Answer Posted / neojava

System is a built-in class present in java.lang package.
This class has a final modifier, which means that, it cannot
be inherited by other classes.
It contains pre-defined methods and fields, which provides
facilities like standard input, output, etc.

out is a static final field (ie, variable)in System class
which is of the type PrintStream (a built-in class, contains
methods to print the different data values).
static fields and methods must be accessed by using the
class name, so ( System.out ).

out here denotes the reference variable of the type
PrintStream class.

println() is a public method in PrintStream class to print
the data values.
Hence to access a method in PrintStream class, we use
out.println() (as non static methods and fields can only be
accessed by using the refrence varialble)

What is scope & storage allocation of global and extern variables? Explain with an example

587

---

Can memory leak happen java?

600

---

What is the purpose of skeleton and stub?

590

---

What do you mean by exception handling in Java?

666

---

Which sorting algorithm is best in java?

539

---

---

How long will it take to learn java?

511

---

What is the purpose of declaring a variable as final?

490

---

What is the difference between throw and throws in java?

559

---

why Java does not support multiple inheritances?

706

---

What is return keyword in java?

572

---

What are register variables what are the advantages?

452

---

How are destructors defined in java?

580

---

What are the principle concepts of oops?

540

---

Why we use set in java?

522

---

What is a method signature java?

583

---