JAVA Interfaces and Abstract Classes Runnable is a _____ . vaiable class method abstract class interface vaiable class method abstract class interface ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes What will be the output?1. public interface InfA{2. protected String getName();3. }public class Test implements InfA{ public String getName(){ return "test-name"; } public static void main (String[] args){ Test t = new Test(); System.out.println(t.getName()); }} Compilation fails due to an error on lines 1 test-name Compilation succeed but Runtime Exception Compilation fails due to an error on lines 2 None of these Compilation fails due to an error on lines 1 test-name Compilation succeed but Runtime Exception Compilation fails due to an error on lines 2 None of these ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following class definitions defines a legal abstract class? abstract class A { abstract void unfinished(); } class A { abstract void unfinished(); } public class abstract A { abstract void unfinished(); } class A { abstract void unfinished() { } } abstract class A { abstract void unfinished(); } class A { abstract void unfinished(); } public class abstract A { abstract void unfinished(); } class A { abstract void unfinished() { } } 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 3 and 4 1 and 2 2 and 4 2 and 3 1 and 3 3 and 4 1 and 2 2 and 4 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following declares an abstract method in an abstract Java class? public abstract void method() {} public abstract void method(); public abstract method(); public void abstract Method(); public void method() {} public abstract void method() {} public abstract void method(); public abstract method(); public void abstract Method(); public void method() {} ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes What will be the output for the below code ?public interface TestInf{ int i =10;}public class Test{ public static void main(String... args){ TestInf.i=12; System.out.println(TestInf.i); }} Runtime Exception 10 Compile with error 12 None of these Runtime Exception 10 Compile with error 12 None of these ANSWER DOWNLOAD EXAMIANS APP
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