?

1128

---

What are memory tables?

1103

---

Explain about oops concepts.

1130

---

What is time complexity algorithm?

1055

---

what is the major difference between linkedlist and arraylist in java?

1228

---

What is a function argument in java?

1008

---

Explain the difference between treeset and treemap in java?

981

---

Define immutable object?

1069

---

What is a ternary operator in java? What is an interface?

1006

---

Is singleton thread safe in java?

993

---

What is assembly used for?

1027

---

Which java collection does not allow null?

1158

---

There are two classes named classa and classb. Both classes are in the same package. Can a private member of classa can be accessed by an object of classb?

1497

---

What is classes in java?

947

---

What is the difference between comparison done by equals method and == operator?

1033

---