Answer Posted / vijayakumar chinnasamy

Casting means converting values from one data type to
other data type.For example to convert the int values to
float type vlaues.

Types of casting:
1. Downcasting -source is larger than destination type
2. upcasting - Source is smaller than destination type.

casting can be applicable to both primitive type and Object
type.

primitive type - convert numeral to floating point and vice
versa.
Object type - converting from subclass to super class or
vice versa.
superClassObj = subClassObj;

What is dot operator?

1036

---

Mention some interfaces implemented by linked list in java.

1022

---

Does set allows null in java?

962

---

How do you add an arraylist to an array in java?

982

---

What do you mean by singleton class in java?

910

---

Can we use string in the switch case?

1043

---

What is collection api?

1058

---

Which sorting is best in java?

1001

---

Is a method a procedure?

1052

---

What is the difference between JDK and JVM?

1272

---

Why string is immutable with example?

981

---

What is the difference between variable & constant?

1029

---

How does a for loop work?

988

---

What are the java ide's? Explain

1054

---

What is a variable declaration?

981

---