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Indicates that a method or class field does not belong

to anyone

can use only from a class object

Indicates that a method or class field does not belong

to an object, but to a class

There are next classes

Which lines of code compile without any error in main method?

Interface1 i3 = new Class4();

Interface1 i1 = new Class1();

Class2 c5 = (Class2) new Class2();

Class2 c2 = new Class3();

Class1 c3 = new Interface1();

Class1 c1 = new Class2();

Interface1 i2 = new Class2();

Class1 c4 = new Class3();

In some class named "A" internal

class named "B" is described. Based on this scenario please create an

object of internal class "B" in some external class (not "A")

// file A.java

// file C.java

A.B b = new A().new B();

B b = new A().new B();

A a = new A(); A.B b = a.new B();

B b = new B();

A.B b = new A().B();

What will be the result of the following code?

Compile error

Runtime error

There are a few classes

Which of the next method should be inserted in Class4 to compile without error?

Class2 method() { return new Class1(); }

Class3 method() { return null; }

Class1 method() { return null; }

Class2 method() { return null; }

Class3 method(int t) { return null; }

Class2 method() { return new Class2(); }

Class3 method() { return new Class2(); }

Class1 method() { return new Class2(); }

If we use import a.b.*; will classes of a.b.c package be imported?

There are two packages.

a.b.c.*; //(1)

a.b.*; //(2)

There are classes

Which line of code should add to the method in Class3 to get "Class 1" as a result from method main

super.this.method();

method();

this.super.method()

It is not possible

super.method();

super.super.method();

Select all the core concepts of OOPS

Encapsulation

Inheritance

Generics

Polymorphism

Interface

Abstract class