Answer Posted / nagesh

OOP is Nothing but Object Oriented Programming.
In OOPs concept is implimented in our real life systems.
OOPs have following features
1. Object - Instance of class
2. Class - Blue print of Object
3. encapsulation - Protecting our data
4. polymorphism - Different behaviors at diff. instances
5. abstraction - Hidding our irrelavance data
6. inheritence - one property of object is aquring to
another property of object
7.Message Passing:message passing is possible from one
object to another
8.Robust and Secure: every object is strong one.
every object is secure one with their access specifiers.

Can a method be overloaded based on different return type but same argument type?

970

---

How many bits is a float?

1010

---

Difference between static synchronization vs. Instance synchronization?

1121

---

What is an immutable object? How do you create one in java?

1065

---

What is the difference between compiler and jvm?

1055

---

What happens when a thrown exception is not handled?

1115

---

Is stringwriter thread safe?

998

---

Is null a value?

1040

---

What is the purpose of using javap?

1100

---

Can a java program have 2 main methods?

1050

---

How to display all the prime numbers between 1 and n (n is the number, get the input from user)

983

---

What is ascii format?

994

---

What is the default value of an object reference declared as an instance variable?

1124

---

What is the use of callablestatement?

1021

---

Give a practical example of singleton class usage?

1058

---