Declaration and Access Control Choose the correct statement. Restriction on static methods are: I. They can only call other static methods.II. They must only access static data.III. They cannot refer this or super in any way. (I) and (II) (II) and (III) Only (I) Only (III) (I), (II) and (III) (I) and (II) (II) and (III) Only (I) Only (III) (I), (II) and (III) ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control Determine output:class A{{System.out.print("b1 ");}public A(){System.out.print("b2 ");}}class B extends A{static{System.out.print("r1 ");}public B(){System.out.print("r2 ");}{System.out.print("r3 ");}static{System.out.print("r4 ");}}public class Test extends B{public static void main(String[] args){System.out.print("pre ");new Test();System.out.println("post ");}} Compilation fail r1 r4 pre b1 b2 r3 r2 post pre r1 r4 b1 b2 r2 r3 post r1 r4 pre b1 b2 post r1 r4 pre b1 b2 post r3 r2 Compilation fail r1 r4 pre b1 b2 r3 r2 post pre r1 r4 b1 b2 r2 r3 post r1 r4 pre b1 b2 post r1 r4 pre b1 b2 post r3 r2 ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control You have the following code in a file called Test.javaclass Base{ public static void main(String[] args){ System.out.println("Hello"); }}public class Test extends Base{}What will happen if you try to compile and run this? It will fail to compile. Runtime error Compiles and runs printing Compiles and runs with no output. It will fail to compile. Runtime error Compiles and runs printing Compiles and runs with no output. ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control What is the result of compiling and running the following code?public class Tester{static int x = 4;public Tester(){System.out.print(this.x); // line 1Tester();}public static void Tester(){ // line 2System.out.print(this.x); // line 3}public static void main(String... args){ // line 4new Tester();}} Compile error at line 3 (static methods can't invoke this) Compile error at line 1 (static x must be only accessed inside static methods) 44 Compile error at line 4 (invalid argument type for method main ) Compile error at line 2 (constructors can't be static) Compile error at line 3 (static methods can't invoke this) Compile error at line 1 (static x must be only accessed inside static methods) 44 Compile error at line 4 (invalid argument type for method main ) Compile error at line 2 (constructors can't be static) ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct? In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined. This method is only accessible from inside the class itself and from inside all subclasses. From within protected methods you do not have access to public methods. This method is accessible from within the class itself and from within all classes defined in the same package as the class itself. In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined. This method is only accessible from inside the class itself and from inside all subclasses. From within protected methods you do not have access to public methods. This method is accessible from within the class itself and from within all classes defined in the same package as the class itself. ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control What is the result of compiling and running the following code?class Base{ private Base(){ System.out.print("Base"); }}public class test extends Base{ public test(){ System.out.print("Derived"); } public static void main(String[] args){ new test(); }} Derived Compilation Error BaseDerived Exception is thrown at runtime Derived Compilation Error BaseDerived Exception is thrown at runtime ANSWER DOWNLOAD EXAMIANS APP
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