JAVA Interfaces and Abstract Classes Runnable is a _____ . interface abstract class method class vaiable interface abstract class method class vaiable ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following class definitions defines a legal abstract class? public class abstract A { abstract void unfinished(); } class A { abstract void unfinished() { } } class A { abstract void unfinished(); } abstract class A { abstract void unfinished(); } public class abstract A { abstract void unfinished(); } class A { abstract void unfinished() { } } class A { abstract void unfinished(); } abstract class A { abstract void unfinished(); } ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes What will be the output when the following program is compiled and executed?abstract class TestAbstract{ String my_name; String myName(){ my_name = "Examveda"; return my_name; } abstract void display();}public class Test extends TestAbstract{ void display(){ String n = myName(); System.out.print("My name is "+ n); } public static void main(String args[]){ Test t = new Test(); t.display(); }} Program will compile and execute successfully and prints None of these Compilation error as class can not be declared as abstract. Program compiles but leads to runtime exception. Compilation error occurs as the abstract class TestAbstract contains a non-abstract method. Program will compile and execute successfully and prints None of these Compilation error as class can not be declared as abstract. Program compiles but leads to runtime exception. Compilation error occurs as the abstract class TestAbstract contains a non-abstract method. ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have a default constructor. Which of the following is correct?1. A a = new A();2. A a = new B();3. B b = new A();4. B b = new B(); 1 and 3 2 and 3 2 and 4 1 and 2 3 and 4 1 and 3 2 and 3 2 and 4 1 and 2 3 and 4 ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following statements regarding abstract classes are true? An abstract class can be used as a data type. An abstract class can be extended. A subclass can override a concrete method in a superclass to declare it abstract. A subclass of a non-abstract superclass can be abstract. All of these An abstract class can be used as a data type. An abstract class can be extended. A subclass can override a concrete method in a superclass to declare it abstract. A subclass of a non-abstract superclass can be abstract. All of these ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes interface Test{ int p = 10; //line 1 public int q = 20; //line 2 public static int r = 30; //line 3 public static final int s = 40; //line 4}Which of the above line will give compilation error? 2 4 1 3 None of these 2 4 1 3 None of these ANSWER DOWNLOAD EXAMIANS APP
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